Commands using sed sorted by votes

Commands using sed (1,319)

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Generate MD5 of string and output only the hash checksum
This is sample output - yours may be different.
-1

echo -n "String to get MD5" | md5sum | sed "s/ -//"

Tephlon · 2011-03-03 23:40:04 3
List of syscalls (for 32/64 bits systems)
This is sample output - yours may be different.
-1

egrep '__NR_' /usr/include/asm/unistd_`getconf -a | awk '$1~/^WORD/{print $2}'`.h | sed -e 's/^#define __NR_//' | column -t

cicatriz · 2011-03-04 15:09:40 6
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
easily strace all your apache processes
This is sample output - yours may be different.
-1

ps -C apache o pid= | sed 's/^/-p /' | xargs strace

depesz · 2011-03-15 08:46:33 3
commit message generator - whatthecommit.com

Requires html2text. Print bad, but often funny commit messages from whatthecommit.com Show Sample Output
This is sample output - yours may be different.
```
I don't know what these changes are supposed to accomplish but somebody told me
to make them.
```
-1

curl -s http://whatthecommit.com | html2text | sed '$d'

zbeekman · 2011-04-14 16:51:53 4
Remove all unused kernels with apt-get

Same as 7272 but that one was too dangerous so i added -P to prompt users to continue or cancel Note the double space: "...^ii␣␣linux-image-2..." Like 5813, but fixes two bugs: [1]This leaves the meta-packages 'linux-headers-generic' and 'linux-image-generic' alone so that automatic upgrades work correctly in the future. [2]Kernels newer than the currently running one are left alone (this can happen if you didn't reboot after installing a new kernel).
This is sample output - yours may be different.
-1

sudo aptitude remove -P $(dpkg -l|awk '/^ii linux-image-2/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname -r` 'v>$0'|sed 's/-generic//'|awk '{printf("linux-headers-%s\nlinux-headers-%s-generic\nlinux-image-%s-generic\n",$0,$0,$0)}')

Bonster · 2011-04-25 05:19:57 3
Colored cal output

Colors a the current date in cal output Show Sample Output
This is sample output - yours may be different.
```
     April 2011
Su Mo Tu We Th Fr Sa
                1  2
 3  4  5  6  7  8  9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
```
-1

cal | sed -E "2,8s/(^|[^0-9])($(date +%e))( |$)/\1$(echo "\033[0;36m\2\033[0m")\3/g"

iridium172 · 2011-04-30 03:16:31 56
bulk rename files with sed, one-liner
This is sample output - yours may be different.
-1

ls | sed 'p;s/foo/bar/' | xargs -n2 mv

pkufranky · 2011-04-30 10:56:35 3
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
Generat a Random MAC address
This is sample output - yours may be different.
-1

2>/dev/null dd if=/dev/urandom bs=1 count=6 | od -t x1 |sed '2d;s/^0\+ //;s/ /:/g'

flyc0r · 2011-05-17 21:04:35 3
urldecoding

urldecode files in current directrory
This is sample output - yours may be different.
-1

ls * | while read fin;do fout=$(echo -n $fin | sed -e's/%$[0-9A-F][0-9A-F]$/\\\\\x\1/g' | xargs echo -e);if [ "$fout" != "$fin" ];then echo "mv '$fin' '$fout'";fi;done | bash -x

pawelb1973 · 2011-05-18 07:24:54 82
truncate files without output redirection or temporary file creation

This is good for cleaning up log files without having to erase the entire contents of the file, and allows you to keep the most recent entries to the log only
This is sample output - yours may be different.
-1

sed -i 's/`head -n 500 foo.log`//' foo.log

kevinquinnyo · 2011-05-23 09:41:35 7
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
Describe differences between files

Using sed to print newlines as doing it in one line with diff is non-trivial.
This is sample output - yours may be different.
-1

diff --changed-group-format='differs from line %dF to line %dL|' --unchanged-line-format='' $FILE1 $FILE2 | sed 's/|/\n/'

dullgiulio · 2011-06-02 15:04:36 3
Purge application's residual config & orphans
This is sample output - yours may be different.
-1

dpkg -l | sed '/^rc/!d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/' | xargs -r sudo apt-get -y purge

plasticdoc · 2011-06-05 09:19:27 3
Remove CR LF from a text file
This is sample output - yours may be different.
-1

sed -i 's/\r\n//' file.txt

ewilson · 2011-06-23 20:34:22 3
Generat a Random MAC address

I liked vaporub's suggestion, here a little simplification of the sed command.
This is sample output - yours may be different.
-1

MAC=$((date +'%Y%m%d%H%M%S%N'; cat /proc/interrupts) | md5sum | sed -r 's/(..)/\1:/g' | cut -d: -f 1-6)

jazznjam · 2011-07-14 13:11:50 3
Display only hosts up in network

Today many hosts are blocking traditional ICMP echo replay for an "security" reason, so nmap's fast ARP scan is more usable to view all live IPv4 devices around you. Must be root for ARP scanning.
This is sample output - yours may be different.
-1

nmap -sP -PR -oG - `/sbin/ip -4 addr show | awk '/inet/ {print $2}' | sed 1d`

l3k · 2011-07-21 11:50:26 3
do a full file listing of every file found with locate

Escapes spaces in paths.
This is sample output - yours may be different.
-1

locate -i yourfilename | sed 's/ /\\ /g' | xargs ls -lah | less

unixmonkey23919 · 2011-07-26 13:00:39 4
Remove color codes (special characters) with sed
This is sample output - yours may be different.
-1

cat input.txt | sed 's/\\\033[^a-zA-Z]*.//g'

lingo · 2011-08-02 05:27:36 4
change dir to n-th dir that you listed

Replace the head -1 with head -n that is the n-th item you want to go to. Replace the head with tail, go to the last dir you listed. You also can change the parameters of ls.
This is sample output - yours may be different.
-1

cd $(ls -ltr|grep ^d|head -1|sed 's:.*\ ::g'|tail -1)

timothyhmchen101 · 2011-08-10 03:39:35 2
Time redis ping in thousands of a second.

Outputs the real time it takes a Redis ping to run in thousands of a second without any proceeding 0's. Useful for logging or scripted action.
This is sample output - yours may be different.
-1

TIME=$( { time redis-cli PING; } 2>&1 ) ; echo $TIME | awk '{print $3}' | sed 's/0m//; s/\.//; s/s//; s/^0.[^[1-9]*//g;'

allrightname · 2011-08-11 19:09:49 4
creates a xkcd #936-style password
This is sample output - yours may be different.
-1

RANGE=`wc -l /usr/share/dict/words | sed 's/^$[0-9]*$ .*$/\1/'`; for i in {1..4}; do let "N = $RANDOM % $RANGE"; sed -n -e "${N}p" /usr/share/dict/words | tr -d '\n'; done; RANGE=100; let "N = $RANDOM % $RANGE"; echo $N

unixmonkey24597 · 2011-08-16 07:04:57 3
Print the lastest stable version of Perl

This uses wget instead of curl
This is sample output - yours may be different.
-1

wget -q -O - http://www.perl.org/get.html | grep -m1 '\.tar\.gz' | sed 's/.*perl-//; s/\.tar\.gz.*//'

dbbolton · 2011-08-19 23:38:10 3
Print just line 4 from a textfile

d --> delete !d ---> delete others
This is sample output - yours may be different.
-1

sed '4!d'

totti · 2011-09-05 17:54:57 3
‹ First < 44 45 46 47 48 > Last ›

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Rotate a single page PDF by 180 degrees

More pdftk examples: http://www.pdflabs.com/docs/pdftk-cli-examples/

pretend to be busy in office to enjoy a cup of coffee

Not as taxing on the CPU.

Delete files older than..

This command will delete files i a given path (/dir_name) , which older than given time in days (-mtime +5 will delete files older than five days.

coloured shell prompt

This coloured prompt will show: username in green, grey "@" sign, hostname in red, current directory in yellow, typed commands in green.

check open ports without netstat or lsof

Create a random file of a certain, and display progress along the way.

SIZE is the number of gigabytes and the file name is at the end. Random data is generated by encrypting /dev/zero, similar to other techniques posted on here.

Selecting a random file/folder of a folder

Also looks in subfolders

Query well known ports list

Uses the file located in /etc/services

Share your terminal session real-time

One person does `mkfifo foo; script -f foo' and another can supervise real-time what is being done using `cat foo'.

list block devices

Shows all block devices in a tree with descruptions of what they are.

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Commands using sed (1,319)

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