$ cd .. moves ___ level up in the file hierarchy.

Which option is used for the OR operation in the test command?

Which command is used to print the current working directory?

What command is used for searching for a pattern in one or more file(s)?

The ___ option in case statement matches any option not matched by the previous options.

Which of the following is not a part of the basic regular expression (BRE) character subset?

To run the script, we should make it executable first by using _____

To get the process ID (PID) of your current shell, which command should be used?

What is the use of df command in linux.

Which command is used to display the date in the format dd/mm/yyyy?