What is wildcard
Use of wildcards
Examples of wildcard
Command to delete empty directory
grep command use
grep invert search
How to check character word and line of file
Use of find command
How to search only files using find
How to search file type directory using find
How to find all files with suid permission
Set permission using find command
How to search files by size.
What is command substitute in shell
What is the use single and double quote
Use of tilde
What is the use of command separator.
What is the use of pipe
Use of sort command
How to change the format of date output