Which of the following special shell variables is used to process number of the current shell ?

Related Mcqs:

Which of the following commands is used to display your working directory ?

A. dir B. prompt $p$g C. pwd D. path...

Which class network is used for a collection of a small number of networks with a large number of nodes ?

A. Class A B. Class B C. Class C D. All of the above...

Which command is used to set the three permissions for all the three categories of users of a file ?

A. chgrp B. chown C. chmod D. chusr...

Which command is used to remove the read permission of the file ‘note’ from both the group and others ?

A. chmod go+r note B. chmod go+rw note C. chmod go-x note D. chmod go-r note...

What command is used to copy a file ?

A. tar B. cpio C. cp D. copy...