Commands using alias (216)

  • Run the alias command, then issue ps aux | head and resize your terminal window (putty/console/hyperterm/xterm/etc) then issue the same command and you'll understand. ${LINES:-`tput lines 2>/dev/null||echo -n 12`} Insructs the shell that if LINES is not set or null to use the output from `tput lines` ( ncurses based terminal access ) to get the number of lines in your terminal. But furthermore, in case that doesn't work either, it will default to using the deafault of 12 (-2 = 10). The default for HEAD is to output the first 10 lines, this alias changes the default to output the first x lines instead, where x is the number of lines currently displayed on your terminal - 2. The -2 is there so that the top line displayed is the command you ran that used HEAD, ie the prompt. Depending on whether your PS1 and/or PROMPT_COMMAND output more than 1 line (mine is 3) you will want to increase from -2. So with my prompt being the following, I need -7, or - 5 if I only want to display the commandline at the top. ( http://www.askapache.com/linux-unix/bash-power-prompt.html ) 275MB/748MB [7995:7993 - 0:186] 06:26:49 Thu Apr 08 [askapache@n1-backbone5:/dev/pts/0 +1] ~ In most shells the LINES variable is created automatically at login and updated when the terminal is resized (28 linux, 23/20 others for SIGWINCH) to contain the number of vertical lines that can fit in your terminal window. Because the alias doesn't hard-code the current LINES but relys on the $LINES variable, this is a dynamic alias that will always work on a tty device. Show Sample Output


    26
    alias head='head -n $((${LINES:-`tput lines 2>/dev/null||echo -n 12`} - 2))'
    AskApache · 2010-04-08 22:37:06 7
  • sorts the files by integer megabytes, which should be enough to (interactively) find the space wasters. Now you can dush for the above output, dush -n 3 for only the 3 biggest files and so on. It's always a good idea to have this line in your .profile or .bashrc Show Sample Output


    29
    alias dush="du -sm *|sort -n|tail"
    funky · 2010-03-26 10:18:57 1
  • 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.


    22
    alias busy='my_file=$(find /usr/include -type f | sort -R | head -n 1); my_len=$(wc -l $my_file | awk "{print $1}"); let "r = $RANDOM % $my_len" 2>/dev/null; vim +$r $my_file'
    busybee · 2010-03-09 21:48:41 8
  • ifconfig can't properly display interface's name longer 9 symbols,also it can't show IPs added thru ip command, so 'ip' should be used instead. This alias properly shows long names, bond interfaces and all interface aliases. loopback interface is ignored, since its IP is obvious Show Sample Output


    4
    alias ips='ip a | awk '\''/inet /&&!/ lo/{print $NF,$2}'\'' | column -t'
    zolden · 2010-03-06 20:33:04 0
  • I use this alias in my bashrc. The --vi-keys option makes info use vi-like and less-like key bindings.


    3
    alias info='info --vi-keys'
    eightmillion · 2010-02-16 16:35:17 0
  • Add an alias to your .bashrc that allows you to issue the command xkcd to view (with gwenview) the newest xkcd comic... I know there are thousands of them out there but this one is at least replete with installer and also uses a more concise syntax... plus, gwenview shows you the downloading progress as it downloads the comic and gives you a more full featured viewing experience.


    -5
    echo alias xkcd="gwenview `w3m -dump http://xkcd.com/|grep png | awk '{print $5}'` 2> /dev/null" >> .bashrc
    GinoMan2440 · 2010-01-30 20:38:16 0
  • Note: you'll want to set up pub-key ssh auth. Gives you a quick means of changing volume/tracks/etc for rhythmbox on a remote machine. E.g.: rc --next # Play next track rc --print-playing # Grab the name rc --volume-down rc --help


    9
    alias rc='ssh ${MEDIAPCHOSTNAME} env DISPLAY=:0.0 rhythmbox-client --no-start'
    rhythmx · 2010-01-17 19:43:43 0
  • I use this command (PS1) to show a list bash prompt's special characters. I tested it against A flavor of Red Hat Linux and Mac OS X Show Sample Output


    3
    alias PS1="man bash | sed -n '/ASCII bell/,/end a sequence/p'"
    haivu · 2010-01-15 23:39:28 0
  • Sometimes I just want to run a command quietly but all that keyboard shifting makes my fingers hurt. This little function does the job eg.: if shh type less; then PAGER=less; fi


    8
    silent(){ $@ > /dev/null 2>&1; }; alias shh=silent
    bhepple · 2010-01-04 01:01:03 4
  • For vi(m) users : Add it in your ~/.bashrc Add an "exit" @ the end if you are masochist ;) Show Sample Output


    -1
    alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'
    sputnick · 2009-12-08 12:59:44 0
  • This uses mpg123 to convert the files to wav before burning, but you can use mplayer or mencoder or ffmpeg or lame with the --decode option, or whatever you like.


    3
    alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'
    eightmillion · 2009-11-21 19:57:18 0
  • This is a quick hack to make a gcc caller. Since it runs with gcc instead of tcc, it's a bit more trustworthy as far as the final answers of things go. Show Sample Output


    -3
    alias cstdin='echo "Ctrl-D when done." && gcc -Wall -o ~/.stdin.exe ~/.stdin.c && ~/.stdin.exe'
    taliver · 2009-11-19 16:38:51 1
  • The pstack command prints a stack trace of running processes without needing to attach a debugger, but what about core files? The answer, of course, is to use this command. Usage: gdbbt program corefile


    3
    alias gdbbt="gdb -q -n -ex bt -batch"
    TeacherTiger · 2009-11-10 22:56:59 0

  • 1
    alias ..="cd .." ...="cd ../.." ....="cd ../../.."
    KevinM · 2009-11-04 01:39:29 1
  • The preferred way for scripts (and easier to parse) Show Sample Output


    -3
    alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"
    gibboris · 2009-10-30 15:42:52 0
  • Change to your taste. Much quicker than having to add 'cd' every time. Add it to your .bashrc or .bash_profile.


    1
    alias ..="cd .."; alias ...="cd ../.."; alias ....="cd ../../.."
    Tzunamii · 2009-10-30 01:04:33 2
  • If you receives a lot of compiling errors, type 'clear', then reedit your code and press "SHIFT+PGUP". Show Sample Output


    -3
    alias clear='( for ((i=1;i<$LINES;i++)) ; do echo "" ; done ) ; clear'
    Marcio · 2009-10-27 14:38:31 0
  • # newline to space; the whack before dollar-underbar is required alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) , qq{\n};}' " # newline to comma; the whack before dollar-underbar is required alias nl2,="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{,}, @F) , qq{\n};}' " PROMPT> cat /tmp/foo foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 # 'tr' does not give a newline after it run. Makes a messy commandline. PROMPT> cat /tmp/foo|tr "\n" ' ' foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 $PROMPT> tr "\n" ' ' /tmp/foo # 'tr' does not take arguements PROMPT> tr "\n" ' ' /tmp/foo tr: extra operand `/tmp/foo' Try `tr --help' for more information. # 'nl2space' is a filter and takes arguements, adds a newline after it runs. PROMPT> cat /tmp/foo| nl2space foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 PROMPT> nl2space /tmp/foo foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010


    -1
    alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) , qq{\n};}' "
    relay · 2009-10-01 02:22:23 2
  • Put this in your ~/.bashrc file (or the equivalent) If you use vim a lot, this alias will be immediately obvious. Your brain will thank you.


    9
    alias ':q'='exit'
    tobiasboon · 2009-09-05 17:59:50 2
  • In Bash, when defining an alias, one usually loses the completion related to the function used in that alias (that completion is usually defined in /etc/bash_completion using the complete builtin). It's easy to reuse the work done for that completion in order to have smart completion for our alias. That's what is done by this command line (that's only an example but it may be very easy to reuse). Note 1 : You can use given command line in a loop "for old in apt-get apt-cache" if you want to define aliases like that for many commands. Note 2 : You can put the output of the command directly in your .bashrc file (after the ". /etc/bash_completion") to always have the alias and its completion Show Sample Output


    4
    old='apt-get'; new="su-${old}"; command="sudo ${old}"; alias "${new}=${command}"; $( complete | sed -n "s/${old}$/${new}/p" ); alias ${new}; complete -p ${new}
    Josay · 2009-08-10 00:15:05 0
  • tired of switching to the console to check if some command has finished yet? if notify-send does not work on your box try this one... e.g. rsync -av -e /usr/bin/lsh $HOME slowconnection.bar:/mnt/backup ; z (now fire up X, do something useful, get notified if this stuff has finished).


    4
    alias z='zenity --info --text="You will not believe it, but your command has finished now! :-)" --display :0.0'
    bubo · 2009-08-03 16:38:29 3
  • add (server-start) in .emacs


    -18
    alias vi='emacsclient -n'
    freestyler · 2009-07-29 06:18:40 2
  • making lots of configurations to apache and restarting the server only to find it broken just plain sucks.


    2
    alias restart='apache2ctl configtest && apache2ctl restart'
    digitalmechanic · 2009-07-21 14:13:15 1
  • This is *NOT* about the -i option in grep. I guess everybody already knows that option. This is about the basic rule of life that the simplest things are sometimes the best. ;-) One day when I used "grep -i" for the umpteenth time, I decided to make this alias, and I've used it ever since, probably more often than plain grep. (In fact I also have aliases egrip and fgrip defined accordingly. I also have wrip="grep -wi" but I don't use this one that often.) If you vote this down because it's too trivial and simplistic, that's no problem. I understand that. But still this is really one of my most favourite aliases.


    -3
    alias grip="grep -i"
    inof · 2009-07-21 11:12:15 2
  • This alias finds identical lines in a file (or pipe) and prints a sorted count of them (the name "sucs" descends from the first letters of the commands). The first example shows the number of logins of users; the one who logged in most often comes last. The second example extracts web client IP addresses from a log file, then pipes the result through the "sucs" alias to find out which clients are performing the most accesses. Or pipe the first column of ps(1) output through "sucs" to see how many processes your users are running. Show Sample Output


    0
    alias sucs="sort | uniq -c | sort -n"
    inof · 2009-07-21 10:55:06 0
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