Commands using egrep sorted by votes

Commands using egrep (220)

sorted by

Kill any process with one command using program name

Somtime one wants to kill process not by name of executable, but by a parameter name. In such cases killall is not suitable method.
This is sample output - yours may be different.
4

kill -9 `ps ax | egrep [f]elix.jar | egrep -o -e '^ *[0-9]+'`

yababay · 2010-09-30 16:45:47 3
Get IP from hostname

Get the IP of a hostname.
This is sample output - yours may be different.
4

ping -c 1 google.com | egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'

BruceLEET · 2010-10-26 01:11:01 7
List only the directories

This command would be useful when it is desirable to list only the directories. 'egrep' chooses only the lines that begin with 'd'. Show Sample Output
This is sample output - yours may be different.
```
$ ls -l 
drwxrwx--- 2 sim sim 4096 2009-02-08 14:19 adir
-rwxrwx--- 1 sim sim   52 2009-02-05 13:11 a.sh
-rw-rw---- 1 sim sim    0 2009-02-05 13:09 x.txt
-rw-rw---- 1 sim sim    0 2009-02-05 13:09 y.txt
-rw-rw---- 1 sim sim    0 2009-02-05 13:09 z.txt

$ ls -l | egrep ^d
drwxrwx--- 2 sim sim 4096 2009-02-08 14:19 adir
```
3

ls -l | egrep ^d

ergut · 2009-02-08 22:21:55 13
diff will usually only take one file from STDIN. This is a method to take the result of two streams and compare with diff. The example I use to compare two iTunes libraries but it is generally applicable.

diff is designed to compare two files. You can also compare directories. In this form, bash uses 'process substitution' in place of a file as an input to diff. Each input to diff can be filtered as you choose. I use find and egrep to select the files to compare.
This is sample output - yours may be different.
3

diff <(cd /path-1; find . -type f -print | egrep -i '\.m4a$|\.mp3$') <(cd /path-2; find . f -print | egrep -i '\.m4a$|\.mp3$')

drewk · 2009-08-17 00:49:31 6
last.fm rss parser

Quick and kludgy rss parser for the recent tracks rss feed from last.fm. Extracts artist and track link. Show Sample Output
This is sample output - yours may be different.
```
<li><a href="http://www.last.fm/music/Morton+Feldman/_/Something+Wild">          Morton Feldman ? Something Wild</a></li>
<li><a href="http://www.last.fm/music/Christopher+Bissonnette/_/Pellucidity">          Christopher Bissonnette ? Pellucidity</a></li>
```
3

egrep "<link>|<title>" recenttracks.rss | awk 'ORS=NR%2?" ":"\n"' | awk -F "</title>" '{print $2, $1}' | sed -e 's/\<link\>/\<li\>\<a href\=\"/' -e 's/\<\/link\>/\">/' -e 's/\<title\>//' -e 's/$/\<\/a\>\<\/li\>/g' -e '1,1d' -e 's/^[ \t]*//'

HerbT · 2009-11-28 13:19:05 14
Speed up upgrades for a debian/ubuntu based system.

Please install aria2c before you try the above command. On ubuntu the command to install aria2c would be: sudo aptitude install aria2
This is sample output - yours may be different.
3

sudo aptitude update; sudo apt-get -y --print-uris upgrade | egrep -o -e "http://[^\']+" | sudo aria2c -c -d /var/cache/apt/archives -i -; sudo aptitude -y safe-upgrade

freethinker · 2010-02-18 16:02:29 6
Extract raw URLs from a file

you can also use cut instead of awk. less powerful but probably faster. ;)
This is sample output - yours may be different.
3

egrep -ie "<*HREF=(.*?)>" index.html | cut -d "\"" -f 2 | grep ://

fanfani · 2011-03-29 18:20:50 4
Get OSX Battery percentage

adjusting the field "f1" will give you additional information such as f1 = 98% f2 = discharging f3 = 2:02 remaining Show Sample Output
This is sample output - yours may be different.
```
98% #Get OSX Battery percentage
```
3

pmset -g batt | egrep "([0-9]+\%).*" -o --colour=auto | cut -f1 -d';'

deshawnbw · 2012-03-23 23:23:46 6
Get My Public IP Address
This is sample output - yours may be different.
2

wget -qO - http://myip.dk/ | egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'

6peng · 2009-02-06 03:25:08 20
List all the files that have been deleted while they were still open.

If your customer deletes a file that is still in use by a process, that space does not get freed up (will not show up in df) until that process either closes the file on its own, or is killed.
This is sample output - yours may be different.
2

lsof | egrep "^COMMAND|deleted"

jyoder · 2009-03-12 23:11:26 5
Get the current svn branch/tag (Good for PS1/PROMPT_COMMAND cases)

Get the svn info, grep for the "URL" of the repository, pull out the tag/branch/trunk, and then just show the helpful/meaningful bit. Show Sample Output
This is sample output - yours may be different.
```
trunk
```
2

svn info | grep '^URL:' | egrep -o '(tags|branches)/[^/]+|trunk' | egrep -o '[^/]+$'

isaacs · 2009-04-09 20:08:45 5
Solaris - check ports/sockets which process has opened
This is sample output - yours may be different.
2

/usr/proc/bin/pfiles $PID | egrep "sockname|port"

sengork · 2009-07-04 08:26:54 9
Get Futurama quotations from slashdot.org servers
This is sample output - yours may be different.
2

lynx -head -dump http://slashdot.org|egrep 'Bender|Fry'|sed 's/X-//'

linuxrawkstar · 2009-07-30 19:53:16 3
Short Information about loaded kernel modules

Run this as root, it will be helpful to quickly get information about the loaded kernel modules. Show Sample Output
This is sample output - yours may be different.
```
# lsmod | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/s/$/\n/g'
filename:       /lib/modules/2.6.26-2-amd64/kernel/drivers/net/usb/cdc_ether.ko
description:    USB CDC Ethernet devices
depends:        usbnet

filename:       /lib/modules/2.6.26-2-amd64/kernel/drivers/net/usb/usbnet.ko
description:    USB network driver framework
depends:        mii
```
2

lsmod | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/s/$/\n/g'

mohan43u · 2009-11-17 02:13:34 3
Find the fastest server to disable comcast's DNS hijacking

Comcast is an ISP in the United States that has started hijacking DNS requests as a "service" for its customers. For example, in Firefox, one used to be able to do a quick "I'm Feeling Lucky" Google search by typing a single word into the URL field, assuming the word is not an existing domain when surrounded by www.*.com. Comcast customers never receive the correct NX (non-existent domain) error from DNS. Instead, they are shown a page full of advertising. There is a way to "opt out" from their service, but that requires having the account password and the MAC address of your modem handy. For me, it was easier just to set static DNS servers. But the problem is, which ones to choose? That's what this command answers. It'll show you the three _non-hijacked_ Comcast DNS servers that are the shortest distance away. Perhaps you don't have Comcast (lucky you!), but hopefully this command can serve as an example of using netselect to find the fastest server from a list. Note that, although this example doesn't show it, netselect will actually perform the uniq and DNS resolution for you. Requires: netselect, curl, sort, uniq, grep Show Sample Output
This is sample output - yours may be different.
```
Running netselect to choose 3 out of 12 addresses.      
...........................................................................
   53 68.87.69.146
   62 68.87.76.178
  273 68.87.74.162
```
2

sudo netselect -v -s3 $(curl -s http://dns.comcast.net/dns-ip-addresses2.php | egrep -o '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | sort | uniq)

hackerb9 · 2010-01-27 00:03:44 5
Get Unique Hostnames from Apache Config Files

Get a list of all the unique hostnames from the apache configuration files. Handy to see what sites are running on a server. A slightly shorter version.
This is sample output - yours may be different.
2

cat /etc/apache2/sites-enabled/* | egrep 'ServerAlias|ServerName' | tr -s ' ' | sed 's/^\s//' | cut -d ' ' -f 2 | sed 's/www.//' | sort | uniq

chronosMark · 2010-04-08 15:50:34 2
Get each users commit amount
This is sample output - yours may be different.
2

svn log 2>&1 | egrep '^r[0-9]+' | cut -d "|" -f2 | sort | uniq -c

cicatriz · 2010-09-06 15:13:48 4
resolve short urls

since the most url shorteners respond with a header containing the Location: ... this works with most common shorteners Show Sample Output
This is sample output - yours may be different.
```
resolve http://goo.gl/gy8n
-> http://www.commandlinefu.com/commands/browse
```
2

resolve(){ curl -Is $1 | egrep "Location" | sed "s/Location: $.*$/\1/g"; }

hoodie · 2011-12-06 12:37:46 20
Prints a file leaving out all blank lines and comment-only lines

Does not print any line that either: - is empty - contains only spaces or tabs - starts with # - starts with spaces/tabs followed by a #
This is sample output - yours may be different.
2

egrep -v "^\s*(#|$)" myfile.cfg

dan · 2011-12-08 15:25:17 70
Show sections of a man page.

Uses the formatting of a man page to show an outline of its headers and sub-headers. Show Sample Output
This is sample output - yours may be different.
```
LS(1)
NAME
SYNOPSIS
DESCRIPTION
   Exit status:
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO
GNU coreutils 7.4 
```
2

man ls | egrep "^([A-Z]| [A-Z])"

bartonski · 2013-01-09 17:12:03 5
Shows size of dirs and files, hidden or not, sorted.
This is sample output - yours may be different.
2

du --max-depth=1 -h * |sort -n -k 1 |egrep 'M|G'

leonteale · 2013-02-07 18:52:29 4
Extract HTTP Passwords in POST Requests
This is sample output - yours may be different.
2

sudo tcpdump -s 0 -A -n -l | egrep -i "POST /|pwd=|passwd=|password=|Host:"

wuseman1 · 2019-02-03 05:15:28 901
edit, view or execute last modified file with a single key-press

Copy this function to command line, press 'Enter' 'f'' 'Enter' to execute (sentence on the left written only for newbies). Hint 'e|x|v|1..9' in front of displayed last modified file name means: "Press 'e' for edit,'x' for execute,'v' for view or a digit-key '1..9' to touch one file from the recent files list to be last modified" and suggested (hidden files are listed too, else remove 'a' from 'ls -tarp' statement if not intended). If you find this function useful you can then rename it if needed and append or include into your ~/.bashrc config script. With the command . ~/.bashrc the function then can be made immediately available. In the body of the function modifications can be made, i.e. replaced joe editor command or added new option into case statement, for example 'o) exo-open $h;;' command for opening file with default application - or something else (here could not be added since the function would exceed 255 chars). To cancel execution of function started is no need to press Ctrl-C - if the mind changed and want to leave simple Enter-press is enough. Once defined, this function can with typeset -f f command be displayed in easy readable form Show Sample Output
This is sample output - yours may be different.
```
knoppix5@kanta:~/SKRIPTE$ f
...
1       rdiff_backup_to_sda3.txt
2       arrange_windows_simple_from_xfce_panel.txt
3       .config.sh
4       arrange_windows.txt
5       read1.sh
6       read3.sh
7       lsb.sh
8       board9.pgn
9       read4.sh
e|x|v|1..9 read4.sh?
```
2

f() { ls -lart;e="ls -tarp|grep -v /|tail -9";j=${e/9/1};g=${e/9/9|nl -nln};h=$(eval $j);eval $g;read -p "e|x|v|1..9 $(eval $j)?" -n 1 -r;case $REPLY in e) joe $h;;v)cat $h;;x) eval $h;;[1-9]) s=$(eval $g|egrep ^$REPLY) && touch "${s:7}" && f;;esac ; }

knoppix5 · 2019-09-26 11:58:37 249
Validate openssh key & print checksum
This is sample output - yours may be different.
1

ssh-keygen -l -f [pubkey] | awk '{print $2}' | tr -ds ':' '' | egrep -ie "[a-f0-9]{32}"

wwest4 · 2009-02-05 17:42:30 16
Get My Public IP Address
This is sample output - yours may be different.
1

curl -s http://myip.dk/ | egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'

6peng · 2009-02-06 03:23:39 33
< 1 2 3 4 > 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

Multi-thread any command

For instance: $ find . -type f -name '*.wav' -print0 |xargs -0 -P 3 -n 1 flac -V8 will encode all .wav files into FLAC in parallel. Explanation of xargs flags: -P [max-procs]: Max number of invocations to run at once. Set to 0 to run all at once [potentially dangerous re: excessive RAM usage]. -n [max-args]: Max number of arguments from the list to send to each invocation. -0: Stdin is a null-terminated list. I use xargs to build parallel-processing frameworks into my scripts like the one here: http://pastebin.com/1GvcifYa

lazy SQL QUERYING

alias for psql command line; works similar for Oracles sqlplus commandline interface. if you do not provide stdin you will end up in the db shell.

Create a video that is supported by youtube

Takes an mpeg video and coverts it to a youtube compatible flv file. The -r 25 sets the frame rate for PAL, for NTSC use 29.97

Show a git log with offsets relative to HEAD

Print a git log (in reverse order) giving a reference relative to HEAD. HEAD (the current revision) can also be referred to as HEAD~0 The previous revision is HEAD~1 then HEAD~2 etc. . Add line numbers to the git output, starting at zero: $ ... | nl -v0 | ... . Insert the string 'HEAD~' before the number using sed: $ ... | sed 's/^ \+/&HEAD~/' . Thanks to bartonski for the idea :-)

Display a list of all PHP classes that are called statically

Searches all .php files for a static instantiation of a class and displays the class names along with their frequencies.

Dump dvd from a different machine onto this one.

You can use this to directly dump from machine A (with dvd drive) to machine B (without dvd drive) . I used this to copy dvd using my friend's machine to my netbook. Above command is to be issued on machine B. Advantages : 1) No wasting time dumping first to machine A and then copying to Machine B. 2) You dont need to use space on Machine A. In fact, this will work even when Machine A doesnt have enough hdd space to dump the DVD. Use -C ssh option on slow networks (enables compression). you can replace "dd if=/dev/dvd" with any ripping command as long as it spews the iso to stdout.

Convert files from DOS line endings to UNIX line endings

This method will also convert mac line endings.

subtraction between lines

It's allways strange for me to see sed and awk in the same command line if you can avoid it

show the real times iso of epochs for a given column

When you have one of those (log)files that only has epoch for time (since no one will ever look at them as a date) this is a way to get the human readable date/time and do further inspection. Mostly perl-fu :-/

My PS1

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 egrep

Commands using egrep (220) 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 egrep (220)

sorted by