Commands by moderncrew (0)

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Create and access directory at the same time
Create and access directory (edited)

Calculate days on which Friday the 13th occurs
Simply change the years listed in the first seq, and it will print out all the months in that span of years that have Friday the 13ths in them.

Find the package that installed a command

Do a search-and-replace in a file after making a backup
sed already has an option for editing files in place and making backup copies of the old file. -i will edit a file in place and if you give it an argument, it will make a backup file using that string as an extension.

Download last file from index of

Update grub menu.lst
Remove all commented lines Remove all blank lines Show the menu Up the delay so you have enough time to select a kernel Remove the quiet so you can watch the entire boot Add a rootdelay for san attached storage booting

Hear the mice moving
Beeps on mouse's every move. Bear in mind that, at least on Ubuntu, /dev/input/mice can be read only by root.

Purge configuration files of removed packages on debian based systems
also search with aptitude search '~c'

Duplicate installed packages from one machine to the other (RPM-based systems)

Generate Random Passwords
If you want a password length longer than 6, changing the -c6 to read -c8 will give you 8 random characters instead of 6. To end up with a line-feed, use this with echo: # echo `< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c6` Modern systems need higher strenght, so add some special characters: # < /dev/urandom tr -dc '[email protected]#$%qwertQWERTasdfgASDFGzxcvbZXCVB' | head -c8


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