Commands using sed (1,319)

  • Get Lorum Ipsum random text from lorumipsum.com

    This will generate 3 paragraphs with random text. Change the 3 to any number. Show Sample Output


    5
    lynx -source http://www.lipsum.com/feed/xml?amount=3|perl -p -i -e 's/\n/\n\n/g'|sed -n '/<lipsum>/,/<\/lipsum>/p'|sed -e 's/<[^>]*>//g'
    houghi · 2010-04-26 17:26:44 5
  • Prepare a commandlinefu command.

    This command will format your alias or function to a single line, trimming duplicate white space and newlines and inserting delimiter semi-colons, so it continues to work on a single line. Show Sample Output


    5
    goclf() { type "$1" | sed '1d' | tr -d "\n" | tr -s '[:space:]'; echo }
    meathive · 2010-06-26 21:44:17 17
  • Get all shellcode on binary file from objdump

    Tired copy paste to get opcode from objdump huh ? Get more @ http://gunslingerc0de.wordpress.com Show Sample Output


    5
    objdump -d ./PROGRAM|grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'
    gunslinger_ · 2010-07-11 15:44:48 112
  • Convert ascii string to hex

    If you're going to use od, here's how to suppress the labels at the beginning. Also, it doesn't output the \x, hence the sed command at the end. Remove it for space separated hex values instead Show Sample Output


    5
    echo -n "text" | od -A n -t x1 |sed 's/ /\\x/g'
    camocrazed · 2010-07-14 15:31:36 8
  • Remove color codes (special characters) with sed


    5
    sed -r "s:\x1B\[[0-9;]*[mK]::g"'
    roylez · 2010-07-22 05:37:25 6
  • livehttpheaders (firefox addon) replacement

    Default output-file is "liveh.txt". This uses only BRE, in case you're using an older version of sed(1) that doesn't have support for ERE added. With a modern sed(1), to reduce false positive matches, you might do something like: liveh(){ tcpdump -lnnAs512 -i ${1-} tcp |sed 's/.*GET /GET /;s/.*Host: /Host: /;s/.*POST /POST /;/GET |Host: |POST /!d;/[\"'"'"]/d;/\.\./d;w '"${2-liveh.txt}"'' >/dev/null ;} Anyway, it's easy to clean up the output file with sed(1) later.


    5
    liveh(){ tcpdump -lnAs512 ${1-} tcp |sed ' s/.*GET /GET /;s/.*Host: /Host: /;s/.*POST /POST /;/[GPH][EOo][TSs]/!d;w '"${2-liveh.txt}"' ' >/dev/null ;} # usage: liveh [-i interface] [output-file] && firefox &
    argv · 2010-10-11 01:01:11 3
  • Google Translate

    substitute "example" with desired string; tl = target language (en, fr, de, hu, ...); you can leave sl parameter as-is (autodetection works fine) Show Sample Output


    5
    wget -U "Mozilla/5.0" -qO - "http://translate.google.com/translate_a/t?client=t&text=translation+example&sl=auto&tl=fr" | sed 's/\[\[\[\"//' | cut -d \" -f 1
    sairon · 2011-03-06 13:46:16 109
  • remove empty lines in place with backup

    Modify file in place to remove empty lines and create a backup of the original with the extension .bak Show Sample Output


    5
    sed -e '/^$/d' -i .bak filewithempty.lines
    donnoman · 2011-03-24 00:03:25 6
  • Get a BOFH excuse

    Gets a BOFH excuse from the BOFH excuse server (towel.blinkenlights.nl port 666), and passes it through sed and tr to get rid of telnet connection stuff. Show Sample Output


    5
    telnet towel.blinkenlights.nl 666 | sed "s/=== The BOFH Excuse Server ===//" | tr -d '\n' && echo
    hintss · 2011-03-31 05:50:57 3
  • Get International Space Station sighting information for your city

    This command outputs a table of sighting opportunities for the International Space Station. Find the URL for your city here: http://spaceflight.nasa.gov/realdata/sightings/ Show Sample Output


    5
    links -dump "http://spaceflight.nasa.gov/realdata/sightings/cities/view.cgi?country=United_States&region=Wisconsin&city=Portage" | sed -n '/--/,/--/p'
    eightmillion · 2011-05-03 12:15:56 7
  • full memcache client in under 255 chars (uses dd, sed and nc)

    usage: mem memcache-command [arguments] where memcache-command might be: set add get[s] append prepend replace delete incr decr cas stats verbosity version notes: exptime argument is set to 0 (no expire) flags argument is set to 1 (arbitrary)


    5
    mem(){ { case $1 in st*|[vgid]*) printf "%s " "$@";; *) dd if=$3 2>&1|sed '$!d;/^0/d;s/ .*//;s/^/'"$1"' '"$2"' 1 0 /; r '"$3"'' 2>/dev/null;;esac;printf "\r\nquit\r\n";}|nc -n 127.0.0.1 11211; }
    argv · 2011-06-17 06:39:07 6
  • Prepend a text to a file.

    Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.


    5
    sed -i '1s/^/text to prepend\n/' file1
    xeor · 2011-06-25 12:02:11 14
  • Search and Replace across multiple files

    - grep for the word in a files, use recursion (to find files in sub directories), and list only file matches -| xargs passes the results from the grep command to sed -sed -i uses a regular expression (regex) to evaluate the change: s (search) / search word / target word / g (global replace)


    5
    grep -lr -e '<oldword>' * | xargs sed -i 's/<oldword>/<newword>/g'
    o0110o · 2011-08-27 02:42:51 7
  • regex for turning a URL into a real hyperlink (i.e. for posting somewhere that accepts basic html)

    This should work with anything://url.whatever etc etc ;)


    5
    sed "s/\([a-zA-Z]*\:\/\/[^ ]*\)\(.*\)/\<a href=\"\1\"\>\1\<\/a\>\2/"
    c3w · 2012-01-04 02:08:29 7
  • Use top to monitor only all processes with the same name fragment 'foo'

    pgrep foo may return several pids for process foobar footy01 etc. like this: 11427 12576 12577 sed puts "-p " in front and we pass a list to top: top -p 11427 -p 12576 -p 12577


    5
    top $(pgrep foo | sed 's|^|-p |g')
    michelsberg · 2012-06-14 15:13:00 3
  • run shell with your commandlinefu.com's favourites as bash_history

    This makes your commandlinefu.com's favorites appear as most recent commands in your history.


    5
    (cat ~/.bash_history;U='curl -s www.commandlinefu.com';$U/users/signin -c/tmp/.c -d'username=<USER>&password=<PASS>&submit=1'|$U/commands/favourites/json -b/tmp/.c|grep -Po 'nd":.*?[^\\]",'|sed -re 's/.*":"(.*)",/\1/g')>~/.h;HISTFILE=~/.h bash --login
    xenomuta · 2012-08-17 12:31:51 34
  • Encrypt and password-protect execution of any bash script

    (Please see sample output for usage) script.bash is your script, which will be crypted to script.secure script.bash --> script.secure You can execute script.secure only if you know the password. If you die, your script dies with you. If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string). Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner. Show Sample Output


    5
    echo "eval \"\$(dd if=\$0 bs=1 skip=XX 2>/dev/null|gpg -d 2>/dev/null)\"; exit" > script.secure; sed -i s:XX:$(stat -c%s script.secure): script.secure; gpg -c < script.bash >> script.secure; chmod +x script.secure
    rodolfoap · 2013-03-09 11:16:48 20
  • Graphically show percent of mount space used

    Automatically drops mount points that have non-numeric sizes (e.g. /proc). Tested in bash on Linux and AIX. Show Sample Output


    5
    for m in `df -P | awk -F ' ' '{print $NF}' | sed -e "1d"`;do n=`df -P | grep "$m$" | awk -F ' ' '{print $5}' | cut -d% -f1`;i=0;if [[ $n =~ ^-?[0-9]+$ ]];then printf '%-25s' $m;while [ $i -lt $n ];do echo -n '=';let "i=$i+1";done;echo " $n";fi;done
    drockney · 2013-07-29 20:12:39 6
  • Convert a script to one-liner

    Opposite: Convert an one-liner to script: foo() { <one-liner> ; } ... typeset -f foo ... unset -f foo


    5
    (sed 's/#.*//g'|sed '/^ *$/d'|tr '\n' ';'|xargs echo) < script.sh
    knoppix5 · 2013-10-26 23:23:51 16
  • Shows cpu load in percent

    Show the current load of the CPU as a percentage. Read the load from /proc/loadavg and convert it using sed: Strip everything after the first whitespace: sed -e 's/ .*//' Delete the decimal point: sed -e 's/\.//' Remove leading zeroes: sed -e 's/^0*//' Show Sample Output


    5
    sed -e 's/ .*//' -e 's/\.//' -e 's/^0*//' /proc/loadavg
    flatcap · 2014-04-18 19:12:05 10
  • Get simple weather info from a zip code

    weather 97405 Show Sample Output


    5
    weather() { curl -s "http://www.wunderground.com/q/zmw:$1.1.99999" | grep "og:title" | cut -d\" -f4 | sed 's/&deg;/ degrees F/'; }
    cadejscroggins · 2015-09-19 07:57:47 12
  • Change every instance of OLD to NEW in file FILE

    Very quick way to change a word in a file. I use it all the time to change variable names in my PHP scripts (sed -i 's/$oldvar/$newvar/g' index.php)


    4
    sed -i 's/OLD/NEW/g' FILE
    nanexcool · 2009-02-05 18:07:41 26
  • Delete line number 10 from file

    Very useful when the ssh key of a host has changed and ssh refuses to connect to the machine, while giving you the line number that has changed in ~/.ssh/known_hosts.


    4
    sed -i '10d' <somefile>
    raphink · 2009-02-16 15:05:29 127
  • remove leading blank lines


    4
    sed '/./,$!d'
    grep · 2009-02-16 20:39:40 9
  • Convert Unix newlines to DOS newlines

    The ctrl+v,ctrl+m portion represents key presses that you should do. If you do it successfully you should see a ^M character appear.


    4
    sed 's/$/<ctrl+v><ctrl+m>/'
    SiegeX · 2009-02-16 20:53:05 12
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draw line separator (using knoppix5 idea)
This is a slightly modified version of the knoppix5 user oneliner (https://www.commandlinefu.com/commands/view/24571/draw-line-separator).

Sort lines using the Xth characted as the start of the sort string
Tells sort to ignore all characters before the Xth position in the first field per line. If you have a list of items one per line and want to ignore the first two characters for sorting purposes, you would type "sort -k1.3". Change the "1" to change the field being sorted. The decimal value is the offset in the specified field to sort by.

Extract title from HTML files
This command can be used to extract the title defined in HTML pages

Install pip with Proxy
Installs pip packages defining a proxy

Bash prompt with user name, host, history number, current dir and just a touch of color
I put that line in my .bash_profile (OS X) and .bashrc (Linux). Here is a summary of what the \char means: n=new line, u=user name, h=host, !=history number, w=current work directory The \[\e[32m\] sequence set the text to bright green and \[\e[0m\] returns to normal color. For more information on what you can set in your bash prompt, google 'bash prompt'

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"

Colorize grep output

Create a file of a given size in linux
If you're trying to create a sparse file, you can use dd by 'skip'ing to the last block instance. ls -ls shows the actual size vs. the reported size

Command line calculator
This opens a python command line. You can use math and random and float-division is enabled (without appending .0 to integers). I just don't know how to specify a standard precision.

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

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