Commands using grep (1,935)
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Requirements: curl, grep, awk, internet connection with access to wikipedia Loaded page: http://en.wikipedia.org/wiki/List_of_programming_languages If you can make shorter version of this listgetter, you are welcome to paste it here :) Show Sample Output
0curl http://en.wikipedia.org/wiki/List_of_programming_languages | grep "<li>" | awk -F"title=" '{ print $2 }' | awk -F\" '{ print $2 }' -
0grep --color=always -nr 'setLevel' --include=*py | less -SRqg
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search content in files Show Sample Output
0grep -i -h 'account.journal.cashbox.line' *.py -
Kind of fun if you're that was inclined. I figured most of my commands start with s. sudo, screen, ssh etc. This script tells me what else they start with. Show Sample Output
0for i in {a..z}; do echo $(cat ~/.bash_history | grep ^$i.* | wc -l) $i; done | sort -n -r -
Executing pfiles will return a list of all descriptors utilized by the process We are interested in the S_IFREG entries since they are pointing usually to files In the line, there is the inode number of the file which we use in order to find the filename. The only bad thing is that in order not to search from / you have to suspect where could possibly be the file. Improvements more than welcome. lsof was not available in my case Show Sample Output
0for i in `pfiles pid|grep S_IFREG|awk '{print $5}'|awk -F":" '{print $2}'`; do find / -inum $i |xargs ls -lah; done -
it shows whether your CPU supports 64 bit (x86-64) mode. uname -a only shows whether you have 64 bit (x86-64) or 32bit (i386) OS installed, this one-liner answers question: Can I install 64bit OS on this machine?
0grep -q ' lm ' /proc/cpuinfo; [ $? -eq 0 ] && echo '64bit supported' -
This functionality seems to be missing from commands like dpkg. Ideally, I want to duplicate the behavior of rpm --verify, but it seems difficult to do this in one relatively short command pipeline. Show Sample Output
0dpkg-query -Wf '${Package}\n' | xargs dpkg --status | sed '/^Conffiles:/,/^Description:/!d;//d' | awk '{print $2 " " $1}' | md5sum -c 2>/dev/null | grep FAILED$ | cut -f1 -d':' -
0for x in `ps -u 500 u | grep java | awk '{ print $2 }'`;do ls /proc/$x/fd|wc -l;done
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0ps -u user_name_here | grep process_name_here | wc -l
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0df -H | grep -vE '^Filesystem|tmpfs|cdrom|none' | awk '{ print $5 " " $1 }'
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Runs a diff on two files ignore comments and blank lines (diff -I=RE does not work as expected). Adapted from a post found on stackexchange.
0diff -u <(grep -vE '^(#|$)' file1) <(grep -vE '^(#|$)' file2) -
0for i in *RET.zip; do unzip -l "$i"| grep -B 4 XXX | grep RET| sed "s/.\+EPS/EPS/" |xargs -I '{}' cp '{}' out/'{}';done;
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completely remove those packages that leave files in debian / ubuntu marked with rc and not removed completely with traditional tools
0dpkg -l | grep ^rc | awk '{ print $2}' | xargs apt-get -y remove --purge -
Avoids cat abuse ;)
0grep " lm " /proc/cpuinfo > /dev/null && echo "64-bit" || echo "32-bit" -
On the Mac, the 'ls' function can sort based on month/day/time, but seems to lack ability to filter on the Year field (#9 among the long listed fields). The sorted list continuously increases the 'START' year for the most recently accessed set of files. The final month printed will be the highest month that appeared in that START year. The command does its magic on the current directory, and suitably discards all entries that are themselves directories. If you expect files dating prior to 2002, change the START year accordingly.
0ls -lT -rt | grep "^-" | awk 'BEGIN {START=2002} (START <= $9){ print $10 ;START=$9 }' | tail -1 -
0ps aux | grep <process> | grep -v grep | awk '{print $2}' | xargs -i -t kill -9 {}
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0nmap -sP 192.168.0.* | grep Host | tr "(" ")" | cut -d\) -f2
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0grep . filename >filename1
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Shows a sigclass 0x20 (Key revocation) signature packet on a key, including all subpackets. Subpacket 2 is the date of revocation, subpacket 26 the relevant policy, subpacket 29 the reason of revocation (cf. http://rfc.askapache.com/rfc4880/rfc4880.html#section-5.2.3.23 ) and subpacket 16 the issuer of the revocation certificate (usually should be the same as the revoked key). Show Sample Output
0gpg --export 0xDEADBEEF | gpg --list-packets | grep -Pzao ':signature packet:.*\n\t.*sigclass 0x20(\n\t.*)*' -
When you need a quick ref guide while troubleshooting Apache|NGINX error|access logs. Show Sample Output
0curl http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 2>/dev/null | grep '^<h3' | grep -v '^\d' | perl -pe 's/^.*(?<=(\d\d\d)) (.*)<\/h3>$/$1 : $2/' | grep -v h3 -
instead of printing the whole line, print just the capture matched, but with the "cut" pipe :( I'm so sad with grep. Show Sample Output
0grep -Po '^sub (\w+)' file.pm | cut -d' ' -f2 -
Get the amount of physical memory in an HP-UX v11 OS when following are NOT available: - root account - no privileges in /proc - no privileges in /dev/mem Show Sample Output
0machinfo | grep -i memory -
0find ./ -type f -name "*.php" | xargs grep -n "name" -r {}
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Long listing alternative Show Sample Output
0ls -l | grep ^d -
Created to deal with an overzealous batch rename on our server that renamed all files to .jpg files.
0file -i `find . -name '*.jpg' -print` | grep "application/msword" - ‹ First < 45 46 47 48 49 > Last ›
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