Commands using grep sorted by votes

Commands using grep (1,935)

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Command to get list of all existing programming languages from Wikipedia article

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
This is sample output - yours may be different.
```
R (programming language)
R++
Racket (programming language)
RAPID
Rapira
Ratfiv
Ratfor
Rc
REBOL
Core War
REFAL
Reia (programming language)
Revolution (programming language)
Rex (language)
REXX
Rlab
ROOP (programming language)
IBM RPG
RPL (programming language)
Robot Battle
RTL/2
Ruby (programming language)
Rust (programming language)
```
0

curl http://en.wikipedia.org/wiki/List_of_programming_languages | grep "<li>" | awk -F"title=" '{ print $2 }' | awk -F\" '{ print $2 }'

sxiii · 2013-01-09 21:40:11 11
Grep recursively your Python project with color highlighting the result and line numbers
This is sample output - yours may be different.
0

grep --color=always -nr 'setLevel' --include=*py | less -SRqg

manuq · 2013-01-10 03:10:10 8
Search in files

search content in files Show Sample Output
This is sample output - yours may be different.
```
'cashbox_line_ids' : fields.one2many('account.journal.cashbox.line', 'journal_id', 'CashBox'),
class account_journal_cashbox_line(osv.osv):
    _name = 'account.journal.cashbox.line'
account_journal_cashbox_line()
```
0

grep -i -h 'account.journal.cashbox.line' *.py

tejastank · 2013-01-23 06:44:45 4
The letter your commands most often start with

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
This is sample output - yours may be different.
```
685 s
255 g
251 c
193 l
130 p
83 n
81 m
70 r
56 d
24 u
23 a
22 t
14 i
14 h
13 f
11 o
7 e
4 w
4 v
4 j
3 k
3 b
1 x
0 z
0 y
0 q
```
0

for i in {a..z}; do echo $(cat ~/.bash_history | grep ^$i.* | wc -l) $i; done | sort -n -r

yaMatt · 2013-01-23 18:59:13 4
How to find all open files by a process in Solaris 10

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
This is sample output - yours may be different.
```
user@machine# for i in `pfiles 25925|grep S_IFREG|awk '{print $5}'|awk -F":" '{print $2}'`; do find /path/tmp -inum $i |xargs ls -lah; done
-rw-r--r-- 1 user group 910 Jan 26  2012 /path/tmp/file1.prm
-rw-rw-rw- 1 user group 6.3K Jan 20 06:30 /path/tmp/file2.rpt
-rw-r--r-- 1 user group 86K Jan 23 23:34 /path/tmp/file3.log
-rwxrw-r-- 1 user group 65 Dec 26 07:27 /path/tmp/file4.pcr
```
0

for i in `pfiles pid|grep S_IFREG|awk '{print $5}'|awk -F":" '{print $2}'`; do find / -inum $i |xargs ls -lah; done

giorger · 2013-01-24 13:57:19 4
shows whether your CPU supports 64bit mode

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?
This is sample output - yours may be different.
0

grep -q ' lm ' /proc/cpuinfo; [ $? -eq 0 ] && echo '64bit supported'

mzet · 2013-01-24 21:41:56 4

Find stock debian package config files that have been modified since installation

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

dpkg-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':'

hallmarc · 2013-01-31 16:52:38 10

Count open file handles for a specific user ID
This is sample output - yours may be different.
0

for x in `ps -u 500 u | grep java | awk '{ print $2 }'`;do ls /proc/$x/fd|wc -l;done

akashrpatel · 2013-02-02 20:29:31 5
Count total processes for specific program and user
This is sample output - yours may be different.
0

ps -u user_name_here | grep process_name_here | wc -l

TuxLyn · 2013-02-07 01:46:29 8
Remaining Disk space for important mounted drives
This is sample output - yours may be different.
0

df -H | grep -vE '^Filesystem|tmpfs|cdrom|none' | awk '{ print $5 " " $1 }'

leonteale · 2013-02-07 19:01:27 4
diff files ignoring comments and blank lines (lines starting with #)

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.
This is sample output - yours may be different.
0

diff -u <(grep -vE '^(#|$)' file1) <(grep -vE '^(#|$)' file2)

taintedkernel · 2013-02-12 13:59:39 38
copy zip files which contains XXX
This is sample output - yours may be different.
0

for i in *RET.zip; do unzip -l "$i"| grep -B 4 XXX | grep RET| sed "s/.\+EPS/EPS/" |xargs -I '{}' cp '{}' out/'{}';done;

tsonkomirchev · 2013-02-13 17:24:37 5
Purge completely packages on debian / ubuntu

completely remove those packages that leave files in debian / ubuntu marked with rc and not removed completely with traditional tools
This is sample output - yours may be different.
0

dpkg -l | grep ^rc | awk '{ print $2}' | xargs apt-get -y remove --purge

Richzendy · 2013-02-15 01:34:37 7
Check if *hardware* is 32bit or 64bit

Avoids cat abuse ;)
This is sample output - yours may be different.
0

grep " lm " /proc/cpuinfo > /dev/null && echo "64-bit" || echo "32-bit"

MrCode · 2013-02-19 21:40:44 4
Order all files oldest to newest then get the last one touched

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.
This is sample output - yours may be different.
0

ls -lT -rt | grep "^-" | awk 'BEGIN {START=2002} (START <= $9){ print $10 ;START=$9 }' | tail -1

Glamdring · 2013-02-24 23:39:22 7
Kill a lot of process once a time
This is sample output - yours may be different.
0

ps aux | grep <process> | grep -v grep | awk '{print $2}' | xargs -i -t kill -9 {}

szimbaro · 2013-02-27 12:33:30 4
Show alive host on network
This is sample output - yours may be different.
0

nmap -sP 192.168.0.* | grep Host | tr "(" ")" | cut -d\) -f2

szimbaro · 2013-02-27 12:40:45 4
to remove blank line
This is sample output - yours may be different.
0

grep . filename >filename1

mervin123 · 2013-03-01 10:55:18 4
Show reason of revocation for 0xDEADBEEF with gpg.

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
This is sample output - yours may be different.
```
:signature packet: algo 1, keyid DEADBEEFDEADBEEF
	version 4, created 1361391004, md5len 0, sigclass 0x20
	digest algo 8, begin of digest ef ce
	hashed subpkt 2 len 4 (sig created 2013-02-20)
	hashed subpkt 26 len 21 (policy: http://example.net/policy)
	hashed subpkt 29 len 23 (revocation reason 0x01 (I felt funny and wanted to revoke this key))
	subpkt 16 len 8 (issuer key ID DEADBEEFDEADBEEF)
	data: [4093 bits]
```
0

gpg --export 0xDEADBEEF | gpg --list-packets | grep -Pzao ':signature packet:.*\n\t.*sigclass 0x20(\n\t.*)*'

claudius · 2013-03-05 14:11:11 5

Get a list of HTTP status codes

When you need a quick ref guide while troubleshooting Apache|NGINX error|access logs. Show Sample Output

curl 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

klg · 2013-03-06 01:49:08 10

extract only the subroutine names from a perl script

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
This is sample output - yours may be different.
```
routine_alpha
routine_bravo
routine_charlie
```
0

grep -Po '^sub (\w+)' file.pm | cut -d' ' -f2

unixmonkey39631 · 2013-03-07 12:31:34 7
Amount of physical memory in HP-UX

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
This is sample output - yours may be different.
```
user@hpuxhost:/home/user# machinfo | grep -i memory
Memory: 130938 MB (127.87 GB)
```
0

machinfo | grep -i memory

giorger · 2013-03-07 16:22:49 12
find str in in a directory which file extension is .php
This is sample output - yours may be different.
0

find ./ -type f -name "*.php" | xargs grep -n "name" -r {}

motopig · 2013-03-08 11:03:49 4

list directories only

Long listing alternative Show Sample Output

ls -l | grep ^d

Rodia · 2013-03-09 10:16:10 4

Find .jpg file that is actually thumbs.db

Created to deal with an overzealous batch rename on our server that renamed all files to .jpg files.
This is sample output - yours may be different.
0

file -i `find . -name '*.jpg' -print` | grep "application/msword"

genghisdani · 2013-03-10 16:53:23 6
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Detach a process from the current shell

ignore HUP interruptions

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

shuffle lines via perl

Same, without modules... Probably smarter option: just use the shuf command or even sort -R.

Shows how many percents of all avaliable packages are installed in your gentoo system

(Debian/Ubuntu) Discover what package a file belongs to

Works similar to dpkg -S, but uses the locatedb and is thus inarguably a lot faster - if the locatedb is current.

Terrorist threat level text

This line provides the same result by reading the output of a less arbitrary value. This is a personal choice on the matter, and the result on different machines may vary.

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

dstat - a mix of vmstat, iostat, netstat, ps, sar...

This is a very powerful command line tool to gather statistics for a Linux system. http://dag.wieers.com/home-made/dstat/

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Get info about remote host ports and OS detection

Where < target > may be a single IP, a hostname or a subnet -sS TCP SYN scanning (also known as half-open, or stealth scanning) -P0 option allows you to switch off ICMP pings. -sV option enables version detection -O flag attempt to identify the remote operating system Other option: -A option enables both OS fingerprinting and version detection -v use -v twice for more verbosity. $ nmap -sS -P0 -A -v < target >

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Commands using grep (1,935)

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