Commands using grep sorted by votes

Commands using grep (1,935)

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dpkg - undo selection of installed packages for deinstall

If you run dpkg --clear-selections or have otherwise selected installed packages for deinstall, but want to undo it, run this. It will set all installed packages back to installed status so that they won't be removed by commands like "dpkg -Pa"
This is sample output - yours may be different.
0

dpkg -l | grep ^ri | awk '{print $2 " install"}' | sudo dpkg --set-selections

ajmccluskey · 2013-11-23 06:41:18 14
Remove all older kernels then the current running kernel for Ubuntu/Debian base system
This is sample output - yours may be different.
0

export KEEP_KERNEL=2; dpkg -l 'linux-image*' | awk '/^ii/ { print $2 }' | grep "[0-9]" | awk 'BEGIN{i=1}{print i++, $0}' | grep `uname -r` -B99 | sort -r | tail -n+$(($KEEP_KERNEL+2)) | awk '{print $2}'| xargs apt-get -y purge

The_IceMan_Blog · 2013-11-23 15:35:42 7
Kill all processes found in grep

Kills all processes with a certain string. This was done to kill all ssh sessions openned by zenoss which look like: usr/bin/ssh /opt/zenoss/bin/zenmodeler
This is sample output - yours may be different.
0

for line in `ps aux | grep <string> | awk '{print $2}'`; do sudo kill $line; done;

mjbrune · 2013-11-24 00:02:16 17
Search history, return unique results
This is sample output - yours may be different.
0

function hgr() { grep --color -i "${1}" ~/.bash_history | sed -e 's/^ *//g' -e 's/ *$//g' | sort | uniq; }

doge · 2013-11-27 16:54:02 7
Gets the X11 Screen resolution
This is sample output - yours may be different.
0

xdpyinfo | grep dimensions | awk '{print $2}'

sgnn7 · 2013-12-06 17:49:40 6
count match string lines from file(s)

-c will count the number of times your search matches in the file. Show Sample Output
This is sample output - yours may be different.
```
$ cat file.txt
hello
goodbye
hello
$
$ grep -c "hello" file.txt
2
$
```
0

grep -c "search_string" /path/to/file

meatflag · 2013-12-10 18:13:54 7
List all bash shortcuts

Shows all available keyboard bindings in bash. Pretty printing. Show Sample Output
This is sample output - yours may be different.
```
abort                                     "\C-g", "\C-x\C-g", "\e\C-g".
accept-line                               "\C-j", "\C-m".
backward-char                             "\C-b", "\eOD", "\e[D".
backward-delete-char                      "\C-h", "\C-?".
...
```
0

bind -P | grep -v "is not" | sed -e 's/can be found on/:/' | column -s: -t

leni536 · 2013-12-19 12:30:19 8
Count music files in each directory

This lists the number of ogg/mp3/wav/flac files in each subdirectory of the current directory. The output can be sorted by piping it into "sort -n". Show Sample Output
This is sample output - yours may be different.
```
9955 .
82 ./16 Horsepower
17 ./17 Hippies
11 ./Abney Park
44 ./AC DC
10 ./Accept
1 ./Acceptance
9 ./Adiemus
6 ./Bran? Ketern?
10 ./Budapest Gypsy Symphony Orchestra
20 ./Budapester Klezmer Band
35 ./Buena Vista Social Club
12 ./Burlap To Cashmere
```
0

find . -type d -maxdepth 1 -print0 | xargs -0 -I{} sh -c 'find "{}" -type f | grep "ogg\|mp3\|wav\|flac$" | wc -l | tr -d "\n"; echo " {}"'

dbrgn · 2013-12-22 13:40:29 11
Show total cumulative memory usage of a process that spawns multiple instances of itself

This command will show the sum total of memory used in gigabytes by a program that spawns multiple instances of itself. Replace chrome with whatever program's memory usage you are investigating. This command is rather useless on software that only spawns a single instance of itself. Show Sample Output
This is sample output - yours may be different.
```
6.6
```
0

ps -eo pmem,comm | grep chrome | cut -d " " -f 2 | paste -sd+ | bc

Darkstar · 2014-01-03 15:33:16 11
Check fstab volumes and volumes mounted.

With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.
This is sample output - yours may be different.
0

diff <(cat /etc/fstab | grep vol | grep -v "^#" | awk '{print $1}') <(df -h | grep vol)

Koobiac · 2014-01-23 15:18:08 11
grep BTC last trading price from BTC-E, but u can change it.. they got em all

Show Sample Output
This is sample output - yours may be different.
```
719.00
```
0

wget -q -O- http://bitinfocharts.com/markets/btc-e/btc-usd.html |grep -o -P 'lastTrade">([0-9]{1,})(.){0,1}[0-9]{0,}' |grep -o -P '(\d)+(\.){0,1}(\d)*' |head -n 1

peter1337 · 2014-01-25 23:40:00 20
Get block device mapped parent PCI controller

Maps block devices to the PCIe nodes
This is sample output - yours may be different.
0

udevadm info -q all -n /dev/sdb | grep ID_PATH | cut -d'-' -f 2 | xargs -n 1 lspci -s

bp · 2014-02-18 06:23:39 7
Show concurrent memory usage for individual instances of an application

Displays memory usage for individual instances of an application that spawns multiple instances of itself. This command also works on single process applications. Show Sample Output
This is sample output - yours may be different.
```
0.6 chrome
0.0 chrome
0.0 chrome-sandbox
0.2 chrome
0.1 chrome
0.6 chrome
```
0

ps -eo pmem,comm | grep application-name

Darkstar · 2014-02-23 13:21:29 6
adb connect to last IP address

Connects to the last adb connection in history. Show Sample Output
This is sample output - yours may be different.
```
success:
adb connect 10.10.20.6

fail:
unable to connect to 10.10.20.6:5555
```
0

eval $(history | cut -c 8- | grep "adb connect [0-9]" | tail -1)

CanOrhan · 2014-02-27 14:44:27 7
look some php code by some keywords

Another way to view some code by keyword and basic regular expression
This is sample output - yours may be different.
0

locate *\\.php|xargs grep --color=always -i -5 "namespace\s.*\W"|less

unixmonkey14859 · 2014-02-28 13:52:15 7
Remap Nic aliases from PCI location

for redhat systems works sometimes :S tested on dell poweredge r7+ systems
This is sample output - yours may be different.
0

lspci -vv | grep 'Ethernet\|Serial' | awk 'NR == 1{ printf $1 } NR == 2 { print " mac " $7 }' | sed ?e 's/-/:/g' -e 's/:f[ef]:f[ef]//g' -e 's/01:00.0/eth0/g' -e 's/01:00.1/eth1/g' -e 's/01:00.2/eth2/g' -e 's/01:00.3/eth3/g' > /etc/iftab && ifrename

PROJAK_SX · 2014-03-01 20:07:18 6
look some php code by some keywords

Actually grep can do recursive search based on file extensions.
This is sample output - yours may be different.
0

grep -r --include=*.php "something" /foo/bar

avpod2 · 2014-03-07 13:26:12 7
truncate deleted files from lsof

Be careful, first run: lsof | grep -i deleted | grep REG | grep -v txt Then, give it the boot!
This is sample output - yours may be different.
0

lsof | grep -i deleted | grep REG | grep -v txt | ruby -r 'pp' -e 'STDIN.each do |v| a = v.split(/ +/); puts `:> /proc/#{a[1]}/fd/#{a[3].chop}`; end'

jim80net · 2014-03-11 06:02:09 7
List the busiest websites on a cPanel server

Easiest way to obtain the busiest website list (sorted by number of process running). Show Sample Output
This is sample output - yours may be different.
```
# /usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | grep GET | awk '{print $12}' | sort | uniq -c | sort -rn | head
     17 website899.com
     11 website2.com
      7 website4.com
      7 website8.com
      7 website3.com
      7 website5.com
      6 website7.com
      6 website6.com
      5 website9.com
      5 website79.com
```
0

/usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | grep GET | awk '{print $12}' | sort | uniq -c | sort -rn | head

copocaneta · 2014-03-12 12:31:34 7

List the busiest script running on a cPanel server (showing domain)

List the busiest scripts/files running on a cPanel server with domain showing (column $12). Show Sample Output

/usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | grep GET | awk '{print $12 $14}' | sort | uniq -c | sort -rn | head

copocaneta · 2014-03-12 13:24:40 8

get Windows OS architecture using Cygwin

Using "wmic get * /value" within any Cygwin shell will return lots of Win/Dos newline junk ie "^M$" at the end of found value line, two lines ("$" Unix newline) above, and three below. This makes storing and or evaluating wmic queries as variables a pain. The method i suggest strips the mentioned junk, only returns the value after "OSArchitecture=", and includes only one Unix style newline. Other methods using sed|awk|cut can only handle the output of wmic cleanly when piped or using multiple sed statements. wmic OS get OSArchitecture /value | sed 's/\r//g;s/^M$//;/^$/d;s/.*=//' making wmic OS get OSArchitecture /value | grep -Eo '[^=]*$' a much cleaner and slightly less costly alternative. Show Sample Output
This is sample output - yours may be different.
```
64-bit
```
0

wmic OS get OSArchitecture /value | grep -Eo '[^=]*$'

lowjax · 2014-03-15 02:04:08 13
Get a PostgreSQL servers version

In a multiple PostgreSQL server environment knowing the servers version can be important. Note that psql --version returns just the local psql apps version which may not be what you want. This command dumps the PostgreSQL servers version out to one line. You may need to add more command line options to the psql command for your connection environment. Show Sample Output
This is sample output - yours may be different.
```
PostgreSQL 9.3.3 on x86_64-redhat-linux-gnu, compiled by gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7), 64-bit
```
0

psql -h <SERVER NAME HERE> -c 'SELECT version();' | grep -v 'version\|---\|row\|^ *$' | sed 's/^\s*//'

pnelsonsr · 2014-03-17 18:36:40 7
Search for string through files

Grep can search files and directories recursively. Using the -Z option and xargs -0 you can get all results on one line with escaped spaces, suitable for other commands like rm. Show Sample Output
This is sample output - yours may be different.
```
# Write results to file:
grep -Rl --exclude "files.txt" "pattern" files_or_dir > files.txt

# Remove all found files:
grep -RlZ | xargs -0 rm
```
0

grep -Rl "pattern" files_or_dir

N1nsun · 2014-04-06 18:18:07 7
Download German word pronounciation as mp3 file
This is sample output - yours may be different.
0

for w in [WORT1] [WORTn]; do wget -O $w.mp3 $(wget -O - "http://www.duden.de/rechtschreibung/$w" | grep -o "http://www.duden.de/_media_/audio/[^\.]*\.mp3"); done

nk23x1 · 2014-04-11 20:03:30 6
Check SSH fingerprints

Find all private keys and dump their fingerprints. Show Sample Output
This is sample output - yours may be different.
```
id_rsa: 2048 aa:bb:cc:dd:ee:ff:00:11:22:33:44:55:66:77:88:99  id@base-id (RSA)
other: 2048 00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff  id@OTHER.com (RSA)
```
0

for id in `ls -1 ~/.ssh | grep -v "authorized\|known_hosts\|config\|\."` ; do echo -n "$id: " ; ssh-keygen -l -f .ssh/$id ; done

drockney · 2014-04-16 14:12:20 25
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Read funny developer comments in the Linux source tree

These are way better than fortune(6).

Show git branches by date - useful for showing active branches

This fixes a bug found in the other scripts which fail when a branch has the same name as a file or directory in the current directory.

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"

List out classes in of all htmls in directory

Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box) WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

Generate a 18 character password, print the password and sha512 salted hash

Generate a 18 character password from character set a-zA-Z0-9 from /dev/urandom, pipe the output to Python which prints the password on standard out and in crypt sha512 form.

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

live netcat network throughput test

On the another machine write this command. pv -r /dev/zero | nc 192.168.1.1 7777 It will show live throughput between two machine.The destination machine ip is at our example 192.168.1.1 You must multiply by 8 for the network calculation. You must install pv and netcat commands for this commands usage. kerim@bayner.com http://www.bayner.com/

How to copy CD/DVD into hard disk (.iso)

A dear friend of mine asked me how do I copy a DVD to your hard drive? If you want to make a copy of the ISO image that was burned to a CD or DVD, insert that medium into your CD/DVD drive and (assuming /dev/cdrom is associated with your computer?s CD drive) type the following command

Get a process's pid by supplying its name

Print a row of 50 hyphens

This feels more intuitive to me.

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Commands using grep (1,935)

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