Commands using grep sorted by votes

Commands using grep (1,935)

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list the top 15 folders by decreasing size in MB

I don't like doing a massive sort on all the directory names just to get a small set of them. the above shows a sorted list of all directories over 1GB. use head as well if you want. du's "-x" flag limits this to one file system. That's mostly useful when you run it on "/" but don't want "/proc" and "/dev" and so forth. Remember though that it will also exclude "/home" or "/var" if those are separate partitions. the "-a" option is often useful too, for listing large files as well as large directories. Might be slower.
This is sample output - yours may be different.
0

du -mx [directory] | grep -P '^\d{4}' | sort -rn

mc0e · 2013-05-24 09:52:41 6
extract email adresses from some file (or any other pattern)

The -a option in -aEio tells grep to treat binary files as text files. Show Sample Output
This is sample output - yours may be different.
```
foo@bar.com
bar@baz.com
```
0

grep -aEio '([[:alnum:]_.-]+@[[:alnum:]_.-]+?\.[[:alpha:].]{2,6})'

nabil_kadimi · 2013-05-30 07:17:32 9

View all file descriptors owned by a process

Inner "ps...grep..." command searches for a process matching the specified . "lsof -p lists all file descriptors owned by . Includes open files, sockets, devices, etc... Show Sample Output

sudo lsof -p `sudo ps aux | grep -i neo4j | grep -v grep | awk '{ print $2 }'`

andycunn · 2013-06-02 10:15:30 7

Show counts of messages in exim mail queue, grouped by recipient

Counts of messages by recipient, with frozen messages excluded. Show Sample Output
This is sample output - yours may be different.
```
      1 foo@example.com
      3 bar@example.org
    100 baz@example.net
```
0

sudo /usr/sbin/exim -bp | sed -n '/\*\*\* frozen \*\*\*/,+1!p' | awk '{print $1}' | tr -d [:blank:] | grep @ | sort | uniq -c | sort -n

blueskin · 2013-06-04 10:49:14 8
Less verbose CVS status (skips unmodified up-to-date files)

Show Sample Output
This is sample output - yours may be different.
```
? untrackedfile
File: localaddedfile    Status: Locally Added
File: needspatch        Status: Needs Patch
File: locallymodifiedfile       Status: Locally Modified
```
0

cvs -q status | grep ^[?F] | grep -v 'to-date'

blueskin · 2013-06-04 12:10:33 12
Svn conflicted file resolve
This is sample output - yours may be different.
0

svn st | grep ! | cut -c 9- | while read line;do svn resolved $line;done

rubyu2 · 2013-06-12 08:30:49 6
Exclude dumping of specific tables with same prefix from a single database

Required : information_schema ** Only replace the "DB-NAME" and "PREFIX" with your DB-name and wildcard prefix match. ** Also replace with your own username and password for mysql server. This command uses the information_schema to wildcard match tables that we donot need from a database and than pipes the remaining tables out through "xargs" command to the mysqldump utility which than dumps those remaining tables into a sql dump file. Show Sample Output
This is sample output - yours may be different.
```
Outputs a sql dump file.
```
0

mysql -uuser -ppass -e 'use information_schema; SELECT table_name FROM tables where table_schema="DB-NAME" and table_name NOT LIKE "PREFIX";' | grep -v table_name | xargs mysqldump DB-NAME -uuser -ppass > dump.sql

moosak · 2013-06-17 13:44:15 53
One liner to check out CLOSE_WAIT and TIME_WAIT connection every five seconds while debugging network apps

This has saved me many times while debugging timeout issues to "too many open files" issues. A high number of the order of thousand, indicates that somewhere connection is not being closed properly. Show Sample Output
This is sample output - yours may be different.
```
      7
      7
```
0

while true; do netstat -a|grep WAIT|wc -l; sleep 5; done

adimania · 2013-06-19 09:19:41 13
Geo Location of an IP-address

This command will help you to get Ip address origin of city and country. I will be happy if someone can shrink the sed command fb.me/josenirmal Show Sample Output
This is sample output - yours may be different.
```
Country:<name of the country>
City:<name of the city>
```
0

wget -qO - whatismyipaddress.com/ip/<type ip address> | grep -E "City:|Country:" | sed 's:<tr><th>::'| sed 's</th>::' | sed 's:</td>::' | sed 's:</tr>::' | sed 's:<img*::'

pentester · 2013-06-21 03:27:09 8
Get list of updateable packages on Debian/Ubuntu machines using salt stack
This is sample output - yours may be different.
0

salt -G 'os_family:Debian' cmd.run 'apt-get dist-upgrade --dry-run | grep ^Inst | cut -d" " -f2'

hinnerk · 2013-06-22 22:57:47 7
List partition superblocks
This is sample output - yours may be different.
0

sudo dumpe2fs /dev/sda1 | grep superblock

rugina · 2013-06-25 08:48:49 182
Wait for Web service to spin up, aka alert me when the server stops returning a 503

Show Sample Output
This is sample output - yours may be different.
```
OK: server is up.
OK: server is up.
OK: server is up.
```
0

while true; do curl -vsL -o /dev/null example.com 2>&1 | grep 503 > /dev/null || echo "OK: server is up."; sleep 8; done

noah · 2013-06-26 15:24:51 6
Wait for Web service to spin up, aka alert me when the server stops returning a 503
This is sample output - yours may be different.
0

while curl -dsL example.com 2>&1 | grep 503;do sleep 8;done;echo server up

emile · 2013-07-10 19:03:25 6

kworker issue. Phase one: find the culprit.

Goto phase 2 to clobber the interrupt that is problematic. Show Sample Output

grep enabled /sys/firmware/acpi/interrupts/*

m33600 · 2013-07-16 03:46:23 6

List all symbolic links in current directory

I use this with alias: alias lsl="ls -1F | grep @ | sed 's/@//' | column"
This is sample output - yours may be different.
0

$ ls -1F | grep @ | sed 's/@//' | column

jlbknr · 2013-07-19 17:41:03 7
List all symbolic links in current directory

I use this with alias: alias lsl="ls -1F | grep @$ | sed 's/@//' | column" Limitation: This will also list files that happen to have an @ at the end of the filename.
This is sample output - yours may be different.
0

ls -1F | grep @$ | sed 's/@//' | column

jlbknr · 2013-07-19 17:55:11 5
Threads and processes of a user

This shows all process (-e) and threads (-L) in full format (-F) Show Sample Output
This is sample output - yours may be different.
```
user  20905 21706 20905  0    6 111980 226256 4 10:10 ?        00:00:00 (wsgi:userprocess)             -k start -DSSL
```
0

ps -eLF | grep ^user

balsagoth · 2013-07-24 09:53:12 10
Find all Mac Address

Find mac address only from drivers, without using ifconfig. Show Sample Output
This is sample output - yours may be different.
```
[root@pc2 ~]# /sbin/lspci -v | grep -i "Device Serial Number"
        Capabilities: [160] Device Serial Number 00-14-78-ff-fe-8d-3e-1a
        Capabilities: [160] Device Serial Number 00-14-78-ff-fe-8d-3e-18
        Capabilities: [140] Device Serial Number e7-39-35-ff-ff-0f-5f-34
[root@pc2 ~]#
```
0

/sbin/lspci -v | grep -i "Device Serial Number"

adrruiz · 2013-07-29 18:07:04 6
Download German word pronounciation as mp3 file
This is sample output - yours may be different.
0

site=https://www.duden.de; wort="Apfel"; wget -O $wort.mp3 $(wget -O - "$site/rechtschreibung/$wort" | grep -o "$site/_media_/audio/[^\.]*\.mp3")

oldo · 2013-07-31 19:38:59 7
Start a random channel from the uk site tvcatchup.com

becuase im lazy and cant be bothered looking at the tv guide to choose a channel , any improvments or comments appreciated
This is sample output - yours may be different.
0

randchannelurl=$(lynx -dump http://www.tvcatchup.com/channels.html | grep watch | sed 's/^......//'| awk 'BEGIN { srand() } int(rand() * NR) == 0 { x = $0 } END { print x }') && firefox -new-window $randchannelurl

dunryc · 2013-08-01 10:38:10 10
psgrep(command)

Pipes the header row of ps to STDERR, then greps for the command on the output of ps, removing the grep entry before that. Show Sample Output
This is sample output - yours may be different.
```
$ psgrep syslogd
USER PID %CPU %MEM     VSZ RSS TT STAT STARTED    TIME COMMAND
root  23  0.0  0.0 2457208 676 ?? Ss   Mon09AM 0:02.63 /usr/sbin/syslogd
```
0

psgrep() { ps aux | tee >(head -1>&2) | grep -v " grep $@" | grep "$@" -i --color=auto; }

fnl · 2013-08-02 12:44:32 165
List you configure's ip address in your system

List system current active ip address Show Sample Output
This is sample output - yours may be different.
```
eth0    192.168.10.75/24
eth1    10.0.15.4/24
```
0

ip addr list | grep global | awk '{print $7"\t"$2}'

tevisky · 2013-08-08 13:05:35 7
To find a class/properties/xml in collection of jars
This is sample output - yours may be different.
0

for i in `find . -name "*.jar"`; do jar -tvf $i | grep -v /$ | awk -v file=$i '{print file ":" $8}'; done > all_jars.txt

rajashekar · 2013-08-09 17:03:30 6
Remove semaphores

Solves these pesky errors you see in the Apache log: [Fri Jun 28 17:51:00 2013] [emerg] (28)No space left on device: Couldn't create accept lock (/monsoon/opt/apache2/logs/accept.lock.356) (5) Naturally, can be used to get rid of other semaphores. Note: change the apache user in accordance to your ENV. Show Sample Output
This is sample output - yours may be different.
```
It works quietly, unless you have no sem IDs attached to this user [in this case, apache]
```
0

ipcs -s | grep apache | awk ' { print $2 } ' | xargs ipcrm sem

kernel01 · 2013-08-12 16:29:32 194
all java -Xmx values in a system, add them up

This will find all the -Xmx[BIGINT] running on a system, add them up for you and give you the total. Show Sample Output
This is sample output - yours may be different.
```
39424
```
0

output=$(ps -ef|grep -i java 2>/dev/null); for w in ${output[@]}; do if [[ $w =~ .*Xmx.* ]]; then result=$(grep -oP "[0-9]+" <<< $w); echo $result ;fi ; done| awk 'BEGIN {sum=0} {for(i=1; i<=NF; i++) sum+=$i } END {print sum}'

massiverobot · 2013-08-13 14:04:17 7
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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 files recursively by size

save command output to image

It's just because the original command was not working on version's 6.7.7-10.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

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.

Getting a domain from url, ex: very nice to get url from squid access.log

prints message in given argument on on center of screen

$ function echox { echo `tput cup $(($(tput lines))) $(( ($(tput cols) - $(echo "${#1}"))/2 ))`"$1"`tput cup $(tput lines) $(( $(tput cols)-1 ))`; } echox prints given argument on bottom line center screen in terminal $ function echoxy { echo `tput cup $(($(tput lines)/2)) $(( ($(tput cols) - $(echo "${#1}"))/2))`"$1"`tput cup $(tput lines) $(( $(tput cols)-1 ))`; } exhoxy prints given argument center screen $ function echos { echo `tput cup $(($(tput lines)-2)) $(($(tput cols)-$(echo ${#1})))&&tput sc`"$1"`tput cup $(($(tput lines)-2)) 0 && tput rc`; } $ while [ 1 ]; do echos "`date`"; done echos prints date and time on second from last line (used as status message) you can easily use these functions by placing them in your .bashrc file, make sure to source your .bashrc once you do

Remote screenshot

Admittedly, I'd never have thought of this without the earlier examples, but here's one that you can execute from your workstation to just display the image from another, without separately doing a file transfer, etc. By the way, I hear a loud beep coming from the other room, so I guess it's not too stealthy :-D

Extract audio from Mythtv recording to Rockbox iPod using ffmpeg

There are some pretty good live performances on late night TV. With Mythtv I record David Letterman, Jimmy Fallon, and Conan nightly all in HD from over the air broadcasts. If I find a live performance I like I copy it to my Rockboxed iPod using this command. The Rockbox firmware knows how to downmix 5.1 audio. The command above extracts the audio from the video starting at 58 minutes and 15 seconds. It ends at the end of the file since this was the last performance of the recording. The command creates an ac3 file. I copy the ac3 file to my Rockbox iPod and rock on.

Top ten (or whatever) memory utilizing processes (with children aggregate) - Can be done without the multi-dimensional array

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Commands using grep (1,935)

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