Commands using grep (1,935)
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Good for finding outdated timthumb.php scripts which need to be updated, anything over 2.0 should be secure, below that timthimb is vulnerable and can be used to compromise your website. Show Sample Output
-3find `pwd` -type f \( -iname thumb.php -or -iname timthumb.php \) -exec grep -HP 'define ?\(.VERSION' {} \; -
I alias this as "tach": alias tach='screen -x `screen -ls | grep Detached | cut -c -10`' If you have several detached sessions it will just grab the first one. If you're running nested screens you can open new outer windows and run tach repeatedly to grab all the detached sessions into that one. Show Sample Output
-3screen -x `screen -ls | grep Detached | cut -c -10` -
-3ifconfig | grep "inet addr" | cut -d":" -f2 | cut -d" " -f1
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-3alias myip='curl -s http://checkrealip.com/ | grep "Current IP Address"'
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-3wb(){ for i in $(wget -O- -U "" "http://wallbase.cc/random/23/eqeq/1920x1080/0/" --quiet|grep wallpaper/|grep -oe 'http://wallbase.[^"]*'); do if (( n > "$1" )); then break;fi;let n++;wget $(wget -O- -U "" $i --quiet|grep -oe 'http://[^"]*\.jpg');done;}
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-3grep -H -r "string" ./* >> grep.txt
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-3more blast.out| grep virus | awk '{print $1}' > virus_id.txt
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greps your bash history for whatever you type in at the end returning it in reverse chronological order (most recent invocations first), should work on all distros. works well as an alias
-3tac ~/.bash_history | grep -w -
After this command you can review doit.sh file before executing it. If it looks good, execute: `. doit.sh`
-3find . | xargs grep -l "FOOBAR" | awk '{print "rm -f "$1}' > doit.sh -
* = where
-4grep -lir "text to find" * -
-4ls -F | grep '\''\*'\'' | sed '\''s/\*$//'\
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changes the PS1 to something better than default. [username.hostname.last-2-digits-of-ip] (current directory) Show Sample Output
-4newhostname=$(hostname | awk -F. '{print $1 "." $2}'); ipaddress=$(nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F. '{print $3 "." $4}' | grep -v 64.142);PS1="[`id -un`.$newhostname.$ipaddress]"' (${PWD}): '; export PS1 -
Searching for a String in Multiple Files With Grep Show Sample Output
-4grep -iR find_me ./ -
-4export IFS=$'\n';for dir in $( ls -l | grep ^d | cut -c 52-);do du -sh $dir; done
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It extracts X number of lines from file1 and dumps them to file2.Using grep with the empty string '' extracts the complete lines (i.e. no filtering takes place) and the -m flag indicates how many lines to extract out from the given file. Then using the redirect > operator we send the extracted lines to a new file.
-4grep '' -m X file1 > file2 -
This is useful for remove all packages that are part of a common suite.
-4yum erase `yum list installed | grep 'php'` -
Useful for removes a package and its depends, for example to remove the gnome desktop environment, also configuration files will be removed, you should be carefully and sure that you want to do this. Show Sample Output
-4sudo apt-get remove --purge `dpkg -l | awk '{print $2}' | grep gnome` && apt-get autoremove -
This command might not be useful for most of us, I just wanted to share it to show power of command line. Download simple text version of novel David Copperfield from Poject Gutenberg and then generate a single column of words after which occurences of each word is counted by sort | uniq -c combination. This command removes numbers and single characters from count. I'm sure you can write a shorter version. Show Sample Output
-4wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed '1,419d' | tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk 'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}' -
A good way to understand what you've let yourself in for. Potential project metric could be the count:
svn log | grep -c "bodge\|fudge\|hack\|dirty"-4svn log | grep "bodge\|fudge\|hack\|dirty" -
-4ps aux | grep -v `whoami`
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-4tokill=`ps -fea|grep process|awk '{ printf $2" "}'`; kill -9 $tokill;
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The -p parameter tell the netstat to display the PID and name of the program to which each socket belongs or in digestible terms list the program using the net.Hope you know what pipe symbol means! Presently we wish to only moniter tcp connections so we ask grep to scan for string tcp, now from the op of grep tcp we further scan for regular expression /[a-z]*. Wonder what that means ? If we look at the op of netstat -p we can see that the name of the application is preceded by a / ( try netstat -p ) so,now i assume application name contains only characters a to z (usually this is the case) hope now it makes some sense.Regular expression /[a-z]* means to scan a string that start with a / and contains zero or more characters from the range a-z !!. Foof .. is t Show Sample Output
-4while true; do netstat -p |grep "tcp"|grep --color=always "/[a-z]*";sleep 1;done -
Well this can come handy , when you don't feel like playing with pid rather if you know the process name say "firefox",it would kill it.The script given below would kill the process with its name given as first parameter , though not robust enough to notify that process doesn't exist , well if you know what you are doing that's wouldn't be a problem.:) ---- killhim.sh ---- #!/bin/bash ps -u $USER |grep $1 | awk '{ print $1}'| xargs kill ----
-4ps -u $USER |grep $1 | awk '{ print $1}'| xargs kill -
-4ps aux | grep process-name | grep -v "grep"
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-4ps aux | grep [c]ommandname
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