See: "man pwgen" for full details.

Some Linux distros may not have pwgen included in the base distribution

so you maye have to install it (eg in Mandriva Linux: "urpmi pwgen").

To install a theme use:

You can get the .xpi or .jar file from the versions history on the add-on/theme page.

NOTE: may not work in your system (Debian-based is an example).

Not so useful. Just a cool feature.

The download content part.

NOTE: the '-c' seems to not work very well and the download stuck at 99% sometimes. Just finish wget with no problem. Also, the download may restart after complete. You can also cancel. I don't know if it is a wget or Rapidshare glitch since I don't have problems with Megaupload, for example.

UPDATE: as pointed by roebek the restart glitch can be solved by the "-t 1" option. Thanks a lot.

In order to do that, first you need to save a cookie file with your account info. These commands do it (maybe you need to create the '.cookies' dir before). Also, you need to check the "Direct downloads" option on the Premium Zone >> Settings tab.

You need to do this once (as long you maintain the file or your Rapidshare Premium account).

A great password generation tool. http://www.adel.nursat.kz/apg/

Within vi allow to empty a text file in one shot

The vi key sequence !}command will send the file contents from the cursor

to the next blank line as STDOUT to the command specified

and replace that sequence of file lines with the output of the command.

For example: sorting a block of data - !}sort

The sequence !{command will do the same but "upwards" (from the current position towards the start of the file.

head by default displays first ten lines of its output. Use 'head -nXX' to display the XX largest files

apart from not being generalisable to all shells, `Y <<< X` seems nicer to me than `echo X | Y`, e.g.

it reads easier, you type less, and it also looks cool

this exits bash without saving the history. unlike explicitly disabling the history in some way, this works anywhere, and it works if you decide *after* issuing the command you don't want logged, that you don't want it logged

... $$ ( or ${$} ) is the pid of the current bash instance

this also works perfectly in shells that don't have $$ if you do something like

Some commands (such as netcat) have a port option but how can you know which ports are unused?

A quick way to list services running

Python comments begin with a #. Modify to suit other languages.

Other uses: Instead of m0 use m$ for end of file or d for deleting all comments.

This command will replace all instances of 'foo' with 'bar' in all files in the current working directory and any sub-directories.

This command will replace all instances of 'foo' with 'bar' in all files in the current working directory.

This turns your iptables packet filter to a "Allow any from any to any" filter, so you can rule out any filtering issues when you have a problem to enable a connection from or to your host.

To re-enable it, run /etc/init.d/iptables restart

You can watch channels of your freebox, everywhere. With " vlc http://your-ip:12345 " on the client and ncurses vlc interface on the host. et voila

Change files case, without modify directories, recursively.

... fucking vfat

Extensible to other ugly extensions like *.JPG, *.Jpg etc..

Leave out the last pipe to sh to perform a dry run.

To resize photos without changing exif datas, pretty cool for gps tagging.

(Require ImageMagick)