Linux basic

How to Extract tar file in:

Open terminal And got the present dir where tar/tar.bz2 is present.

and in terminal >>


tar xvjf filename.tar.bz2


$ tar zxf file.tar.gz
$ tar zxf file.tgz

and for more  >> tar --help 


Linux Remove Entire Directory Command

To remove all directories and subdirectories use rm command. For example remove letters and all subdirectories and files inside this directory, type the following command (warning all files including subdirectories will be deleted permanently):

$ rm -rf letters/< Copying and moving directories >

For copying and moving directories you can use the cp and mv commands just like you use them with files. Yeah, I know. If you've already tried to copy a directory with cp, you've probably noticed that cp just complains at you. Probably it says something like cp: omitting directory yadda yadda. You see, the cp command wants you to use the -r option if you want to copy a directory with its contents. The -r means "copy recursively":
$ cp -r dir1 dir2

The above creates a directory named dir2 whose contents will be identical to dir1. However, if dir2 already exists, nothing will be overwritten: the directory dir1 will be copied into thedir2 directory under the name dir2/dir1.

When renaming directories, you use the mv command exactly the same way as with files:
$ mv dir1 dir2

When dealing with directories, mv works a bit like cp does. If dir2 doesn't exist, the above will rename dir1 to dir2, but if dir2 exists, the directory dir1 will be moved into the dir2directory under the name dir2/dir1.