Commands tagged sed sorted by votes

Commands tagged sed (376)

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Expand shell variables in sed scripts

With this command you can use shell variables inside sed scripts. This is useful if the script MUST remain in an external file, otherwise you can simply use an inline -e argument to sed.
This is sample output - yours may be different.
-1

expanded_script=$(eval "echo \"$(cat ${sed_script_file})\"") && sed -e "${expanded_script}" your_input_file

giuseppe_rota · 2009-05-07 14:21:14 5
Reverse DNS lookups

Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt
This is sample output - yours may be different.
-1

sed 's/$[0-9]*$\.$[0-9]*$\.$[0-9]*$\.$[0-9]*$.in-addr.arpa domain name pointer$.*$\./\4.\3.\2.\1\5/' \ lookups.txt

hemanth · 2009-08-22 09:37:20 4
Print all members of US House of Representatives

Uses curl to download page of membership of US Congress. Use sed to strip HTML then perl to print a line starting with two tabs (a line with a representative) Show Sample Output
This is sample output - yours may be different.
```
curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 
  's/<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and 
  print;' > DefeatedIn2010.txt

#Fills a file called "DefeatedIn2010.txt" with the name of every member of congress.
```
-1

curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 's/<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and print;'

drewk · 2009-09-24 23:37:36 15
Print line numbers

Print out contents of file with line numbers. This version will print a number for every line, and separates the numbering from the line with a tab. Show Sample Output
This is sample output - yours may be different.
```
1     This is line 1.
2     This is line 2.
3
4     This is line 4.
```
-1

sed = <file> | sed 'N;s/\n/\t/'

jgc · 2009-12-11 14:39:14 3
Move itens from subdirectories to current directory

You WILL have problems if the files have the same name. Use cases: consolidate music library and unify photos (especially if your camera separates images by dates). After running the command and verifying if there was no name issues, you can use ls -d */ | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs rm -r to remove now empty subdirectories.
This is sample output - yours may be different.
-1

ls -d */* | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs mv -t $(pwd)

leovailati · 2010-03-01 23:43:26 6
Bash function to see if the day ends in

The shell has perfectly adequate pattern matching for simple expressions. Show Sample Output
This is sample output - yours may be different.
```
ok
```
-1

function ends_in_y() { case $(date +%A) in *y ) true ;; * ) false ;; esac } ; ends_in_y && echo ok

unixmonkey9199 · 2010-04-06 22:18:52 3
Change the homepage of Chromium
This is sample output - yours may be different.
-1

change-homepage(){ sed -ri 's|( "homepage": ").*(",)|\1'"$@"'\2|' .config/chromium/Default/Preferences; }

matthewbauer · 2010-04-10 21:21:55 3
Find and delete thunderbird's msf files to make your profile work quickly again.

The thunderbird message datastores get corrupt some times causing random failures, compaction to fail and general suck in thunderbird. Removing them causes thunderbird to rebuild the indexes and makes things quick again.
This is sample output - yours may be different.
-1

find ~/.thunderbird/*.default/ -name *.msf | sed 's/ /\\ /g' | xargs rm {} \;

allrightname · 2010-06-04 12:35:24 6
Get the amount of currently registered users from i18n.counter.li.org.
This is sample output - yours may be different.
-1

wget -qO - http://i18n.counter.li.org/ | grep 'users registered' | sed 's/.*\<font size=7\>//g' | tr '\>' ' ' | sed 's/<br.*//g' | tr ' ' '\0'

hunterm · 2010-10-07 03:19:17 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
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
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
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
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 81
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
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
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
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
Uptime in minute

Get info directly from /proc/uptime
This is sample output - yours may be different.
-1

awk '{print $0/60;}' /proc/uptime

ioggstream · 2011-08-31 10:41:21 17
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
Print just line 4 from a textfile

Perl version - just for completeness sake ;)
This is sample output - yours may be different.
-1

perl -ne '$. == 4 && print && exit'

bashrc · 2011-09-05 21:52:16 3
Remove trailing whitespaces (or tabs) from a text file

This command is useful when you are programming, for example.
This is sample output - yours may be different.
-1

sed -i 's/[ \t]\+$//g' file.txt

elder · 2011-09-07 01:47:44 9
ssh hostchange know_host improver

If you work in an environment, where some ssh hosts change regularly this might be handy...
This is sample output - yours may be different.
-1

sshostnew () {sed -i "$1d" $HOME/.ssh/known_hosts ; }

_john · 2011-11-07 10:33:04 10
Remove superfluous from conf file

Use it with cat and '|' for know what is used in a conf file. For example cat /etc/squid/squid.conf | sed -re '/^#/d ; s/#.*$// ; /^\s$/d' : Show you what you use in your file conf. It removes all comments and empty lines. Empty lines are lines with nothing, a tab, or a space.
This is sample output - yours may be different.
-1

sed -re '/^#/d ; s/#.*$// ; /^\s*$/d'

Zulu · 2012-02-02 18:12:52 4
Convert an UNIX file to a DOS file.

This permit to convert an UNIX file to DOS file. You can use it in a loop to convert multiple files, like : for i in *.bat; do sed -i 's/$/\r/' $i; done
This is sample output - yours may be different.
-1

sed -i 's/$/\r/' file

evolix · 2012-02-23 08:34:30 6
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convert a web page into a png

This requires the command-line print extension (see #2861 for more details). I use it to make up complex images with formatted text using CSS and whatnot. It's a lot slicker than imagemagick for certain things. Now imagine using a local webserver with PHP and a database to generate the images. Oh, the possibilities...

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" }

Send a signed and encrypted email from the command line

A very simple command to send a signed and encrypted message from the command line using GPG Keys

Paste OS X clipboard contents to a file on a remote machine

Redirects the contents of your clipboard through a pipe, to a remote machine via SSH.

Find and display most recent files using find and perl

This pipeline will find, sort and display all files based on mtime. This could be done with find | xargs, but the find | xargs pipeline will not produce correct results if the results of find are greater than xargs command line buffer. If the xargs buffer fills, xargs processes the find results in more than one batch which is not compatible with sorting. Note the "-print0" on find and "-0" switch for perl. This is the equivalent of using xargs. Don't you love perl? Note that this pipeline can be easily modified to any data produced by perl's stat operator. eg, you could sort on size, hard links, creation time, etc. Look at stat and just change the '9' to what you want. Changing the '9' to a '7' for example will sort by file size. A '3' sorts by number of links.... Use head and tail at the end of the pipeline to get oldest files or most recent. Use awk or perl -wnla for further processing. Since there is a tab between the two fields, it is very easy to process.

Don't save commands in bash history (only for current session)

Unsetting HISTFILE avoid getting current session history list saved.

Find the processes that are on the runqueue. Processes with a status of

Want to know why your load average is so high? Run this command to see what processes are on the run queue. Runnable processes have a status of "R", and commands waiting on I/O have a status of "D". On some older versions of Linux may require -emo instead of -eo. On Solaris: ps -aefL -o s -o user -o comm | egrep "^O|^R|COMMAND"

Display a list of RPMs installed on a particular date

Find out which RPMs were installed on a particular date. These would (naturally) include update RPMs. This example shows searching for "Thu 05 Mar" (with grep). Alternatively, pipe it to less so you can search inside less (with less's neat text highlighting of the search term): rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | less # (this example) search term: Thu 05 Mar

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"

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Commands tagged sed (376)

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