Commands using grep sorted by votes

Commands using grep (1,935)

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Find the uid and gid of your apache process

This command allows you to find the effective uid and gid of the Apache process regardless of process name (which can be apache2 or httpd depending on distro).
This is sample output - yours may be different.
-1

ps -o euid,egid --ppid `netstat --inet --inet6 -pln|awk '/:80 / { split($7,tmp, "/"); print tmp[1]; }'`|sort |uniq|grep -v EUID

chx · 2010-11-18 21:22:29 2
get memory configuration (not consumption) for all running VMware virtual machines

So your boss wants to know how much memory has been assigned to each virtual machine running on your server... here's how to nab that information from the command line while logged in to that server Show Sample Output
This is sample output - yours may be different.
```
              aa.devel.mydomain.com.vmx: 1024 M
                 devel.mydomain.com.vmx: 2048 M
                   ftp.mydomain.com.vmx: 256 M
                  mail.mydomain.com.vmx: 256 M
                         testdotnet.vmx: 3072 M
                          testjava2.vmx: 3072 M
                          testjava3.vmx: 3072 M
                           testjava.vmx: 3072 M
                   web.mydomain.com.vmx: 256 M
                              rhel5.vmx: 2048 M
```
-1

for file in $( vmrun list | grep 'vmx$' | sort ); do printf "% 40s %s M\n" $(echo "$( echo -n ${file}:\ ; grep memsize $file )" | sed -e 's/.*\///' -e 's/"//g' -e 's/memsize.=//'); done;

linuxrawkstar · 2010-11-19 06:14:11 3
print a cpu of a process
This is sample output - yours may be different.
-1

ps -eo args,%cpu | grep -m1 PROCESS | tr 'a-z-' ' ' | awk '{print $1}'

lin72 · 2010-11-29 17:43:52 4
find names of files ending in *log that have both foo and bar

Uses xargs to call the second grep with the first grep's results as arguments
This is sample output - yours may be different.
-1

grep -l bar *.log | xargs grep -l foo

dlebauer · 2011-01-10 19:54:46 3
Search through files, ignoring .svn

Unless you have files that include 'svn' in them, this should provide enough information to be useful. If you need to be certain, add the leading dot in the search pattern
This is sample output - yours may be different.
-1

find . | grep -v svn

gwchamb · 2011-01-16 03:51:57 4
Fetch current song from last.fm
This is sample output - yours may be different.
-1

curl -s http://www.last.fm/user/$LASTFMUSER | grep -A 1 subjectCell | sed -e 's#<[^>]*>##g' | head -n2 | tail -n1 | sed 's/^[[:space:]]*//g'

sn0opy · 2011-01-24 08:16:48 3
turn off all services in specific runlevel

works in fedora, centos and presumably other distros that use chkconfig
This is sample output - yours may be different.
-1

for i in $(chkconfig --list | grep "4:on" | awk {'print $1'}); do chkconfig --level 4 "$i" off; done

m1cawber · 2011-01-25 03:54:43 6
find the device when you only know the mount point

less ressources (processes) needed Show Sample Output
This is sample output - yours may be different.
```
/dev/sdc1
```
-1

grep -w /media/KINGSTON /proc/mounts | cut -d " " -f

BorneBjoern · 2011-01-25 23:45:35 3
Find artist and title of a music cd, UPC code given (first result only)

Substitute that 724349691704 with an UPC of a CD you have at hand, and (hopefully) this oneliner should return the $Artist - $Title, querying discogs.com. Yes, I know, all that head/tail/grep crap can be improved with a single sed command, feel free to send "patches" :D Enjoy! Show Sample Output
This is sample output - yours may be different.
```
Iron Maiden - Killers
```
-1

wget http://www.discogs.com/search?q=724349691704 -O foobar &> /dev/null ; grep \/release\/ foobar | head -2 | tail -1 | sed -e 's/^<div>.*>$.*$<\/a><\/div>/\1/' ; rm foobar

TetsuyO · 2011-01-30 23:34:54 3
Root Security

This will tighten up security for your box. The default value for PermitRootLogin sadly is 'yes'.
This is sample output - yours may be different.
-1

s=/etc/ssh/sshd_config;r=PermitRootLogin;cp $s{,.old}&& if grep $r $s;then sed "s/$r yes/$r no/" $s.old > $s; else echo $r no >> $s;fi

kzh · 2011-01-30 23:41:59 11
find the device when you only know the mount point
This is sample output - yours may be different.
-1

mount | grep "mount point"

mimivx · 2011-01-31 10:21:09 2
Download Entire YouTube Channel - all of a user's videos
This is sample output - yours may be different.
-1

yt-chanrip() { for i in $(curl -s http://gdata.youtube.com/feeds/api/users/"$1"/uploads | grep -Eo "watch\?v=[^[:space:]\"\'\\]{11}" | uniq); do youtube-dl --title --no-overwrites http://youtube.com/"$i"; done }

AceSilvershadow · 2011-02-02 01:12:26 4
delete a file and links based on inode number.

This command, when run from the directory containing "filename", will remove the file and any hard or symbolic links to the file.
This is sample output - yours may be different.
-1

ls -ai | grep filename | find . -inum `awk '{print $1}'` -exec rm {} \;

YogiBare · 2011-02-04 10:29:54 7
Check default block size on ext2/ext3 filesystems

the result of the command helped a check the Maximum file size and Maximum file system size. EXT3 Exemple: Block size; MAX File size; Maximum file system size 1 KiB; 16 GiB ; 2 TiB 2 KiB ; 256 GiB ; 8 TiB 4 KiB ; 2 TiB ; 16 TiB 8 KiB[limits 1]; 2 TiB; 32 TiB Show Sample Output
This is sample output - yours may be different.
```
root@zappa:/tmp# tune2fs -l /dev/sda6 | grep -w ^"Block size:"
Block size:               4096
```
-1

tune2fs -l /dev/XXXX | grep -w ^"Block size:"

ncaio · 2011-02-10 16:39:14 3
Clean-up release directories keeping the only the latest two

Deletes capistrano-style release directories (except that there are dashes between the YYYY-MM-DD) Show Sample Output
This is sample output - yours may be different.
```
user@server:~/apps/appname/releases$ ls
2010-12-02-121502  2010-12-01-215457
```
-1

find . -maxdepth 1 -type d | grep -Pv "^.$" | sort -rn --field-separator="-" | sed -n '3,$p' | xargs rm -rf

wilmoore · 2011-03-08 17:38:26 6
this svn script will commit all files excluding those with extensions {.project .classpath .properties .sh .number} and those with Status Modified or Added {M or A}
This is sample output - yours may be different.
-1

svn st | grep -e [MA] | egrep -ve '.project|.classpath|.properties|.sh|.number' | awk -F' ' '{ print $2}' | xargs svn ci -m "message"

drunkcoder · 2011-03-10 15:32:36 6
List Seeon.tv Available Video Channels

This shows a list of channels from seeon.tv website to watch shows and movies
This is sample output - yours may be different.
-1

lynx --dump http://www.seeon.tv/channels| grep "/channels"|awk '{print $2}'|sort -u|while read links; do lynx --dump "$links"|awk '/view/ {print $2}'|sort -u; done

Bonster · 2011-04-01 05:58:20 5
view someone's twitter stream from terminal
This is sample output - yours may be different.
-1

grabtweets() { curl -s -o $GT_TMP twitter.com/$1 | cat $GT_TMP | grep entry-content | sed -e :loop -e 's/<[^>]*>//g;/</N;//bloop' | sed 's/^[ \t]*//'; }

gl101 · 2011-05-04 21:49:08 5
convert chrome html export to folders, links and descriptions

chrome only lets you export in html format, with a lot of table junk, this command will just export the titles of the links and the links without all that extra junk Show Sample Output
This is sample output - yours may be different.
```
<h3>search engines</h3>
<a href="http://google.com/">google search engine</a>
```
-1

grep -E '<DT><A|<DT><H3' bookmarks.html | sed 's/<DT>//' | sed '/Bookmarks bar/d' | sed 's/ ADD_DATE=\".*\"//g' | sed 's/^[ \t]*//' | tr '<A HREF' '<a href'

chrismccoy · 2011-05-26 22:21:01 8
Find redirection and grep

You can find every file with png extension and redirect its output to file. Later you can find a string inside the file.
This is sample output - yours may be different.
-1

find . -name "*.png" | tee images.txt | grep book

wilbercarmona · 2011-06-02 23:55:50 4
Count the number of queries to a MySQL server

Counts Mysql Threads mysql switches -N skip column names (remove headers) -s silent mode (removes separator chars) -r raw output -e execute grep switches -c count lines -v invert match (match all except) Show Sample Output
This is sample output - yours may be different.
```
36
```
-1

mysql -uUser -pPassword -N -s -r -e 'SHOW PROCESSLIST' | grep -cv "SHOW PROCESSLIST"

lextoumbourou · 2011-06-10 13:00:53 5

Clone all remote branches of a specific GitHub repository

-1

git branch -a | grep "remotes/origin" | grep -v master | awk -F / '{print $3}' | xargs -I % git clone -b % git://github.com/jamesotron/DevWorld-2010-Cocoa-Workshop %

evandrix · 2011-06-29 00:13:47 3

Count the lines of source code in directory, ignoring files in generated by svn

There's nothing particularly novel about this combination of find, grep, and wc, I'm just putting it here in case I want it again. Show Sample Output
This is sample output - yours may be different.
```
123 ./src/java/com/company/app/service/Foo.java
 42 ./test/java/com/company/app/service/FooTests.java
165 total
```
-1

find . -name '*.java' -o -name '*.xml' | grep -v '\.svn' | xargs wc -l

ewilson · 2011-06-30 12:45:40 5
Find most used focal lengths in a directory of photos

First column is number of photos, second column is the focal length. Show Sample Output
This is sample output - yours may be different.
```
     17 17.0
      2 47.0
      1 50.0
      4 53.0
      6 78.0
      3 85.0
```
-1

exiv2 *JPG | grep Focal | awk '{print $5}' | sort -n | uniq -c

ivanatora · 2011-07-05 11:25:29 8
Lookaround in grep

tutorial @ http://www.regular-expressions.info/lookaround.html also see @ http://stackoverflow.com/questions/5080988/how-to-extract-string-following-a-pattern-with-grep-regex-or-perl for tip: `grep -Po 'name="\K.*?(?=")' file.txt` Show Sample Output
This is sample output - yours may be different.
```
$ John
```
-1

echo "John's" | grep -Po '\b\w+(?<!s)\b'

evandrix · 2011-07-15 12:08:18 6
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urlencoding with one pure BASH builtin

opposite of https://www.commandlinefu.com/commands/view/10014/urldecoding-with-one-pure-bash-builtin ;-)

list files recursively by size

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

Based on capsule8 agent examples, not rigorously tested

listen to ram

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"

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

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"

external projector for presentations

i spent way too many hours trying to fiddle with /etc/X11/xorg.conf trying to hook up various external projectors. too bad i didn't know this would solve all my problems.

Run a command as root, with a delay

$ sleep 1h ; sudo command or $ sudo sleep 1h ; sudo command won't work, because by the time the delay is up, sudo will want your password again.

full path listing in /directory/path/* of javascript files.

file listing in /directory/path/* of specific files such as javascript(js) .

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Commands using grep (1,935)

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