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Install a new kernel in Manjaro linux
00 is the number of the linux kernel e.g. linux39

Submit command & rewrite orginal command
Similar to entering a command, but will not erase the command from the command line. Basically a shortcut from entering command, then pushing the up arrow key.

Convert the contents of a directory listing into a colon-separated environment variable
Useful for making a CLASSPATH out of a list of JAR files, for example. Also: export CLASSPATH=.:$(find ./lib -name '*.jar' -printf '%p:')

Show a prettified list of nearby wireless APs

Create a file of a given size in linux
if the fs support sparse file,using truncate can create sparse file. http://en.wikipedia.org/wiki/Sparse_file

Get full from half remembered commands
Show all commands having the part known by you. Eg: $apropos pdf | less

Console clock

Find top 10 largest files in /var directory (subdirectories and hidden files included )
Same as above, but modified to show human readable output

auto terminal title change
above line in .bash_profile will give you window title in putty or terminal client when you login to your remote server

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


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