Commands using grep sorted by votes

Commands using grep (1,935)

sorted by

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
‹ First < 47 48 49 50 51 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Print out your hard drive to a jet-direct compatible printer.

Where 192.168.1.2 is a printer with jet-direct. No, I don't suggest this as a backup method.

Print text string vertically, one character per line.

Unlock your KDE4 session remotely (for boxes locked by KDE lock utility)

Do the unlock KDE screen saver locked session with lightdm display manager used in Kubuntu 12.10 +

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Recursively list all of the files in a directory, group them by extension and calculate the average of the file sizes in each group

Here's an annotated version of the command, using full-names instead of aliases. It is exactly equivalent to the short-hand version. # Recursively list all the files in the current directory. Get-ChildItem -Recurse | # Filter out the sub-directories themselves. Where-Object { return -not $_.PsIsContainer; } | # Group the resulting files by their extensions. Group-Object Extension | # Pluck the Name and Count properties of each group and define # a custom expression that calculates the average of the sizes # of the files in that group. # The back-tick is a line-continuation character. Select-Object ` Name, Count, @{ Name = 'Average'; Expression = { # Average the Length (sizes) of the files in the current group. return ($_.Group | Measure-Object -Average Length).Average; } } | # Format the results in a tabular view, automatically adjusted to # widths of the values in the columns. Format-Table -AutoSize ` @{ # Rename the Name property to something more sensible. Name = 'Extension'; Expression = { return $_.Name; } }, Count, @{ # Format the Average property to display KB instead of bytes # and use a formatting string to show it rounded to two decimals. Name = 'Average Size (KB)'; # The "1KB" is a built-in constant which is equal to 1024. Expression = { return $_.Average / 1KB }; FormatString = '{0:N2}' }

Show a prettified list of nearby wireless APs

connects to a serial console

cu (call UNIX) establishes a full-duplex connection to another machine (*BSD) using a serial console. It becames more useful than screen if you have to send a BREAK signal. using cu just type "~#". $man cu http://www.openbsd.org/cgi-bin/man.cgi?query=cu&apropos=0&sektion=0&manpath=OpenBSD+Current&arch=i386&format=html

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)

Delete all but the latest 5 files, ignoring directories

Delete a file/directory walking subdirectories (bash4 or zsh)

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using grep

Commands using grep (1,935) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using grep (1,935)

sorted by