Lec. 8 Regular Expressions

When you start to work on your LINUX machine you will quickly accumulate files and so will need some means to manage them before they multiply out of control.
To do this you can create a directory structure. Directories are like divisions that can contain files. By using a directory structure you can keep related files together, but separate from other files. In addition any directory can contain further divisions called subdirectories in case you need to sub-divide your groups of files further.
At the very top of LINUX’s directory structure is the root directory. This contains a number of directories, each of which contain their own subdirectories. When you log into LINUX you are put into your own private directory, called your home directory.To get an idea where you lie in the directory structure give the command
pwd
As was mentioned earlier, when you register you are given an allocation of space called your filestore, in which you can store your files etc. If, however, you allow your files to mount up unchecked, you will eventually exceed your filestore limit, and run the risk of corrupting your files.
In order to keep track of your filestore you can use the command