Commands using sed (1,319)

  • Extract title from HTML files

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


    3
    sed -n 's/.*<title>\(.*\)<\/title>.*/\1/ip;T;q' file.html
    octopus · 2010-04-19 07:41:10 4
  • Produces a list of when your domains expire

    Create a text file called domainlist.txt with a domain per line, then run the command above. All registries are a little different, so play around with the command. Should produce a list of domains and their expirations date. I am responsible for my companies domains and have a dozen or so myself, so this is a quick check if I overlooked any.


    3
    cat domainlist.txt | while read line; do echo -ne $line; whois $line | grep Expiration ; done | sed 's:Expiration Date::'
    netsaint · 2010-05-02 06:49:09 6
  • View advanced Sort options, Quick Reference Help Alias

    Once you get into advanced/optimized scripts, functions, or cli usage, you will use the sort command alot. The options are difficult to master/memorize however, and when you use sort commands as much as I do (some examples below), it's useful to have the help available with a simple alias. I love this alias as I never seem to remember all the options for sort, and I use sort like crazy (much better than uniq for example). # Sorts by file permissions find . -maxdepth 1 -printf '%.5m %10M %p\n' | sort -k1 -r -g -bS 20% 00761 drwxrw---x ./tmp 00755 drwxr-xr-x . 00701 drwx-----x ./askapache-m 00644 -rw-r--r-- ./.htaccess # Shows uniq history fast history 1000 | sed 's/^[0-9 ]*//' | sort -fubdS 50% exec bash -lxv export TERM=putty-256color Taken from my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output


    3
    alias sorth='sort --help|sed -n "/^ *-[^-]/s/^ *\(-[^ ]* -[^ ]*\) *\(.*\)/\1:\2/p"|column -ts":"'
    AskApache · 2010-06-10 21:30:31 9
  • STAT Function showing ALL info, stat options, and descriptions

    This shows every bit of information that stat can get for any file, dir, fifo, etc. It's great because it also shows the format and explains it for each format option. If you just want stat help, create this handy alias 'stath' to display all format options with explanations. alias stath="stat --h|sed '/Th/,/NO/!d;/%/!d'" To display on 2 lines: ( F=/etc/screenrc N=c IFS=$'\n'; for L in $(sed 's/%Z./%Z\n/'<<<`stat --h|sed -n '/^ *%/s/^ *%\(.\).*$/\1:%\1/p'`); do G=$(echo "stat -$N '$L' \"$F\""); eval $G; N=fc;done; ) For a similarly powerful stat-like function optimized for pretty output (and can sort by any field), check out the "lll" function http://www.commandlinefu.com/commands/view/5815/advanced-ls-output-using-find-for-formattedsortable-file-stat-info From my .bash_profile -> http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output


    3
    statt(){ C=c;stat --h|sed '/Th/,/NO/!d;/%/!d'|while read l;do p=${l/% */};[ $p == %Z ]&&C=fc&&echo ^FS:^;echo "`stat -$C $p \"$1\"` ^$p^${l#%* }";done|column -ts^; }
    AskApache · 2010-06-11 23:31:03 3
  • Show demo of toilet fonts

    Lists a sample of all installed toilet fonts Show Sample Output


    3
    find /usr/share/figlet -name *.?lf -exec basename {} \; | sed -e "s/\..lf$//" | xargs -I{} toilet -f {} {}
    unixmonkey3987 · 2010-07-13 20:12:54 5
  • List the libraries used by an application

    For example, you need to make a copy of all the libraries that a certain application uses, with this command you can list and copy them. Show Sample Output


    3
    ldd /bin/bash | awk 'BEGIN{ORS=","}$1~/^\//{print $1}$3~/^\//{print $3}' | sed 's/,$/\n/'
    cicatriz · 2010-08-06 12:18:56 5
  • enable all bash completions in gentoo

    enable each bash completion that you have installed at your system, that's very nice ;)


    3
    for x in $(eselect bashcomp list | sed -e 's/ //g' | cut -d']' -f2 | sed -e 's/\*//');do eselect bashcomp enable $x --global;sleep 0.5s;done
    chronos · 2010-09-21 00:17:26 5
  • intercept stdout/stderr of another process or disowned process

    Useful to recover a output(stdout and stderr) "disown"ed or "nohup"ep process of other instance of ssh. With the others options the stdout / stderr is intercepted, but only the first n chars. This way we can recover ALL text of stdout or stderr Show Sample Output


    3
    strace -e write=1,2 -p $PID 2>&1 | sed -un "/^ |/p" | sed -ue "s/^.\{9\}\(.\{50\}\).\+/\1/g" -e 's/ //g' | xxd -r -p
    glaudiston · 2010-10-06 19:37:39 4
  • Adjust gamma so monitor doesn't mess up your body's clock

    [UPDATE: Now works for multiple connected outputs] I woke up around midnight with an urge to do some late night hacking, but I didn't want a bright monitor screwing up my body's circadian rhythm. I've heard that at night blue (short wavelength) lights are particularly bad for your diurnal clock. That may be a bunch of hooey, but it is true that redder (longer wavelength) colors are easier on my eyes at night. This command makes the screen dimmer and adjusts the gamma curves to improve contrast, particularly darkening blues and greens (Rɣ=2, Gɣ=3, Bɣ=4). To reset your screen to normal, you can run this command: xrandr | sed -n 's/ connected.*//p' | xargs -n1 -tri xrandr --output {} --brightness 1 --gamma 1:1:1 or, more briefly, xgamma -g 1 Note: The sed part is fragile and wrong. I'm doing it this way because of a misfeature in xrandr(1), which requires an output be specified but has no programmatic way of querying available outputs. Someone needs to patch up xrandr to be shell script friendly or at least add virtual outputs named "PRIMARY" and "ALL". . Todo: Screen should dim (gradually) at sunset and brighten at sunrise. I think this could be done with a self-resubmitting at job, but I'm running into the commandlinefu 127 character limit just getting the sunrise time: wget http://aa.usno.navy.mil/cgi-bin/aa_pap.pl --post-data=$(date "+xxy=%Y&xxm=%m&xxd=%d")"&st=WA&place=Seattle" -q -O- | sed -rn 's/\W*Sunrise\W*(.*)/\1/p' I hope some clever hacker comes up with a command line interface to Google's "OneBox", since the correct time shows up as the first hit when googling for "sunrise:cityname". . [Thank you to @flatcap for the sed improvement, which is much better than the head|tail|cut silliness I had before. And thank you to @braunmagrin for pointing out that the "connected" output may not be on the second line.] Show Sample Output


    3
    xrandr | sed -n 's/ connected.*//p' | xargs -n1 -tri xrandr --output {} --brightness 0.7 --gamma 2:3:4
    hackerb9 · 2010-10-24 10:45:57 10
  • Check apache config syntax and restart or edit the file

    Checks the apache configuration syntax, if is OK then restart the service otherwise opens the configuration file with VIM on the line where the configuration fails.


    3
    ( apache2ctl -t && service apache2 restart || (l=$(apache2ctl -t 2>&1|head -n1|sed 's/.*line\s\([0-9]*\).*/\1/'); vim +$l $(locate apache2.conf | head -n1)))
    cicatriz · 2010-11-26 18:12:08 78
  • To find the uptime of each process-id of particular service or process


    3
    ps -o etime `pidof firefox` |grep -v ELAPSED | sed 's/\s*//g' | sed "s/\(.*\)-\(.*\):\(.*\):\(.*\)/\1d \2h/; s/\(.*\):\(.*\):\(.*\)/\1h \2m/;s/\(.*\):\(.*\)/\1m \2s/"
    jsymonkj · 2010-11-28 03:27:24 6
  • Watch Al Jazeera Livestream directly in mplayer #jan25

    One cannot call the high quality livestream directly, but command this gives you a session ID and the high quality stream. #egypt #jan25


    3
    mplayer $(wget -q -O - "http://europarse.real.com/hurl/gratishurl.ram?pid=eu_aljazeera&amp;file=al_jazeera_en_lo.rm" | sed -e 's#lo.rm#hi.rm#')
    torrid · 2011-01-30 14:36:37 3
  • Quick and dirty RSS

    runs an rss feed through sed replacing the closing tags with newlines and the opening tags with white space making it readable. Show Sample Output


    3
    curl --silent "FEED ADDRESS" |sed -e 's/<\/[^>]*>/\n/g' -e 's/<[^>]*>//g
    ljmhk · 2011-04-11 14:08:50 5
  • sed edit-in-place using -a option instead of -i option (no tmp file created)

    does the -i option open a tmp file? this method does not.


    3
    sedi(){ case $# in [01]|[3-9])echo usage: sedi sed-cmds file ;;2)sed -a ''"$1"';H;$!d;g;' $2 |sed -a '/^$/d;w '"$2"'' ;;esac;}
    argv · 2011-07-27 02:36:53 3
  • Go to the Nth line of file


    3
    sed -n 13p /etc/services
    onur · 2011-09-16 00:12:08 27
  • Check your unread Gmail from the command line

    Just an alternative with more advanced formating for readability purpose. It now uses colors (too much for me but it's a kind of proof-of-concept), and adjust columns. Show Sample Output


    3
    curl -u username --silent "https://mail.google.com/mail/feed/atom" | awk 'BEGIN{FS="\n";RS="(</entry>\n)?<entry>"}NR!=1{print "\033[1;31m"$9"\033[0;32m ("$10")\033[0m:\t\033[1;33m"$2"\033[0m"}' | sed -e 's,<[^>]*>,,g' | column -t -s $'\t'
    frntn · 2011-10-15 23:15:52 3
  • append empty line after every line in file.txt


    3
    sed G file.txt
    kev · 2011-10-26 15:14:24 5
  • Show UDID of iPhone

    Display the serial of the iPhone (aka UDID). Show Sample Output


    3
    lsusb -s :`lsusb | grep iPhone | cut -d ' ' -f 4 | sed 's/://'` -v | grep iSerial | awk '{print $3}'
    dakira · 2011-11-03 20:39:43 14
  • Fastest Sort. Sort Faster, Max Speed

    sort is way slow by default. This tells sort to use a buffer equal to half of the available free memory. It also will use multiple process for the sort equal to the number of cpus on your machine (if greater than 1). For me, it is magnitudes faster. If you put this in your bash_profile or startup file, it will be set correctly when bash is started. sort -S1 --parallel=2 <(echo) &>/dev/null && alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)' Alternative echo|sort -S10M --parallel=2 &>/dev/null && alias sortfast="command sort -S$(($(sed '/MemT/!d;s/[^0-9]*//g' /proc/meminfo)/1024-200)) --parallel=$(($(command grep -c ^proc /proc/cpuinfo)*2))" Show Sample Output


    3
    alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)'
    AskApache · 2012-02-28 01:34:58 6
  • Processes by CPU usage


    3
    top -b -n 1 | sed 1,6d
    mlsmaycon · 2012-03-01 13:27:55 3
  • Remove all unused kernels with apt-get

    Remove old kernels (*-generic and *-generic-pae) via apt-get on debian/ubuntu based systems. Tested on ubuntu 10.04 - 12.04.


    3
    sudo apt-get remove $(dpkg -l|awk '/^ii linux-image-/{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)}')
    mtron · 2012-08-15 10:02:12 6
  • Create a bash script from last commands

    In order to write bash-scripts, I often do the task manually to see how it works. I type ### at the start of my session. The function fetches the commands from the last occurrence of '###', excluding the function call. You could prefix this with a here-document to have a proper script-header. Delete some lines, add a few variables and a loop, and you're ready to go. This function could probably be much shorter...


    3
    quickscript () { filename="$1"; history | cut -c 8- | sed -e '/^###/{h;d};H;$!d;x' | sed '$d' > ${filename:?No filename given} }
    joedhon · 2014-02-09 12:19:29 6
  • Generat a Random MAC address

    Generate a random MAC address with capital letters


    3
    hexdump -n6 -e '/1 ":%02X"' /dev/random|sed s/^://g
    rubo77 · 2015-01-19 03:09:43 9
  • Replace + Find


    3
    find <mydir> -type f -exec sed -i 's/<string1>/<string2>/g' {} \;
    Plancton · 2015-11-12 14:47:18 16
  • Lookup autonomous systems of all outgoing http/s traffic

    Show Sample Output


    3
    ss -t -o state established '( dport = :443 || dport = :80 )'|grep tcp|awk '{ print $5 }'|sed s/:http[s]*//g|sort -u|netcat whois.cymru.com 43|grep -v "AS Name"|sort -t'|' -k3
    koppi · 2016-04-07 01:48:44 16
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Using this command you can track a moment when usb device was attached.

Password Generation
Produces secure passwords that satisfy most rules for secure passwords and can be customized for correct output as needed. See "man pwgen" for details.

clear current line

Print out a man page
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Fetch the requested virtual domains and their hits from log file
The command will read the apache log file and fetch the virtual host requested and the number of requests.

Netstat Connection Check
This command does a tally of concurrent active connections from single IPs and prints out those IPs that have the most active concurrent connections. VERY useful in determining the source of a DoS or DDoS attack.

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