Unix Tip: BACKUP THE REMOTE ESSENTIALS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3246 - December 25, 2008

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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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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: STRING REMOVAL

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3245 - December 24, 2008

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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
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Unix Tip: KILLING MORE USERS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3244 - December 23, 2008

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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: CHMOD THE SYSTEM

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3222 - December 1, 2008

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

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CHMOD THE SYSTEM

Along the lines of:

D O N O T D O T H I S!

Reports from several admins have been made that dangerous users who obtain root for the first time enable full access to the entire system. They are using the following command:

# chmod -R 777 /

If you feel you have any dangerous users, please advice them of the dangers of executing such a command.

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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: ALTERNATIVE TO CP

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3163 - October 3, 2008

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ALTERNATIVE TO CP

Define the following alias:

tar cvf - . | ( cd \!* ; tar xvf - )

or as an alias:

alias cpbytar 'tar cvf - . | ( cd \!* ; tar xvf - )'
(The alias definition above is for CSH)

To do a recursive copy of a directory to another location, preserving the PERMISSIONS and OWNERSHIP of the files. "cd" to the source location and invoke the following alias

cpbytar <destination_directory>

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.

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

Unix Tip: EXTRACT CORRUPTED TAR FILE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3142 - September 12, 2008

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EXTRACT CORRUPTED TAR FILE

In many case if there is a corrupted tar file,
the following command can be used in an attempt
to extract the file:

% cat [tar-filename] | tar -xvf -

NOTE: Where "-" is the STDOUT

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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 A LARGE NUMBER OF FILES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3131 - September 1, 2008

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

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RENAME A LARGE NUMBER OF FILES

This a an oldie but a goodie. There always comes a time when a large number of files need to be renamed.

Here is one quick way to do it:

=================== cut here ===========================

#!/bin/sh

for i in *
do
echo $i
mv $i `basename $i`.bak
done

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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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