Some basic File Manipulation commands
 

HI,

1. What is the command-lines for creating and deleting sub-directories.

2. what is the command-line for creating a zero-length file

3. what is command for saving a file under VIM

1) if you mean what i think you mean then mkdir -p and rm -r

2) touch

3) :w to write and quit :wq or ZZ

You can also create a zero-length file using ">". For example:

lyle@bowman:~/empty$ > testfile
lyle@bowman:~/empty$ ls -l testfile
-rw------- 1 lyle users 0 Sep 24 20:35 testfile
lyle@bowman:~/empty$

Lyle