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output the contents of a file removing any empty lines including lines which contain only spaces or tabs.

Conficker Detection with NMAP

Change the case of a single word in vim
In edit mode, toggle the case of a single word under the cursor in vim.

show hidden chars in vi

Send a local file via email
This just reads in a local file and sends it via email. Works with text or binary. *Requires* local mail server.

Fetch the current human population of Earth

find files in a date range
Find files in a specific date range - in this case, the first half of last year. -newermt = modification time of the file is more recent than this date GNU find allows any date specfication that GNU date would accept, e.g. $ find . -type f -newermt "3 years ago" ! -newermt "2 years ago" or $ find . -type f -newermt "last monday"

To print a specific line from a file
You can get one specific line during any procedure. Very interesting to be used when you know what line you want.

password recovery on debian
Appended to grub boot parameters ... gives shell ... password recovery

Delete all files in a folder that don't match a certain file extension
Deletes all files in a folder that are NOT *.foo, *.bar or *.baz files. Edit the pattern inside the brackets as you like.


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