what is the cmd to display the last exit status in UNIX?
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How do I use grep to find a file?
What is command substitution?
Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?
What does 'mkdir' command do in UNIX?
What is pipe command in unix?
Is grep faster than awk?
What is awk used for?
Explain the steps that a shell follows while processing a command.
What does pipe () return?
What does sed command do in unix?
What are the general commands in using unix os for a beginner?
What is the first character of the output in ls l command?
What is the use of egrep command in unix?
Why is it called a shebang?
Explain command to view process running?