commandlinefu.com is the place to record those command-line gems that you return to again and again.
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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
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If you edit your .profile you need to refresh it for changes to take place. Simple way to refresh is logout and login. This command is the quickest way to do it.
If you're deleting some variables, they would not get nulled with this command but just removed.
connects to all the screen instances running.
tell you how many Non free software is on your machine, which package it is and which restriction on freedom it has . require vrms package , vrms mean virtual Richard M. Stallman :)
Require boxes and / or cowsay packages.
After input boxes -d dog , type your text and then press ctrl + d . Same goes for cowsay .
need toilet package , same goes for figlet
showfigfonts | less : give the list of font available for options
sudo apt-get install moon-buggy
An ascii 2D game where you control a mooncar and try to avoid moonhole by jumping (press space )
sudo apt-get install bb
A demoscene intro in ascii art with tracker song
When Ldapsearch queries an Active directory server, all the dates are shown using a timestamp of 18 digits. This perl regexp decodes them in a more human friendly notation. 11644473600 corresponds to some microsoft epoch.
The British Government entering in the Gregorian era.
64 elements max on 16 rows, 4 cols.
GNU Barcode will adapt automagically the width and the eight of your elements to fill the page.
Standard output format is PostScript.
When there is a bad block in the middle of your file, you can see its begninning with `cat' and its end with `tac'. But both commands terminates with an error. So this sequence rebuilds a new file without badblock.
The command is useful when, e.g., booting an existing system with a rescue or installation CD where you need to chroot into the hard-disk and be able to do stuff which accesses kernel info (e.g. when installing Ubuntu desktop with LVM2 you need to mount and chroot the hard disk from a shell window in order to install packages and run initramfs inside chroot).
The command assumes that /mnt/xxx is where the chroot'ed environment's root file system on the hard disk is mounted.
Reconfigures time zone in Ubuntu, which I cannot figure out how to do through the GUI. Worked like a charm to set my time zone to CEST from EDT.
Requires the "wajig" package to be installed.
This is the fastest method to search the Debian package database.
Requires the dlocate package. The dlocate db updates periodically, but you may force an update with
Replace FILE with a filename (or - for stdin).
sudo apt-get install sl
This command puts all the flags of the USE variable actually used by the packages you emerged to the file "use", and those which are unused but available to the file "notuse"
Like symlinked directories, you can mount a directory at a different location. For example mounting a directory from one location in to the http root without having to make your program follow symlinks or change permissions when reading.
can display the commands and their output to another user who is connected to another terminal, by example pts/3