Commands using sed sorted by votes

Commands using sed (1,319)

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Display a block of text with AWK
This is sample output - yours may be different.
7

sed -n /start_pattern/,/stop_pattern/p file.txt

pipping · 2009-10-24 16:35:39 8
Display the output of a command from the first line until the first instance of a regular expression.

If BREs can be used, this sed version will also get the job done.
This is sample output - yours may be different.
7

command | sed -n '1,/regex/p'

putnamhill · 2009-12-22 15:04:38 10
Define words and phrases with google.

This version works on Mac (avoids grep -P, adding a sed step instead, and invokes /usr/bin/perl with full path in case you have another one installed). Still requires that you install perl module HTML::Entities ? here's how: http://www.perlmonks.org/?node_id=640489
This is sample output - yours may be different.
7

define(){ local y="$@";curl -sA"Opera" "http://www.google.com/search?q=define:${y// /+}"|grep -Eo '<li>[^<]+'|sed 's/^<li>//g'|nl|/usr/bin/perl -MHTML::Entities -pe 'decode_entities($_)';}

gthb · 2010-01-30 13:08:03 14
Update zone file Serial numbers

Will edit *.db files in the same directory with todays date. Useful for doing a mass update to domains on a nameserver, adding spf records, etc. Looks for a string starting with 200 or 201 followed by 7 numbers, and replaces with todays date. This won't overwrite Ip's but i would still do some double checking after running this. Make sure your server's date is correct, otherwise insert your own serial number. rndc reload should usually follow this command.
This is sample output - yours may be different.
7

sed -i 's/20[0-1][0-9]\{7\}/'`date +%Y%m%d%I`'/g' *.db

alf · 2010-03-24 07:28:58 10
Lets Tux say the random fact. [add it to .bashrc to see it in new terminal window]
This is sample output - yours may be different.
7

wget randomfunfacts.com -O - 2>/dev/null|grep \<strong\>|sed "s;^.*<i>$.*$</i>.*$;\1;"|cowsay -f tux

unixmonkey10612 · 2010-07-01 18:31:36 3
Retrieve a random command from the commandlinefu.com API

Seeing that we get back plain text anyway we don't need lynx. Also the sed-part removes the credit line.
This is sample output - yours may be different.
7

wget -qO - http://www.commandlinefu.com/commands/random/plaintext | sed -n '1d; /./p'

dramaturg · 2010-12-05 15:32:14 11
Remove all unused kernels with apt-get

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). I'm bummed that this took 228 characters. I'd like to see a simpler version. Show Sample Output
This is sample output - yours may be different.
```
The following packages will be REMOVED:  
  linux-headers-2.6.32-24 linux-headers-2.6.32-24-generic linux-headers-2.6.32-25 linux-headers-2.6.32-25-generic linux-headers-2.6.35-22 
  linux-headers-2.6.35-22-generic linux-image-2.6.32-24-generic linux-image-2.6.32-25-generic linux-image-2.6.35-22-generic 
0 packages upgraded, 0 newly installed, 9 to remove and 0 not upgraded.
Need to get 0B of archives. After unpacking 566MB will be freed.
```
7

aptitude remove $(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)}')

__ · 2010-12-11 11:38:15 7
Terminal Keyboard Shortcut list

This command will give you a list of available keyboard shortcuts according to stty. Show Sample Output
This is sample output - yours may be different.
```
Terminal shortcut keys

intr=Ctrl+C
quit=Ctrl+\
erase=Ctrl+?
kill=Ctrl+U
eof=Ctrl+D
eol=Shift+Ctrl+?
eol2=Shift+Ctrl+?
swtch=Shift+Ctrl+?
start=Ctrl+Q
stop=Ctrl+S
susp=Ctrl+Z
rprnt=Ctrl+R
werase=Ctrl+W
lnext=Ctrl+V
flush=Ctrl+O
```
7

echo -e "Terminal shortcut keys\n" && sed -e 's/\^/Ctrl+/g;s/M-/Shift+/g' <(stty -a 2>&1| sed -e 's/;/\n/g' | grep "\^" | tr -d ' ')

cicatriz · 2011-02-10 17:38:05 5

simulated text generator

tr -dc a-z0-9 </dev/urandom | tr 0-8 \ | tr 9 \\n | sed 's/^[ \t]*//' | fmt -u

rubenmoran · 2011-02-19 10:29:17 12

Remove comments from files

Use sed to remove comments from a file. In this example the comments begin with #. The command '/^#/d' remove line starting with #. The command 's/#.*$//' remove comments at end of lines.
This is sample output - yours may be different.
7

sed -e '/^#/d' -e 's/#.*$//' in

agambier · 2012-01-25 15:05:57 76
Search commandlinefu and view syntax-highlighted results in vim

Here is the full function (got trunctated), which is much better and works for multiple queries. function cmdfu () { local t=~/cmdfu; until [[ -z $1 ]]; do echo -e "\n# $1 {{{1" >> $t; curl -s "commandlinefu.com/commands/matching/$1/`echo -n $1|base64`/plaintext" | sed '1,2d;s/^#.*/& {{{2/g' | tee -a $t > $t.c; sed -i "s/^# $1 {/# $1 - `grep -c '^#' $t.c` {/" $t; shift; done; vim -u /dev/null -c "set ft=sh fdm=marker fdl=1 noswf" -M $t; rm $t $t.c } Searches commandlinefu for single/multiple queries and displays syntax-highlighted, folded, and numbered results in vim. Show Sample Output
This is sample output - yours may be different.
```
$ cmdfu mkfifo vim

# mkfifo - 7 {{{1
+---  3 lines: Share your terminal session real-time ---
+---  3 lines: execute a shell with netcat without -e ---
...

# vim - 25 {{{1
+---  3 lines: vim read stdin ---
+---  3 lines: Search commandlinefu.com and display with VIMs syntax highlighting! ---
...
```
7

cmdfu(){ local t=~/cmdfu;echo -e "\n# $1 {{{1">>$t;curl -s "commandlinefu.com/commands/matching/$1/`echo -n $1|base64`/plaintext"|sed '1,2d;s/^#.*/& {{{2/g'>$t;vim -u /dev/null -c "set ft=sh fdm=marker fdl=1 noswf" -M $t;rm $t; }

AskApache · 2012-02-21 05:43:16 11
Insert a colon between every two digits

I sometimes have large files of MAC addresses stored in a file, some databases need the information stored with the semicolon (makes for easier programming a device) others don't. I have a barcode to text file scanner which usually butchers MAC addresses so this was the fix> I initially did this in awk ;) awk '{for(i=10;i>=2;i-=2)$0=substr($0,1,i)":"substr($0,i+1);print}' mac_address_list Show Sample Output
This is sample output - yours may be different.
```
more mac_address_list && sed 's/$..$/\1:/g;s/:$//' mac_address_list
000000abde00


00:00:00:ab:de:00
```
6

sed 's/$..$/\1:/g;s/:$//' mac_address_list

sil · 2009-02-18 14:38:37 7
See the 10 programs the most used
This is sample output - yours may be different.
6

sed -e "s/| /\n/g" ~/.bash_history | cut -d ' ' -f 1 | sort | uniq -c | sort -nr | head

erdnaxeli · 2009-02-21 16:17:41 5
See how many % of your memory firefox is using
This is sample output - yours may be different.
6

ps -o %mem= -C firefox-bin | sed -s 's/\..*/%/'

susannakaukinen · 2009-03-06 21:09:26 10
Smart renaming

A powerfull way to rename file using sed groups. & stand for the matched expression. \1 referes to the first group between parenthesis. \2 to the second. Show Sample Output
This is sample output - yours may be different.
```
Produce commands like:
mv banana_train_data_1.asc banana_1_train_data.asc
```
6

ls | sed -n -r 's/banana_(.*)_([0-9]*).asc/mv & banana_\2_\1.asc/gp' | sh

log0 · 2009-04-28 17:53:58 6
Monitor logs in Linux using Tail

Works in Ubuntu, I hope it will work on all Linux machines. For Unixes, tail should be capable of handling more than one file with '-f' option. This command line simply take log files which are text files, and not ending with a number, and it will continuously monitor those files. Putting one alias in .profile will be more useful.
This is sample output - yours may be different.
6

find /var/log -type f -exec file {} \; | grep 'text' | cut -d' ' -f1 | sed -e's/:$//g' | grep -v '[0-9]$' | xargs tail -f

mohan43u · 2009-06-03 09:47:08 11
Delete all but latest file in a directory

Useful for deleting old unused log files.
This is sample output - yours may be different.
6

ls -pt1 | sed '/.*\//d' | sed 1d | xargs rm

patko · 2009-07-29 13:59:58 7
Regex to remove HTML-Tags from a file

This regular expression removes all HTML-Tags from the file.
This is sample output - yours may be different.
6

sed -e :a -e 's/<[^>]*>//g;/</N;//ba' index.html

dstiller · 2009-08-14 09:55:00 4
Short Information about loaded kernel modules

I modify 4077 and marssi commandline to simplify it and skip an error when parsing the first line of lsmod (4077). Also, it's more concise and small now. I skip using xargs ( not required here ). This is only for GNU sed. For thoses without GNU sed, use that : modinfo $(lsmod | awk 'NR>1 {print $1}') | sed -e '/^dep/s/$/\n/g' -e '/^file/b' -e '/^desc/b' -e '/^dep/b' -e d
This is sample output - yours may be different.
6

modinfo $(cut -d' ' -f1 /proc/modules) | sed '/^dep/s/$/\n/; /^file\|^desc\|^dep/!d'

sputnick · 2009-11-18 23:40:46 4
Show git branches by date - useful for showing active branches
This is sample output - yours may be different.
6

for k in `git branch|sed s/^..//`;do echo -e `git log -1 --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" "$k"`\\t"$k";done|sort

unixmonkey7740 · 2010-01-06 18:35:29 6
Query Wikipedia via console over DNS
This is sample output - yours may be different.
6

mwiki () { blah=`echo $@ | sed -e 's/ /_/g'`; dig +short txt $blah.wp.dg.cx; }

oshazard · 2010-01-16 07:13:43 3
Google Spell Checker

I took matthewbauer's cool one-liner and rewrote it as a shell function that returns all the suggestions or outputs "OK" if it doesn't find anything wrong. It should work on ksh, zsh, and bash. Users that don't have tee can leave that part off like this: spellcheck(){ typeset y=$@;curl -sd "<spellrequest><text>$y</text></spellrequest>" https://google.com/tbproxy/spell|sed -n '/s="[1-9]"/{s/<[^>]*>/ /g;s/\t/ /g;s/ *$.*$/Suggestions: \1\n/g;p}';} Show Sample Output
This is sample output - yours may be different.
```
$ spellcheck motaive
Suggestions: motive motives mutative emotive motif

$ spellcheck now is the winter of our dicontent
Suggestions: discontent content contend

$ spellcheck panoply
OK
```
6

spellcheck(){ typeset y=$@;curl -sd "<spellrequest><text>$y</text></spellrequest>" https://www.google.com/tbproxy/spell|sed -n '/s="[0-9]"/{s/<[^>]*>/ /g;s/\t/ /g;s/ *$.*$/Suggestions: \1\n/g;p}'|tee >(grep -Eq '.*'||echo -e "OK");}

eightmillion · 2010-02-17 08:20:48 17
Save xkcd to a pdf with captions

Saves to a PDF with title and alt text of comic. As asked for on http://bbs.archlinux.org/viewtopic.php?id=91100 Change xkcd.com to dynamic.xkcd.com/comics/random for a random comic.
This is sample output - yours may be different.
6

curl -sL xkcd.com | grep '<img [^>]*/><br/>' | sed -r 's|<img src="(.*)" title="(.*)" alt="(.*)" /><br/>|\1\t\2\t\3|' > /tmp/a; curl -s $(cat /tmp/a | cut -f1) | convert - -gravity south -draw "text 0,0 \"$(cat /tmp/a | cut -f2)\"" pdf:- > xkcd.pdf

matthewbauer · 2010-03-03 03:41:31 14
View the newest xkcd comic.
This is sample output - yours may be different.
6

eog `curl -s http://xkcd.com/ | sed -n 's/<h3>Image URL.*: $.*$<\/h3>/\1/p'`

bluesman · 2010-08-31 13:23:21 5
Google URL shortener

Use curl and sed to shorten an URL using goo.gl without any other api Show Sample Output
This is sample output - yours may be different.
```
curl -s -d'&url=www.google.com' http://goo.gl/api/url | sed -e 's/{"short_url":"//' -e 's/","added_to_history":false}/\n/'

http://goo.gl/fbsS
```
6

curl -s -d'&url=URL' http://goo.gl/api/url | sed -e 's/{"short_url":"//' -e 's/","added_to_history":false}/\n/'

Soubsoub · 2010-10-01 23:20:08 10
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Find the package that installed a command

locating packages held back, such as with "aptitude hold "

Find Duplicate Files (based on size first, then MD5 hash)

Finds duplicates based on MD5 sum. Compares only files with the same size. Performance improvements on: $find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate The new version takes around 3 seconds where the old version took around 17 minutes. The bottle neck in the old command was the second find. It searches for the files with the specified file size. The new version keeps the file path and size from the beginning.

Do a command but skip recording it in the bash command history

Note the extra space before the command (I had to put it as an underscore since the website eats up preceding spaces). That's all it takes. Now if you check your history with "$ history", it wont show up.

randomize hostname and mac address, force dhcp renew. (for anonymous networking)

this string of commands will release your dhcp address, change your mac address, generate a new random hostname and then get a new dhcp lease.

add the result of a command into vi

in command mode, navigate your cursor to the line where you want the command output to appear, and hit "!!". No need to enter edit mode or even type a ":" (colon).

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

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)

sort lines by length

Show recent earthquakes in Bay Area

To see only earthquakes for today, add another pipe to egrep "`date '+%Y/%m/%d'`"

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Commands using sed (1,319)

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