This will print the name of every installed package on a Debian system.

This uses wget instead of curl

You can find a command's history event number via the `history` command. You can also put the history event number in your prompt: \! for bash, or %h for zsh. Finally, I would like to point out that by "number", I mean POSITIVE INTEGER. Not, say, a letter, such as 'm'. Examples: !1 or !975 Show Sample Output

Check the API. You shouldn't need sed. The print-newline at the end is to prevent zsh from inserting a % after the end-of-output. Also works with http://v.gd Show Sample Output

If you've ever tried "grep -P" you know how terrible it is. Even the man page describes it as "highly experimental". This function will let you 'grep' pipes and files using Perl syntax for regular expressions. The first argument is the pattern, e.g. '/foo/'. The second argument is a filename (optional). Show Sample Output

A space-padded version: perl -m'AptPkg::Cache' -e '$c=AptPkg::Cache->new; for (keys %$c){ push @a, $_ if $c->{$_}->{'CurrentState'} eq 'Installed';} print "$_ " for sort @a;'

This is for zsh with extended globbing.

You can also specify width and height of the resized image (in pixels), as an alternative to using a percentage.

This works fine too.

This will show you any links that a command follows (unlike 'file -L'), as well as the ultimate binary or script. Put the name of the command at the very end; this will be passed to perl as the first argument. For obvious reasons, this doesn't work with aliases or functions. Show Sample Output

Really, you deserve whatever happens if you have a whitespace character in a file name, but this has a small safety net. The truly paranoid will use '-i'.

This will show the amount of physical RAM that is left unused by the system. Show Sample Output

Requires Net::Twitter. Just replace the double quoted strings with the appropriate info.

A function that allows you to perform a case-insensitive search in the current directory, and directories in the current directory (but no further), for files containing the first argument anywhere in their names.

You can specify a range via '-'. Show Sample Output

'n' is a non-negative integer. Using 0 will expand to the name of the previous command. Show Sample Output

A really useful pair of du options. Show Sample Output

A little aptitude magic. Note: this will remove images AND headers. If you just want to remove images: aptitude remove ?and(~i~nlinux-im ?not(~n`uname -r`)) I used this in zsh without any problems. I'm not sure how other shells will interpret some of the special characters used in the aptitude search terms. Use -s to simulate.

Translate the X selection from German to English. The tw program is available from Savannah: http://mirror.its.uidaho.edu/pub/savannah/twandgtw/ I'm posting this because the base Debian system also does not include curl.

This prints "Charging" or "Discharging". Obviously, this will indicate the status of the AC adapter. The awk part could be from 1-6. I removed the comma because it is useless when only looking at one element of the output array. See acpi(1) for more info.