Who developed Linux?

Which of the following is an incorrect command?

What is the correct format to open the file /etc/test into the vi editor?

Which of the following vi commands will delete the current line?

How can you locate the file named passwd?

The user's current path is /root/Desktop/abc. If he runs $ cd ../../../ what will be the user's current working directory?

To power down the system, you use:

How would you find out the dependencies of RPM package?

Using scp to copy a file 'test_file' from your machine to the remote machine 'test_machine' to the /tmp directory, using the account 'test_user' on the remote machine, you do:

The following entry appears in the /etc/crontab as follows: 30 4 * * 1 /bin/sh /home/Tom/rmcore 2>&1 /dev/null

What is pNFS means?