Unix Tip: AUTOMATICALLY SET DISPLAY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3314 - March 7, 2013

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AUTOMATICALLY SET DISPLAY

To set automatically the DISPLAY
variable after rlogin (csh):

if (`who am i | wc -w` > 5) then
setenv DISPLAY `who am i | cut -d"(" -f2 | cut -d")" -f1`:0.0
endif

May vary from flavor to flavor

This tip generously supported by: labrache@gaulois.cad.cea.fr




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Unix Tip: ANOTHER SORT BY FILE SIZE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3313 - March 6, 2013

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ANOTHER SORT BY FILE SIZE

To sort certain files in the directory and to show
the biggest file first, do

$ du -a | sort -n -r | more



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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: FILE CONSISTANCY CHECK

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3312 - March 5, 2013

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FILE CONSISTANCY CHECK


To check the number of feilds and the
consistancy of the file here is simple
command:

nawk -F "delimiter" '{print NF}' file_name|sort -u|more




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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: LOCK DOWN TELNET OR FTP

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3311 - March 4, 2013

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LOCK DOWN TELNET OR FTP

When inbound access isn't required into
a system deny users Telnet or FTP access
do the following:

vi /etc/inetd.conf

Comment the line starts with Telnet or
FTP. Save the file and exit.

Stop and start the inetd daemon now by
following commands:

/etc/rc.d/init.d/inet stop

/etc/rc.d/init.d/inet start

(Your flavor may be /etc/init.d)

Now on nobody can telnet or FTP to your
server from outside network.

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
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Unix Tip: TRACKING OF LOGINS AND LOGOUTS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3310 - March 3, 2013

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TRACKING OF LOGINS AND LOGOUTS


In the .login file add the commands:
------------------------------------

echo login time `date` >> .daylogs/masterlog

grep -i "sun" .daylogs/masterlog > .daylogs/sunday.log
grep -i "mon" .daylogs/masterlog > .daylogs/monday.log
grep -i "tue" .daylogs/masterlog > .daylogs/tuesday.log
grep -i "wen" .daylogs/masterlog > .daylogs/wensday.log
grep -i "thu" .daylogs/masterlog > .daylogs/thursday.log
grep -i "fri" .daylogs/masterlog > .daylogs/friday.log
grep -i "sat" .daylogs/masterlog > .daylogs/saturday.log


In the .logout file add this line
-----------------------------------

echo logout time `date`>> .daylogs/masterlog

This script assumes you have a hidden
directory called .daylogs this helps keep it
out of sight and away from prying eyes and
if you keep root ownership of the directory
change the mode to:

chmod 744 .daylogs

This will not allow anyone to get in to the
directory to look around.



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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: IRIX: CHECK FOR NEW CONFIGS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3309 - March 2, 2013

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IRIX: CHECK FOR NEW CONFIGS

SGI loves to try and simplify
your life with chkconfig switches
to toggle various services on
and off. After each upgrade,
DOUBLE check the chkconfig
switches. If something doesn't
work all of the sudden check
here.

For instance, tape drives in IRIX
are disabled by a default install.
To enable a tape subsystem:

# chkconfig ts on

# /etc/init.d/ts start



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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: OPERATING ON MULTIPLE FILES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3308 - March 1, 2013

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OPERATING ON MULTIPLE FILES

Have you ever felt the need to perform a
set of operations on multiple files
simultaneously???

Here is a solution for that.

For instance, if it is required to perform
multiple operations like searching a string
(using grep), and executing an awk or perl
script etc, etc. on not just one file but a
set of files, use the following commands at
the unix prompt:

$<: foreach i (<file_list>)
? echo $i
? grep <search_pattern> $i > tmp
? awk -f awk_script tmp >> report
? ....
? ....
? end
$<:

The files list in the brackets can be either

* Specifically mentioned

* A unix variable which contains a list of
file names. For instance, the variable
"p" can be assigned all the files starting
with string "data" as follows:
set p = (data*)
Other examples are:
set g = `grep -l "Startpoint" * `
or
set all = *
(This assigns all file names in the current
directory to the variable "all" )

And its usage with the "foreach" command will
be as follows:

$<: foreach i ($all)
.....
.....
end

This tip generously supported by: lakshmi@virtualipgroup.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
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