Commands using awk (1,418)
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grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}' OR awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}' In this example, we are having a text file that is having several entries like: --- c1 c2 c3 c4 this is some data HOME /dir1/dir2/.../dirN/somefile1.xml HOME /dir1/dir2/somefile2.xml some more data --- for lines starting with HOME, we are extracting the second field that is a 'file path with file name', and from that we need to get the filename only and ignore the slash delimited path. The output would be: somefile1.xml somefile2.xml (In case you give a -ive - pls give the reasons as well and enlighten the souls :-) )
-3grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}' OR USE ALTERNATE WAY awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}' -
Replace FILE with a filename (or - for stdin).
-3awk 'BEGIN {srand()} {print int(rand()*1000000) "\t" $0}' FILE | sort -n | cut -f 2- -
This will, for an application that has already been removed but had its configuration left behind, purge that configuration from the system. To test it out first, you can remove the last -y, and it will show you what it will purge without actually doing it. I mean it never hurts to check first, "just in case." ;)
-3dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | xargs aptitude purge -y -
-3TIMEUNIT=$( cat a | grep -n "timescale" | awk -F ":" '{ print $1 } ' )
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ls -l may vary depending on operating system, so "print $8" may have to be changed
-3ls -l `ls -l |awk '/^l/ {print $8}'` -
For disk space constraint testing. Leaves a little space available for creating temp files, etc. Easily free up the used disk space again by deleting the dummy00 file. Can tailor the testing by building smaller 'blocks' to suit the needs of the testing. WARNING: do not do this to the '/' (root) filesystem unless you know what you are doing... on some systems it could crash the OS.
-3dd if=/dev/zero of=/fs/to/fill/dummy00 bs=8192 count=$(df --block-size=8192 / | awk 'NR!=1 {print $4-100}') -
grabs your local IP Address. Show Sample Output
-3ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}' -
-3awk '/inet end/ {print $3}' <(ifconfig eth0)
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This command toggles the touchpad on and off, when it's on, the right side scroll strip (annoying) and the tap-clicking are disabled, you can change this by changing occurances of 2 in the command to 0. this whole command can then be given a keyboard shortcut so that the touchpad is disableable without using a special fn key (which linux doesn't recognize on some computers) or a seperate button.
-3if [ $(synclient -l | grep TouchpadOff | awk '{print $3}') = "2" ]; then synclient TouchpadOff=1; elif [ $(synclient -l | grep TouchpadOff | awk '{print $3}') == "1" ]; then synclient TouchpadOff=2; else synclient TouchpadOff=2; fi -
-3ifconfig | awk '/inet addr/ &&! /127.0.0.1/{ gsub(/addr:/,""); print $2 }'
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gets the last number of the mac address to use it for other stuff Show Sample Output
-3UNIQUE_BY_MAC=$(ifconfig |grep eth0|awk '{ print strtonum("0x"substr($6,16,2)) }') -
-3ps ux|grep <process name>|awk '{print $2}'|xargs -n 1 kill
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This will get the mac address of the eth0 and change lowercase to uppercase. The sed command removed the colons.
-3ifconfig eth0 | grep 'HWaddr' | awk '{print $5}' | tr 'a-z' 'A-Z' | sed -e 's/://g' -
-3netstat -l -p --tcp | egrep -e 'www.*[0-9]{3,4}\/(apache2|httpd)' | awk '{print$7}'
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-3TODAY=`date +"%b %d"`;ls -l | grep "$TODAY" | awk '{print $9}'
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-3echo $EPOCH|awk '{print strftime("%c",$1)}'
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most usefull when creating batch scripts using several usb drives and some commands like mkntfs needs a device name the -w option for grep is here to filter lines when you have multiple drives with the same volume label. Without this option, the grep command will return /media/KINGSTON /media/KINGSTON_ /media/KINGSTON__ Show Sample Output
-3df | grep -w /media/KINGSTON | awk {'print $1'} -
Get external IP of the current machine via http://cmyip.com Show Sample Output
-3wget http://cmyip.com -O - -o /dev/null | awk '/\<title/ {print $4}' -
-3ls -alt /directory/ | awk '{ print $6 " " $7 " -- " $9 }'
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-3awk '{total+=$0}END{print total}' file
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I use this command to select a random movie from my movie collection.. Show Sample Output
-3ls -1 | awk 'BEGIN{srand()} {x[NR] = $0} END{print "Selected", x[1 + int(rand() * NR)]}' -
-3MyVAR=84; awk '{ print "'"$MyVAR"'" }'
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when you can do it , avoid pipe Show Sample Output
-3awk '{ printf "%.2f", $2/1024/1024 ; exit}' /proc/meminfo -
* ps -ef # list running processes * grep string * pull the process names from 8th field * cut and delimiter '/' * print 4th field * get rid of trailing grep * for loop killall -9 $i which is the process name Show Sample Output
-3for i in `ps -ef | grep tracker | awk '{print $8}' | cut -d'/' -f4 | grep -v grep`; do killall -9 $i; done -
-3more blast.out| grep virus | awk '{print $1}' > virus_id.txt
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