Sometimes you need to get information about the kernel running on your Linux box.
The Linux du command can be used to check disk usage of files and directories on a machine.
You have many files in a directory that you want to combine into one file.
Using regex (regular expressions) and a stream editor like sed can save you tons of time when working with files.
A path is a unique location to a file or a folder in a file system of an OS. A path to a file is a combination of / and alpha-numeric characters.
