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
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View details of network activity, malicious or otherwise within a port range.

View details of both TCP and UDP network activity within a specified port range.

Find file containing namespace in a directory of jar files.

You could subsitute javax.servlet for any namespace you need.

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)

Print unique ipaddresses as they come in from Apache Access Log File

Prints the unique IP Addresses as they arrive from an Apache `access.log` file. The '-W interactive' tells awk to start writing to stdout immediately and not buffer the output. This command builds on the uniq lines without sorting command (http://www.commandlinefu.com/commands/view/4389/remove-duplicate-entries-in-a-file-without-sorting.)

Find unused IPs on a given subnet

Backup a filesystem to a remote machine and use cstream to throttle bandwidth of the backup

This command will nicely dump a filesystem to STDOUT, compress it, encrypt it with the gpg key of your choice, throttle the the data stream to 60kb/s and finally use ssh to copy the contents to an image on a remote machine.

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"

Rename all files which contain the sub-string 'foo', replacing it with 'bar'

That is an alternative to command 8368. Command 8368 is EXTREMELY NOT clever. 1) Will break also for files with spaces AND new lines in them AND for an empty expansion of the glob '*' 2) For making such a simple task it uses two pipes, thus forking. 3) xargs(1) is dangerous (broken) when processing filenames that are not NUL-terminated. 4) ls shows you a representation of files. They are NOT file names (for simple names, they mostly happen to be equivalent). Do NOT try to parse it. Why? see this :http://mywiki.wooledge.org/ParsingLs Recursive version: $ find . -depth -name "*foo*" -exec bash -c 'for f; do base=${f##*/}; mv -- "$f" "${f%/*}/${base//foo/bar}"; done' _ {} +

32 bits or 64 bits?

Easy and direct way to find this out.

Mount a truecrypt drive from a file from the command line interactively

It seems to completely void the benefit of having an encrypted folder if you then have a script on your unencrypted hard drive with your password in it. This command will mount a truecrypt file at a given mount point after asking you for the password.

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Commands using sed (1,319)

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