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Recover deleted Binary files
The above command assumes the lost data is on /dev/sda and you previously issued the following command to mount _another_ disk or partition (/dev/sdb1) on /recovery $sudo mount /dev/sdb1 /recovery If you don't do this, the data could be overwrited! foremost is a very powerful carving tool. By default foremost recovers all known file types. If you want to reduce the amount of files that are recovered you can specify the file type you are looking for. Read the man page to know the available file types. i.e to recover JPEG pictures append to foremost the switch -tjpg

!* Tells that you want all of the *arguments* from the previous command to be repeated in the current command
Example: touch file{1,2,3}; chmod 777 !*

lists files and folders in a folder
lists files and folders in a folder with summary.

list block devices
Shows all block devices in a tree with descruptions of what they are.

Graphical tree of sub-directories
Prints a graphical directory tree from your current directory

[vim] Clear a file in three characters (plus enter)
% selects every line in the file. 'd' deletes what's selected. It's a pretty simple combination.

In place line numbering
Add permanent line numbers to a file without creating a temp file. The rm command deletes file10 while the nl command works on the open file descriptor of file10 which it outputs into a new file again named file10. The new file10 will now be numbered in the same directory with the same file name and content as before, but it will in fact be a new file, using (ls -i) to show its inode number will prove this.

Recursively Find Images, Convert to JPEGS and Delete
Simple command to convert a large number of images into jpeg-format. Will delete originals after conversion.

Process command output line by line in a while loop
This snippet allows to process the output of any bash command line by line.

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.


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