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			    **** wagoneers.com ****
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 note: most of these commands are for HP-UX
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|									      |
|									      |
|****** _things_to_do_with_awk__ ******					      |
|									      |
|****  check user id's and home directories  ****			      |
|									      |
|cat /etc/passwd | awk -F: '{print $3" " $6}' | sort > sorted.pass.3.6	      |
|									      |
|****  sort a password file in NIS  ****				      |
|									      |
|cat /var/yp/passwd | awk -F: '{print $3"  "$6"	 "$1}' | sort		      |
|									      |
|****  look for a process and kill it  ****				      |
|									      |
|									      |
|# looking for specific string in process, e.g. dial (from a failed ppp)      |
|ps -ef | grep dial | awk '{print "kill " $2}'				      |
|									      |
|IF IN A SCRIPT (pass it via a file):					      |
|ps -ef | grep dial | awk '{print "kill " $2}' > /tmp/killproc		      |
|sh /tmp/killproc							      |
|									      |
|**** SET DISPLAY in .profile (tested on Sun and HP) ****		      |
|who am i -R | tr -d [\(-\)] | awk '{print $NF}' | grep -v :0 | \	      |
|	awk '{print "export DISPLAY="$1 ":0"}' > /tmp/setdisplay		   |
|. /tmp/setdisplay							      |
|/usr/bin/env | grep DISPLAY						      |
|									      |
|NOTE:	ALWAYs look at Display setting, especially if you're moving	      |
|around and logging in and through other systems!  When using xterm	      |
|or other GUI tools, always launch with an ampersand (&) at the end	      |
|so you're able to kill it from jobs.  (jobs lists the processes	      |
|running in the background, kill %# - #=job number)			      |
|									      |
|(HP-UX 11i on an 800 series wanted env fully resolved /usr/bin/env)	      |
|**** test login against current userid ****				      |
|if [ `who am i | awk '{print $1}'`=`whoami`]				      |
|then									      |
|blah;blah								      |
|exit;exit								      |
|fi									      |
|									      |
|**** more real life examples ****					      |
|									      |
|to change user "luser"'s group from "lgroup" to "othergrp"		      |
| -----------------------------------------------------			      |
|root@server [/home/files]						      |
|									      |
|ll | grep luser | grep lgroup | awk '{print "chown luser:othergp" " " $9}' > |
|list									      |
|chmod 700 list								      |
|./list									      |
|									      |
|									      |
|=============================================================================|
|**** test to force an su login ****					      |
|case `/usr/bin/who am i | awk '{ print $1 }'` in			      |
|    userid)  if [ `/usr/bin/who am i | awk '{ print $1 }'` = `/usr/bin/      |
|whoami` ]								      |
|		 then							      |
|		 echo "################no#login#########################"     |
|		 exit;exit						      |
|		 fi;;							      |
|esac									      |
|									      |
|									      |
|NOTE:	userid is login name that can not login directly		      |
|=============================================================================|
|***** root-#->HOW-TO-CLEAR-A-USER *****				      |
|# handy way to clear dead sessions and ALL activities of a user	      |
|#  or a process.  Puts the kill on each line.				      |
|#									      |
|# ps -ef | grep userid > nuke.userid					      |
|# cat nuke.userid | awk '{ print "kill -9 " $2 }' > nuke		      |
|# more nuke								      |
|# sh nuke								      |
|									      |
|# w									      |
|=============================================================================|
|									      |
|******	 to view a specific field ******				      |
|									      |
|awk -F: '{ if ($2 == "") print $1 }' /etc/passwd			      |
|awk -F: '{ if ($3 == 0) print $1}' /etc/passwd				      |
|									      |
|=============================================================================|
|									      |
|******	 find all files and other stuff ******				      |
|									      |
|									      |
|/usr/bin/find / -user root -perm -4000 -print | tee -a /root/suid.files      |
|									      |
|(also: can use ncheck to check for suid  or				      |
|   /dev/kmem to check perms						      |
|   /etc/securetty - restricts root login				      |
|   COPS - Computer Oracle & Password System				      |
|   strings may be used to view files					      |
|   Tripwire)								      |
|									      |
|****  an odd ball task solved by AWK  ****				      |
|									      |
|***** THE PROBLEM:    *****						      |
|									      |
|     I had a bunch of email addresses from a recent microslop virus problem  |
|   that I needed to sort out onto one line each.   I tried to replace the    |
|   comma separator with a newline using sed within vi, and at the command    |
|  line with little success.  Didn't have my Perl notes with me, so, I worked |
|it									      |
|  this way, convoluted as it may be... ;)				      |
|									      |
|*****	the solution *****						      |
|									      |
|									      |
|cat emails | awk -F , '{print $1}' > email1				      |
|cat emails | awk -F , '{print $2}' > email2				      |
|cat email2 >> email1							      |
|mv email1 list-o-emails						      |
|									      |
|_____________________________________________________________________________|

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