=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3460 - July 31, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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.
Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================
Jumat, 31 Juli 2015
Kamis, 30 Juli 2015
Unix Tip: INSERTING LINES WITHIN SCRIPTS
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3459 - July 30, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3459 - July 30, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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
${string}
--------------------------------------------------------------------------
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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.
Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================
Rabu, 29 Juli 2015
Unix Tip: Rename files script
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3458 - July 29, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Rename files script
If you want to rename files
in a directory then you can
use the following perl
script....
#!/usr/bin/perl
# rename: renames files according to the expr given on the command line.
# The expr will usually be a 's' or 'y' command, but can be any valid
# perl command if it makes sense. Takes a list of files to work on or
# defaults to '*' in the current directory.
# e.g.
# rename 's/\.flip$/.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 $PATH for convenience.
This tip generously supported by: dave.ruddle@siemens.co.uk
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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.
Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3458 - July 29, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Rename files script
If you want to rename files
in a directory then you can
use the following perl
script....
#!/usr/bin/perl
# rename: renames files according to the expr given on the command line.
# The expr will usually be a 's' or 'y' command, but can be any valid
# perl command if it makes sense. Takes a list of files to work on or
# defaults to '*' in the current directory.
# e.g.
# rename 's/\.flip$/.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
==========================================================================
Selasa, 28 Juli 2015
Unix Tip: BOURNE SHELL PSEUDO HASH TABLES
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3457 - July 28, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3457 - July 28, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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
==========================================================================
Senin, 27 Juli 2015
Unix Tip: BE A GURU - RTFM
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3456 - July 27, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3456 - July 27, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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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To Submit A Tip: http://www.ugu.com/sui/ugu/show?tip.today
==========================================================================
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
==========================================================================
Minggu, 26 Juli 2015
Unix Tip: ONE STEP AT A TIME WITH !!
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3455 - July 26, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3455 - July 26, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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
==========================================================================
Sabtu, 25 Juli 2015
Unix Tip: PRINTING WITH NO SPACE
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3454 - July 25, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3454 - July 25, 2015
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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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To Unsubscribe: http://www.ugu.com/sui/ugu/show?tip.unsubscribe
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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
==========================================================================
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