Commands using sed (1,319)

  • return external ip

    alternative using 'host' Show Sample Output


    -1
    host -t a dartsclink.com | sed 's/.*has address //'
    dartsclink · 2009-08-14 16:11:18 13
  • Recreate all initrd files

    Do this with caution.


    -1
    for kern in $(grep "initrd " /boot/grub/grub.conf|grep -v ^#|cut -f 2- -d-|sed -e 's/\.img//g'); do mkinitrd -v -f /boot/initrd-$kern.img $kern; done
    oernii2 · 2009-08-19 09:53:29 502
  • Reverse DNS lookups

    Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt


    -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
  • dig this


    -1
    for dnsREC in $(curl -s http://www.iana.org/assignments/dns-parameters |grep -Eo ^[A-Z\.]+\ |sed 's/TYPE//'); do echo -n "$dnsREC " && dig +short $dnsREC IANA.ORG; done
    commandlinefu · 2009-09-01 03:11:18 3
  • search for a file in PATH

    search argument in PATH accept grep expressions without args, list all binaries found in PATH Show Sample Output


    -1
    function sepath { echo $PATH |tr ":" "\n" |sort -u |while read L ; do cd "$L" 2>/dev/null && find . \( ! -name . -prune \) \( -type f -o -type l \) 2>/dev/null |sed "s@^\./@@" |egrep -i "${*}" |sed "s@^@$L/@" ; done ; }
    mobidyc · 2009-09-11 15:03:22 5
  • 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


    -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
  • get Hong Kong weather infomation from HK Observatory

    From Hong Kong Observatory wap site ;) Show Sample Output


    -1
    wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | grep -v '^$'
    twfcc · 2009-09-25 02:21:05 6
  • get Hong Kong weather infomation from HK Observatory

    "get Hong Kong weather infomation from HK Observatory From Hong Kong Observatory wap site ;)" other one showed alot of blank lines for me Show Sample Output


    -1
    wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | tail -n4
    dakunesu · 2009-09-25 02:36:46 3
  • Prints per-line contribution per author for a GIT repository

    You'll run into trouble if you have files w/ missing newlines at the end. I tried to use PAGER='sed \$q' git blame and even PAGER='sed \$q' git -p blame to force a newline at the end, but as soon as the output is redirected, git seems to ignore the pager.


    -1
    git ls-files | while read i; do git blame $i | sed -e 's/^[^(]*(//' -e 's/^\([^[:digit:]]*\)[[:space:]]\+[[:digit:]].*/\1/'; done | sort | uniq -ic | sort -nr
    pipping · 2009-10-25 09:40:01 4
  • get ^DJI


    -1
    getdji (){local url sedcmd;url='http://finance.yahoo.com/q?d=t&s=^DJI';sedcmd='/(DJI:.*)/,/Day.*/!d;s/^ *//g;';sedcmd="$sedcmd/Change:/s/Down / -/;/Change:/s/Up / +/;";sedcmd="$sedcmd/Open:/s//& /";lynx -dump "$url" | sed "$sedcmd"; }
    twfcc · 2009-10-26 09:00:18 5
  • Get column names in MySQL

    Useful when you need to write e.g. an INSERT for a table with a large number of columns. This command will retrieve the column names and comma-separate them ready for INSERT INTO(...), removing the last comma.


    -1
    mysql -u <user> --password=<password> -e "SHOW COLUMNS FROM <table>" <database> | awk '{print $1}' | tr "\n" "," | sed 's/,$//g'
    maxmanders · 2009-10-29 13:42:17 3
  • Get your external IP address with the best commandlinefu.com command

    This command uses the top voted "Get your external IP" command from commandlinefu.com to get your external IP address. Use this and you will always be using the communities favourite command. This is a tongue-in-cheek entry and not recommended for actual usage.


    -1
    eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')
    jgc · 2009-11-04 16:58:31 6
  • Show Network IP and Subnet

    same thing as the other


    -1
    ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\//g') | awk '/Network/ { print $2 } '
    solarislackware · 2009-12-05 15:00:32 3
  • Extract all urls from the last firefox sessionstore.js file used.


    -1
    sed -e 's/{"url":/\n&/g' ~/.mozilla/firefox/*/sessionstore.js | cut -d\" -f4
    cfajohnson · 2009-12-10 04:31:31 4
  • prints line numbers

    There's too many options to number, My curiosity has forced me to make it using only sed. Maybe useful... or not... :-S


    -1
    sed '/./=' infile | sed '/^/N; s/\n/ /'
    glaudiston · 2009-12-10 16:24:56 6
  • 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


    -1
    sed = <file> | sed 'N;s/\n/\t/'
    jgc · 2009-12-11 14:39:14 3
  • Add a line to crontab using sed

    I needed to add a line to my crontab from within a script and didn't want to have to write my own temporary file. You may find you need to reload the crond after this to make the change take effect. e.g.: if [ -x /sbin/service ] then /sbin/service crond reload else CRON_PID=`ps -furoot | awk '/[^a-z]cron(d)?$/{print $2}'` if [ -n "$CRON_PID" ] then kill -HUP $CRON_PID fi fi The reason I had CRON_HOUR and CRON_MINS instead of numbers is that I wanted to generate a random time between midnight & 6AM to run the job, which I did with: CRON_HOUR=`/usr/bin/perl -e 'printf "%02d\n", int(rand(6))'` CRON_MINS=`/usr/bin/perl -e 'printf "%02d\n", int(rand(60));'`


    -1
    crontab -l | sed -e '$G;$s-$-'"$CRON_MINS $CRON_HOUR"' * * * /usr/bin/command >/dev/null 2>&1-' | crontab -
    JohnGH · 2010-01-07 11:00:05 6
  • wget, tar xzvf, cd, ls

    Combines a few repetitive tasks when compiling source code. Especially useful when a hypen in a file-name breaks tab completion. 1.) wget source.tar.gz 2.) tar xzvf source.tar.gz 3.) cd source 4.) ls From there you can run ./configure, make and etc. Show Sample Output


    -1
    wtzc () { wget "$@"; foo=`echo "$@" | sed 's:.*/::'`; tar xzvf $foo; blah=`echo $foo | sed 's:,*/::'`; bar=`echo $blah | sed -e 's/\(.*\)\..*/\1/' -e 's/\(.*\)\..*/\1/'`; cd $bar; ls; }
    oshazard · 2010-01-17 11:25:47 3
  • keep an eye on system load changes


    -1
    watch -n 7 -d 'uptime | sed s/.*users?, //'
    matthewbauer · 2010-01-17 18:45:52 3
  • Rename all the files in the current directory into their sha1sum


    -1
    find . -maxdepth 1 -type f| xargs sha1sum | sed 's/^\(\w*\)\s*\(.*\)/\2 \1/' | while read LINE; do mv $LINE; done
    foremire · 2010-01-25 20:21:01 11
  • Delete all but latest file in a directory

    xargs deals badly with special characters (such as space, ' and "). To see the problem try this: touch important_file touch 'not important_file' ls not* | xargs rm Parallel https://savannah.nongnu.org/projects/parallel/ does not have this problem.


    -1
    ls -t1 | sed 1d | parallel -X rm
    unixmonkey8046 · 2010-01-28 12:28:18 3
  • Weather on the Command line

    Will return temperature in Fahrenheit of a location (New York City in example). Uses a Google API. Show Sample Output


    -1
    curl -s "http://www.google.com/ig/api?weather=New%20York" | sed 's|.*<temp_f data="\([^"]*\)"/>.*|\1|'
    matthewbauer · 2010-02-08 23:06:48 5
  • Get Google Reader unread count

    Get Google Reader unread count from the command line. You'll have to define your auth token with $auth Or use: curl -s -H "Authorization: GoogleLogin auth=$(curl -sd "Email=$email&Passwd=$password&service=reader" https://www.google.com/accounts/ClientLogin | grep Auth | sed 's/Auth=\(.*\)/\1/')" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bc Show Sample Output


    -1
    curl -s -H "Authorization: GoogleLogin auth=$auth" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bc
    matthewbauer · 2010-02-11 00:42:57 7
  • Bold matching string without skipping others


    -1
    sed 's/pattern/^[[1m&^[[0m/g'
    rmcb · 2010-02-12 14:05:34 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.


    -1
    ls -d */* | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs mv -t $(pwd)
    leovailati · 2010-03-01 23:43:26 6
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Generate a Random MAC address
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Find unused IPs on a given subnet
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List files in directory tree with newest last

grep apache access.log and list IP's by hits and date - sorted

Exclude inserting a table from a sql import
Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

list files recursively by size

Merge files, joining each line in one line

delay execution of a command that needs lots of memory and CPU time until the resources are available
[ 2000 -ge "$(free -m | awk '/buffers.cache:/ {print $4}')" ] returns true if less than 2000 MB of RAM are available, so adjust this number to your needs. [ $(echo "$(uptime | awk '{print $10}' | sed -e 's/,$//' -e 's/,/./') >= $(grep -c ^processor /proc/cpuinfo)" | bc) -eq 1 ] returns true if the current machine load is at least equal to the number of CPUs. If either of the tests returns true we wait 10 seconds and check again. If both tests return false, i.e. 2GB are available and machine load falls below number of CPUs, we start our command and save it's output in a text file. The ( ( ... ) & ) construct lets the command run in background even if we log out. See http://www.commandlinefu.com/commands/view/3115/ .

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