Unix Tip: FILES OPENED BY A PROCESS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3306 - February 27, 2016

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FILES OPENED BY A PROCESS

This is supported on Sun Solaris, not too sure about
other Unix flavours.

I badly wanted to find out all the files opened by
a process, and that is when I found pfiles.

Usage :
/usr/proc/bin/pfiles <pid>

Where pid is the process-id of the process.

It lists the inode numbers of all the files, opened
by that process.


This tip generously supported by: mdhar@miel.mot.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: BACKUP THE REMOTE ESSENTIALS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3305 - February 26, 2016

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

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BACKUP THE REMOTE ESSENTIALS

There are many programs, data files, and especially
license files that sit out on remote workstations
and servers that you may should be backing up
remotely.

If backing up the entire system puts a strain
on your network, make sure that all the essential
files at least get backed up.

Some files may be
/var/flexlm
/usr/local/flexlm
/var/netls
/var/license
/etc/passwd
/etc/hosts
/etc/groups
/etc/netgroups
/etc/shadow
/vmunix
/kernel
etc....


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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 REMOVAL

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3304 - February 25, 2016

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

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STRING REMOVAL

What the following does:

rm `ls -al | grep str | awk '{if ($9 !~ /^str/) {print $9}'`

Removes all files that contains the string "str" excepts
those that begin with it. Changing the !~ to =~ does the
opposite.




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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: KILLING MORE USERS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3303 - February 24, 2016

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

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KILLING MORE USERS

*** SORRY ABOUT THE PEVIOUS NULL TIP IF YOU RECEIVED IT****

To kill all processes of a particular user from root
at unix prompt type:

# kill -9 `ps -fu username |awk '{ print $2 }'|grep -v PID`

We can also use the username as an argument and pass it from
command line, if this command is put as a script.



This tip generously supported by: merveille@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: BASH HOTKEYS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3302 - February 23, 2016

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

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BASH HOTKEYS

Bash provides many hot keys to ease use. Like
ctrl-l -- clear screen
ctrl-r -- does a search in the previously given commands so that you don't
have to repeat long command.
ctrl-u -- clears the typing before the hotkey.
ctrl-a -- takes you to the begining of the command you are currently typing.
ctrl-e -- takes you to the end of the command you are currently typing in.
esc-b -- takes you back by one word while typing a command.
ctrl-c -- kills the current command or process.
ctrl-d -- kills the shell.
ctrl-h -- deletes one letter at a time from the command you are typing in.
ctrl-z -- puts the currently running process in background, the process
can be brought back to run state by using fg command.
esc-p -- like ctrl-r lets you search through the previously given commands.
esc-. -- gives the last command you typed.


This tip generously supported by: mchulet@cabletron.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: MORE ON VI LAZY EXISTS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3301 - February 22, 2016

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

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MORE ON VI LAZY EXISTS

Addendum to VI LAZY EXITS

There is a difference between ZZ and :wq! ZZ will NOT force a write on a
read only file :wq! will.

Also be careful with ZZ if you inadvertently press Control ZZ you will
have stopped jobs.




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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: PIPES AND QUOTING

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3300 - February 21, 2016

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

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PIPES AND QUOTING

When you do rsh (remsh in HP-UX) followed by a series of
pipes, consider carefully whether you want the pipe processes
to run on the local or the remote host. If you quote the
pipes, then they become part of the arguments passed to
the remote host and evaluated there. E.g.

rsh myRemoteHost last "|" grep userName "|" head

(In this example, we pipe the output of last to grep,
because in Solaris "last userName" only shows console
logins, not FTP logins.)


This tip generously supported by: bhamilto@world.northgrum.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: SPACES TO UNDERSORE 1 LINER

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3299 - February 20, 2016

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

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SPACES TO UNDERSORE 1 LINER

Do you hate users who put spaces in file names, preventing
you from doing any sort of scripting?

Well then this is the little one-liner for you to pop in a
shell script then...

for i in $1 ; do mv "$i" `echo $i | sed 's/ /_/g'` ; done

the echo $i | sed 's/ /_/g' is surrounded by back-tics not
regular quotes.



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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: NEW TIP BETTER THAN OLD TIP!

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3298 - February 19, 2016

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

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NEW TIP BETTER THAN OLD TIP!

Sorry about the Y2K tip, we have been
testing a new Tip mailer. Hated it!
Here is the real tip that was
suppose to go out today:

------------------------------

WALK THE CUBES

Some times at work there are
dry periods when the users don't
call. Walk the halls even if
there is nothing to do. Being
seen by users makes them feel that
you are always around for them.

Some users are hesitant to call at
times, and some feel you are never
around to help. When you walk
the area ask different users each
time if everything is alright.
A simple way to stay proactive.

Also, if you charge your time
back to a department, make sure that
you walk past managers offices. They
will feel that you are there to work
on the employees problems and
they're being well taken care of.
Even if everythig is okay, and they
ask what the problems are, let them
know you are there because you care.

Alittle TLC goes along ways.


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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: REGULAR EXPRESSION FOR FLOATING POINT NUMBER

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3297 - February 18, 2016

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

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REGULAR EXPRESSION FOR FLOATING POINT NUMBER

This the Regular expression for floating point numbers and
this can be used with grep or egrep for searching
floating point numbers in any text file.

(\+|-)?([0-9]+\.?[0-9]*|\.[0-9]+)([eE](\+|-)?[0-9]+)?



This tip generously supported by: udayk@india.hp.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: CHANGING PERMS RECURSIVELY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3296 - February 17, 2016

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

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CHANGING PERMS RECURSIVELY

*** NOTE: Odly enough, the previous mailing
of this tip did not go through do to a
permissions problem. Sorry.

To change permissions recursively for all files in a
directory

find dirname -exec chmod xxx {} \; -print

where dirname is the directory you want to change permissions.



This tip generously supported by: avsrao_india@hotmail.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: METAVALUES FROM A SHELL SCRIPT

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3295 - February 16, 2016

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

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METAVALUES FROM A SHELL SCRIPT

Getting a file's size, link count or other metavalue in a shell script:

When you want to extract a specific piece of meta information about a
specific file (such as it's size, link count, or one of its time stamps)
you can use the find -printf option and any of the various
%-directives listed in the find(1) man page. Example:

size=$(find some_file -printf "%s" )

(under ksh, bash, and similar shells). Here the $() form
is used as a more readable equivalent to the older `` (back
tick) operator. (Another advantage to the $() is that it
is nestable). To get the user name of the owner of a
file "foo" you could use:

set owner = `find foo -maxdepth 0 -printf "%u"`

(here we're using the csh syntax). This also uses
the -maxdepth option in case "foo" is actually a
directory name; since we don't want find to
spend time traversing directory and printing the
owners to ALL of the entries thereunder. A
maxdepth of zero ensures that this will only print
the detail we want on the specific link that we
named on the command line.

This can be much more flexible than the options provided
by the test command (try to see which of two files is
larger, or if to files are owned by the same user or
assigned to the same group, using just test).



This tip generously supported by: jdennis@linuxcare.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: CHANGING OWNERS REGULARLY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3294 - February 15, 2016

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

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CHANGING OWNERS REGULARLY


If you're an SA and need to change file ownership permissions
on a regular basis, this script may help you. If you want to
change the ownership of all the files owned by abc user to xyz
user, this can be accomplished by chgowner abc xyz with this
script. Of course you should have rootly powers(deity) to change
other people's files ;).

----Cut Here ----

#!/bin/ksh
#chgowner - written by Rainer Raab on Solaris 2.5.1

if [ $# -eq 2 ]; then
OLDOWNER=$1
NEWOWNER=$2
else
echo "usage: `basename $0` [original file owner] [new file owner]"
exit 1
fi

PATH=/usr/bin:/usr/ucb:/usr/local/bin

FILES=`ls -Al|grep $OLDOWNER|awk '{print $9}'|grep -v "./"`
for i in $FILES; do
chown $NEWOWNER $i
done


---- Cut Here ----


This tip generously supported by: rainer_raab@yahoo.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: CLEANING DIRECTORIES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3293 - February 14, 2016

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

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


CLEANING DIRECTORIES

The creation of many temporary files
in Unix during compilations, occupies
a lot of memory space. This can be
got rid of by using a simple script.

find $1 \( -name a.out -o -name '*.o' -o -name 'core' -o -name '*.ii' -o -name '*.ti' -o -name '*.class' -o -name '*.pur' \) -exec rm {} \;

Save the above line in a file and run
this file after changing permissions.
For example, if the file containing
the above code has the name 'clean',
then:

example% clean

will remove all the files specified
in the script in the directory and
all other subdirectories within it.
You can add or remove any number of
files in the script, to suit your
needs.

This tip generously supported by: vmanand@hotmail.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: REMOVING BLANK LINES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3292 - February 13, 2016

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

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


REMOVING BLANK LINES

To remove blank lines from a file using sed, use the following:

sed -e '/^$/d' filetoread >filetowrite

The ^ matches the beginning of a line and the $ matches the end.
The two of them together matches a line that begins and ends with
nothing in between (blank line).
The d just says delete the lines for which we have a match.
Since the standard operation of sed is to print every line,
all lines exept blank lines will be sent to filetowrite.


This tip generously supported by: code@ionet.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
==========================================================================

Unix Tip: SORT BY FILE SIZE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3291 - February 12, 2016

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

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


SORT BY FILE SIZE


Sort a directory / certain files in a directory
by file size (HP-UX):

===================== begin script =======================
#!/bin/ksh
# script Ls
# use 1 : Ls
# use 2 : Ls *
if [ -n "$*" ]
then
ls -1 -al $* | sort -nbk5
else
ls -al | sort -nbk5
fi
===================== end script =========================



This tip generously supported by: Marc.VanOosterwyck@vlafo.be





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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: ZERO THOSE LOG FILES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3290 - February 11, 2016

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

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


ZERO THOSE LOG FILES


Some programs write to multiple
log files in a directory and
need to be zeroed out sometimes
to save diskspace. The following
ksh shell script will zero out
all files with the ".log"
extension in a directory.

--- cut here ---
for object in *.log
do
> $object
print "$object has been zeroed!"
done
--- cut here ---

Just a little time saver when
you have 100 other things to
be doing.


This tip generously supported by: clankell@ucsinet.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.

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

Unix Tip: REBOOTING BECAUSE OF FORK BOMBS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3289 - February 10, 2016

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REBOOTING BECAUSE OF FORK BOMBS


There is nothing more frustrating
for an Administrator who has to
reboot system due to fork bomb

(the number of processes in the
system reaches the maximum limit
when a user, even a superuser,
tries to execute some command, the
system will respond with Vfork
failed)

In Solaris under SPARC, this can be
controlled by specifying a line in
/etc/system

set maxuprc=64

And reboot the system. Now a user
can have maximum of 64 processes
under his ownership. By default
the 'maxuprc' value is
16*maxusers - 5 where
'maxusers' is another tunable
parameter in /etc/system

Caution : You should have a backup
of /etc/system file before you make
the changes. So that you can revert
back to old system file using
boot -a option in case of
inconsistent system file.


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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: WHAT TIME IS IT REMOTELY?

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3288 - February 9, 2016

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WHAT TIME IS IT REMOTELY?

To get time on a remote UNIX machine within the same domain,
you can use the command:

% telnet 13

Trying ...
Connected to
Escape character is '^]'.
Fri Aug 27 19:20:27 1999
Connection closed by foreign host.

You can create a handy alias for the following command
to get the remote time:

telnet 13 | grep :


This tip generously supported by: bhavin@informix.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.

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Unix Tip: VALUE OF LAST PARAMETER

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3287 - February 8, 2016

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VALUE OF LAST PARAMETER

Get the value of the last parameter
passed into a korn shell script.

eval last=\${$#}

Now $last is the last parameter passed 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: INSERT A LINE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3286 - February 7, 2016

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INSERT A LINE

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: FINDING CORE FILES

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

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3285 - February 6, 2016

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FINDING CORE FILES

To find and remove core files
conditionally:

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

"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 ##############

# 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


This tip generously supported by: sparkman@webmd.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
==========================================================================

Unix Tip: IDENTIFY A PROCESSES

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

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3284 - February 5, 2016

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IDENTIFY A PROCESSES

The command fuser is very
handy when you want to know
which processes or users
have a file open. Its basic
syntax is:

/etc/fuser -u /usr/my_application/foo

You must enter the file's full
path name, as shown above.

The fuser command is located
under the /etc directory on HP-UX,
AIX and SCO flavors. You must
login as root to use it.

Its output is a raw list of
processes id numbers and users login
names.

Please refer to your Unix man pages
to find more about this useful command.


This tip generously supported by: tinaco110@hotmail.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: LOOK FOR A STRING

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3283 - February 4, 2016

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LOOK FOR A STRING

Sometimes you look for a string
in files on your directory using
grep, but you end up getting funny
characters on your terminal. This
is really annoyance, since sometimes
you have to reset your terminal if
you are using X. What you can do,
you can grep only those files that in
text by doing the following command:

grep "hello world" `find ./ -name "*" -print -exec file {} \; |
grep text | cut -d ':' -f 1`

Sure you have to change the "hello World"
to the string what you are looking for.




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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: STOP ASKING QUESTIONS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3282 - February 3, 2016

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


STOP ASKING QUESTIONS

What's the best way to become a UNIX guru?
Learn UNIX.

There are two great resources available to
the UNIX programmer that give general help
and often examples. One is the "man" command.

ex. man vi
The other is the "-?" command line option.
ex. sort -?

These will tell you all you need to know
about most commands.

I suggest that newbies look at the following
man pages:

vi - probably the best text editor ever made
sh/ksh/csh - my favorite flavor is ksh
awk - fantastic!!
sed - dull but indispensable

Spend some time looking at the man pages.
At the end there is usually a list of related
commands, a great way to enhance your UNIX
vocabulary!


This tip generously supported by: jcolman@bigfoot.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: DIR ALIAS REPRISE

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

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3281 - February 2, 2016

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DIR ALIAS REPRISE

The following alias will list just
the directories in a directory and
not other ordinary files. It will
list a directory as a directory even
if the directory is a symbolic link.

alias dir='ls -Lla|grep ^d'

Without the capital "L" in this alias
the alias will not list directories
that are symbolic links.


This tip generously supported by: eric_furman@hotmail.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: ANOTHER DOS ^M Solution FOR SCO

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

UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3280 - February 1, 2016

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ANOTHER DOS ^M Solution FOR SCO

If you deal with DOS files and the
"^M" character always appears at
the end of the line, here is a command
provide in SCO-UNIX.

dtox -- change file format from MS-DOS to UNIX

>From a Unix shell use the command:

dtox filename > output.file

Other flavers have similar commands:
dos2unix or to_unix

Check your man pages ont he flavor you use.
If you have whatis set up. Use a

man -k dos




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