Commands tagged help (6)

  • Start a HTTP server which serves Python docs

    I use this command to start a local Python document server over HTTP port 8888.


    12
    pydoc -p 8888 & gnome-open http://localhost:8888
    haivu · 2010-02-28 07:01:43 5
  • 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 8
  • RTFM function

    Same as the other rtfm's, but using the more correct xdg-open instead of $BROWSER. I can't find a way to open info only if the term exists, so it stays out of my version.


    1
    rtfm() { help $@ || man $@ || xdg-open "http://www.google.com/search?q=$@"; }
    KlfJoat · 2014-04-25 04:17:03 70
  • Search gdb help pages

    Most of you are probably familiar with the "apropos" command for searching man pages. However, did you know there's a similar command inside of gdb? If, for example, you wanted to know all gdb commands that related to threads, you could type "apropos thread". Type "help some_command" to receive more information about a command. Type "help" by itself to see a list of help topics.


    0
    gdb command: apropos <keyword>
    kFiddle · 2009-05-01 23:19:35 2
  • find an installed program for a task


    0
    apropos -a keywords
    lolssl · 2015-09-22 16:42:57 6
  • Display helpful information about builtin commands.

    don't `man bash` Show Sample Output


    -4
    help builtin
    kev · 2011-12-25 04:52:49 4

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Encode a file to MPEG4 format
Encode video.avi into newvideo.avi using the libav codec to produce an MPEG4 file with a bitrate of 800

Netcat & Tar
Create a tarball on the client and send it across the network with netcat on port 1234 where its extracted on the server in the current directory.

Install pip with Proxy
Installs pip packages defining a proxy

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Stop and continue processing on a terminal
This will send the ASCII sequence for DC3 to the currently running tty which results in SIGSTOP (19). You can continue with ASCII sequence for DC1 by pressing CTRL+q which results in SIGCONT (18).

Emergency Alien Invasion Warning
When aliens invade Earth, be first to warn your neighbours by placing your computer screen at a window and executing this potentially Earth-saving command. Ctrl C when aliens are defeated.

convert single digit to double digits
each number in a file name gets expanded to the number of digets provided as arg_1 of the arguments in rjust_file_nums. Put the funciton in the .bashrc file. Be sure to $ source ~/.bashrc so that the function will be accessible from bash.

Generate pretty secure random passwords
These are my favourite switches on pwgen: -B Don't include ambiguous characters in the password -n Include at least one number in the password -y Include at least one special symbol in the password -c Include at least one capital letter in the password It just works! Add a number to set password length, add another to set how many password to output. Example: pwgen -Bnyc 12 20 this will output 20 password of 12 chars length.

attach to bash shell in the last container you started

Bind a key with a command
the -x option is for binding to a shell command

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