Unix Tip: REMOVING CORES CONDITIONALLY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3460 - July 31, 2013

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REMOVING CORES CONDITIONALLY

To find and remove core files
conditionally:

PROMPT> find ~ -name core -exec file {} \; -exec rm -i {} \;

The File will show which
executable the core file is
for and the -i option to rm
will allow you to choose
weather to delete it or not.

################# EXAMPLE ###############################
PROMPT> find ~ -name core -exec file {} \; -exec rm -i {} \;
/my/home/core: ELF 32-bit LSB core file of 'netscape-commun'
(signal 3), Intel 8
rm: remove `/my/home/core'? y




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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

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==========================================================================

Unix Tip: INSERTING LINES WITHIN SCRIPTS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3459 - July 30, 2013

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INSERTING LINES WITHIN SCRIPTS


If you want to insert a line
at the top (or anywhere for
that matter) of a file within
a shell script, use the ed editor.

EXAMPLE:

string="hello"
ed << EOF
e any_file
1i
${string}


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: Rename files script

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3458 - July 29, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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Rename files script

If you want to rename files
in a directory then you can
use the following perl
script....

#!/usr/bin/perl
# rename: renames files according to the expr given on the command line.
# The expr will usually be a 's' or 'y' command, but can be any valid
# perl command if it makes sense. Takes a list of files to work on or
# defaults to '*' in the current directory.
# e.g.
# rename 's/\.flip$/.flop/' # rename *.flip to *.flop
# rename s/flip/flop/ # rename *flip* to *flop*
# rename 's/^s\.(.*)/$1.X/' # switch sccs filenames around
# rename 's/$/.orig/' */*.[ch] # add .orig to your source files in */
# rename 'y/A-Z/a-z/' # lowercase all filenames in .
# rename 'y/A-Z/a-z/ if -B' # same, but just binaries!
# rename chop *~ # restore all ~ backup files

use Getopt::Std;
my ($subst, $name);

if (!&getopts("nfq") || $#ARGV == -1) {
die "Usage: rename [-fnq] <perl expression> [file file...]
-f : Force the new filename even if it exists already
-n : Just print what would happen, but don't do the command
-q : Don't print the files as they are renamed
e.g. : rename 's/\.c/.c.old/' *
rename -q 'y/A-Z/a-z/' *\n";
}

$subst = shift; # Get perl command to work on
@ARGV = <*> if $#ARGV < 0; # Default to complete directory

foreach $name (@ARGV) {
$_ = $name;
eval "$subst;";
die $@ if $@;
next if -e $_ && !$opt_f; # Skip if the file exists if asked to.
mext if $_ eq $name;
if ($opt_n) {
print "mv $name $_\n";
next;
}
print "mv $name $_\n" if !$opt_q;
rename($name,$_) or warn "Can't rename $name to $_, $!\n";
}

Put the script called rename in /usr/local/bin. Make sure
/usr/local/bin is in your $PATH for convenience.


This tip generously supported by: dave.ruddle@siemens.co.uk




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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: BOURNE SHELL PSEUDO HASH TABLES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3457 - July 28, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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BOURNE SHELL PSEUDO HASH TABLES

The best way to explain this
is with an example:

You may want to write a simple
script that launches an xterm
window with different color
options. Pseudo hash tables in
bourne shell.

$ xwindow MidnightBlue

An easy way to this is by first
listing the supported colors in
the script (pseudo hash table):

DarkSlateGrey="#2f4f4f"
DimGrey="#696969"
MidnightBlue="#191970"
NavyBlue="#000080"

Next, simply grab the hex color
code by using the following
command:

BGColor=`eval echo $"$(echo $1)"`

"$(echo $1)" evaluates to "MidnightBlue" and
`eval echo $MidnightBlue evaluates to "#191970".

Simply launch the xterm window
using $BGColor as the background
color:

xterm -bg="$BGColor" &

This method for extracting pseudo hash
values may be used for NIS map files,
file date stamps, GUI colors, etc.


This tip generously supported by: Jasper.Silvis@PHL.Boeing.com




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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: BE A GURU - RTFM

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3456 - July 27, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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BE A GURU - RTFM

The best way, is to learn
to be the best Unix Guru is
take the time to RTFM. Do
not always depend on someone
else to be there with the
knowledge.

DON'T BE LAZY!

By the Way, for those that
don't know by now.

RTFM = READ THE F^CKING MANUAL


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: ONE STEP AT A TIME WITH !!

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3455 - July 26, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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ONE STEP AT A TIME WITH !!

For example using C shell I want
to edit a handful of files that
contain the string "ProcessInput"
in my current directory.

Step 1:
Find the files which uses "ProcessInput"

% grep "ProcessInput" *.c
a.c:ProcessInput ( int a )
b.c:Description : ProcessInput is used to process the input
given by the user
b.c:Call ProcessInput to perform ...
c.c:val = ProcessInput(2) ;
c.c:val = ProcessInput(3) ;

Step 2:
Extract the filenames on the left.
$!! | awk -F: '{print $1}'
a.c
b.c
b.c
c.c
c.c

step 3:
Remove the duplicates
!! | sort -u

Step 4:
Now edit it !
vi `!!`

which runs vi `grep "ProcessInput" *.c | awk -F: '{print $1}'
| sort -u`


This tip generously supported by: desikann@future.futsoft.com




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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: PRINTING WITH NO SPACE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3454 - July 25, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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PRINTING WITH NO SPACE

Sometimes there isn't enough space
in the spooling directory to print
a large file. This isn't the case
so much anymore since disk drives
are so large now.

If the file fills up the spooling
directory use and you are using
BSD "lpr" then you can pass it
the -s option.

This will create a symlink to the
file instead of coping it.

"lp" creates a symlink by default.
You can use the -c options to
force it to copy the file instead,
if needed.

Some flavors differ, check yours.


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: To grab all hidden files

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3453 - July 24, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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To grab all hidden files

A safe way of grabbing all "hidden"
files is to use '.??*' rather than
'.*' since this will only match 3
or more characters. Admittedly,
this will miss any hidden files
that are only a single character
after the ., but it will always
miss '.' & '..', which is probably
more important...

We can use .[a-zA-Z0-9]* to grab
all hidden files other
than . and .. we will not get
hidden files which dont have any
alphanumeric character following
the first '.' - can someone tell
how to go about this


This tip generously supported by: muraliaj@synopsys.com




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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: SAVE A COPY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3452 - July 23, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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SAVE A COPY

Ever edited a file, then wished
you'd saved a copy first?

This script will save it for you.
It even handles multiple files,
and multiple edits of the same file.

############### Cut here ##########
#!/bin/ksh
# My vi : Save a backup of the file(s) to edit
for file in $* ; do
if [[ -a $file ]] ; then
basefile=`basename $file`
cp $file ~/bak/${basefile}.`date +%C%y%m%d%H%M%S`
fi
done
/usr/bin/vi $*
############### Cut here ##########

You'll need to create a directory
called 'bak' in your $HOME directory,
and it would be a good idea to set up
a cron job to clear out old copies
periodically.


This tip generously supported by:
gordon.morrison@vf.vodafone.co.uk




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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: KEEPING PEOPLE OUT

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3451 - July 22, 2013

http://www.ugu.com/sui/ugu/show?tip.today

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KEEPING PEOPLE OUT

If you want to keep people
of your server, but want them
to access their pop mail on
the same box set up the following
line in the password file:

babba:rtnRkIgCy4l4T:830:10:Babba Booie:/home/babba:/bin/nologin


Then create a script called
/bin/nologin that contains:

#! /bin/sh
echo "Sorry, but your account is only allowed POP access to this host."
exit 1

when a person attempts to log into
their defined shell it will run
the /bin/noling script, display
the message, and exit them from
the system

Have Fun



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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: STRING STRIPPING

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3450 - July 21, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


STRING STRIPPING

Remove all ^M and other control
characters from file ABC

strings ABC > ABC-good


This tip generously supported by:
brillj@constellation.navy.mil


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: TEXT FILE CASE REVERSAL

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3449 - July 20, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


TEXT FILE CASE REVERSAL


Ever want to reverse the entire case
of a text file:

o reverse the case of a text file:
tr 'a-zA-Z' 'A-Za-z' < inputfile


This tip generously supported by: vikram.kalsi@seepz.tcs.co.in




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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: VI MAN PAGES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3448 - July 19, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


VI MAN PAGES

Try saving a man page to
a file for viewing with vi.

You will see a whole bunch
of control characters.

How can you save a man page
in a form readable by vi?

$ man ls | col -b > readable_file.txt


This tip generously supported by: kmehta@legato.com


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: VI LINE NUMBERS

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3447 - July 18, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


VI LINE NUMBERS


Ever want line numbers
while editing a file:

:set number

We can see the line numbers...



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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: GETTING RID OF ^M

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3446 - July 17, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


GETTING RID OF ^M


How to get rid of ^M
in text files .

tr -d '^M' <inputfile >outputfile

But how to get this
'^M' in the command
line:

Keep CTRL pressed
and then press v and m



This tip generously supported by: sojan@psidata.com


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: REMOVE JUST THE FILES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3445 - July 16, 2013

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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


REMOVE JUST THE FILES

To removal only the files
(not subdirectories) in
the current directory, use
the following command:

rm `ls -l | grep -v '^d' | awk '{ print $9 }'`


This tip generously supported by: rrs@assc.com.ve


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: SOLARIS CHANGING SEASONS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3444 - July 15, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


SOLARIS CHANGING SEASONS

During a session, sometimes
we have a need to change the
system time for our session
only. We have used it to
simulate time based testing.

export TZ=ESThhEDT

The EST set your time to Eastern
Standard Time and EDT is Eastern
Daylight Time.

hh is the number of hours you
wish to change.

Example: Currently the system
date is Tue Jun 19 13:38:03 EDT 2001

and you wish to set it to
yesterday at the same time.
You would substitute a positive
29 for hh.

export TZ=EST29EDT

Now the shell time is:
Mon Jun 18 13:38:50 EDT 2001

WHY 29 and not 24? The main
UNIX clock is set from GMT not
EST therefore you have to add
5 hours to your backward
calculations to get the same
exact time since EST is
GMT - 5 hours.

Use negitive numbers to set
the clock into the future.

Also if you need to set the
minutes and seconds it is
hh:mm:ss. These are all the
number of hours, minutes and
seconds from GMT that you wish
to set.

This is for Solaris 2.6, your
mileage may vary.



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NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

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==========================================================================

Unix Tip: TAR ONLY THE FILES

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3443 - July 14, 2013

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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


TAR ONLY THE FILES

To tar only files (not
subdirectories) in the
current directory use
this command:

$ tar cvf files.tar ./`ls -l | grep -v '^d' | awk '{ print $9 }'`

This tip generously supported by: rrs@assc.com.ve


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DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: SHELL OUTPUT INTO VI

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3442 - July 13, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


SHELL OUTPUT INTO VI

In VI editor you can get
the output of any shell
command command inserted
into the file you are
editing by using:

:r!<command>

For example:

:r!who -r

inserts the ouput of the
command "who -r" to the
file currently being
edited.

This can be effectively used
to copy the contents of a
file to the file currently
being edited

ie,

:r!cat /etc/passwd

inserts all the contents of
the the /etc/passwd to the
file currently being edited.



This tip supported by: Prem Kumar S <sprem@wipro.co.in>


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: AVOID PERMISION DENIED

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3441 - July 12, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


AVOID PERMISION DENIED

To avoid 'Permission Denied'
messages when using the
'find' command:

in ksh :-
find <dir> -name '<file>' -print 2 > /dev/null

in csh :-
(find <dir> -name '<file>' -print >/dev/tty) >& /dev/null



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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: PROGRESS STATUS IN XTERM TITLEBAR

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3440 - July 11, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


PROGRESS STATUS IN XTERM TITLEBAR

Sometimes it is handy to be able
to show some information in the
xterms title bar, for example
if you download a set of large
files (thereby producing lots
of meaningless information on
the terminal) and you want to
know which file is actually
beeing downloaded.

For this purpose, I hacked a few
lines of shell code that would
put any information into the
xterms title bar. I called the
script ttshow.

#!/bin/sh
if [ -z $DISPLAY ]; then
echo "ESC]0; $* ^G"
fi

In this little script, the
string ESC has to be replaced
by one real escape character
(ascii 0x1b), the string "^G"
has to be replaced by a bel
character (ascii 0x07).

Now I can make my scripts like
this:

for file in in `cat filenames`; do
ttshow "downloading $file"
wget $file
done

..and it will tell me on the
first glance what it's doing.

For more information about
this, unpack the X distribution
and search for the file
ctlseqs.ms - this file belongs
to the xterm distribution and
contains all the escape
sequences xterm knows about.


This tip generously supported
by: ulinzen+ugu@sendmail.com


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: HP-UX REMOVE UNUSED SPACE

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3439 - July 10, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


HP-UX REMOVE UNUSED SPACE

To remove unused s/w and free
disk space in hp-ux use the
command:

freedisk [-a n] [-v]

Note: See man page for this
before executing this..


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: FILE SYSTEM CAPACITY ALERT

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3438 - July 9, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


FILE SYSTEM CAPACITY ALERT

#!/bin/sh
# This script can be used to
# warn the users that
# the file system is getting full
#
# Script needs adjusted for your
# needs. Below is set to monitor
# all the file systems mounted and report to
# RECEIVER
#
# Usage: as a cron entry for best use.


RECEIVER=nachiappan.ramanathan@aig.com

for fs in `df -k|awk '{print $1}'|sed -n "3,14 p"`
do
x=`df -kl | grep $fs | awk '{ print $5 }'`
y=50%

if [ $x -gt $y ]
then
message="File System `df -k |grep $fs |awk '{print $6\",
\"$5}'` Full!!!"
echo $subject
echo $message | mailx -s "`hostname` - File System Full
Warning !!!" $RECEIVER
fi
done



This tip generously supported by:
Nachiappan.Ramanathan@aig.com


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: Tru64 STTY DEC

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3437 - July 8, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


Tru64 STTY DEC

On Tru64 Unix (at least on 4.0F),
some non-root-user drop an error
message on the root's Mail
account when cronjobs used

su - foo -c /usr/bin/bar

Even some Compaq technicians could
not tell that this results from
terminal settings in the .profile,
which are invalid on non-interactive
terminals. The error messages
(2 in fact) looks like this:

stty: tcgetattr: not a typewriter
Not a terminal.

The solution is to wrap commands
like "stty dec" and "tset -I -Q"
with a check on terminal capabilities:

if tty -s
then
stty dec
tset -I -Q
fi


This tip generously supported by: nils@poppendiek.de


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: ELIMINATING MULTIPLE SPACES

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3436 - July 7, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


ELIMINATING MULTIPLE SPACES

Here is a simple script which
helps in eliminating multiple
spaces when one wants to
extract a particular column
in a set of records from a
file.

Here is an example to prove
the same:

ps -u $LOGNAME | tr -s " " : | cut -d: -f<column #>

The above script line can be
used to extract a column from
the output of a ps command for
a particular user ($LOGNAME).

This tip generously supported by: arunkv@lucent.com


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: FINDING PCI DEVICES

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3435 - July 6, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


FINDING PCI DEVICES

Want to get information
on PCI devices on your
Linux or FreeBSD machine?

On Linux use:

/sbin/lspci (-v is verbose)

On FreeBSD use:

pciconf -l


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: HANGING TIME ON HPUX

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3434 - July 5, 2013

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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


HANGING TIME ON HPUX

How can we change the
time zone on a HP-UX
machine ??

Answer : -Edit the entry
in /etc/src.sh and
/etc/src.csh, and
reboot


This tip generously supported by: anil_sedha@mumbai.tcs.co.in


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: FINDING MAC ADDRESS ON HP

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3433 - July 4, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


FINDING MAC ADDRESS ON HP

If you want to know the
MAC or eathernet address of
your lan card on an HP-UX
machine, then type:

lanscan

This will give you the mac
addresses of all the lan
cards installed on the
machine.


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: MAX FILES UNDER LINUX

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3432 - July 3, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


MAX FILES UNDER LINUX

Maximum number of files
that one process can
have open at one time can
be find out by using:

getconf OPEN_MAX




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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: WHY MV IS SLOW

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3431 - July 2, 2013

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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


WHY MV IS SLOW

mv command across filesystems
is slower on large files

WHY?

mv would be slow if you are
moving files across filesystem.

The inode number changes only
when a file is moved across
file system.

A new inode number means a new
file is physically created on
disk.

It remains unchanged, if it
is within the same filesystem.
One can verify by using
ls -il command on that file.

mv uses rename() system call.
if it fails, it uses copy routine
(basicailly reads from a file and
writes in another file).

mv command across filesystem is
more of a copy then mv.


This tip generously supported by: dkotian1@rediffmail.com


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================

Unix Tip: ECHO LINES TO A BLANK

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3430 - July 1, 2013

http://www.ugu.com/sui/ugu/show?tip.today

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


ECHO LINES TO A BLANK


To echo all lines in a
file upto the first blank
line use the following:

awk '$0 ~ /^$/ {exit;} {print $0;}' <file_name>

The awk script can be used
for printing lines upto the
first occurence of any
pattern.

Just substitute ^$ with
the pattern.

I wrote this script to parse
http server headers.

This tip generously supported by: anand@anandraman.net


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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================