The command du -h ~

Which tool is similar to find except that it uses an index to search?

The command 'free' reports on:

LVM is...

Consider using the command 'cd /a/b/c', then executing 'cd ..'. What does this last command do?

To access the value of an environment variable, we _____.

As root, you set execute permissions for user, group, and other on a directory. Now users can do what?

How does TCP Wrappers differ from a firewall?

When would this system cron job run its task? 0 22 * * 1-5

To elevate privileges using the sudo command, a user must _.

What would happen if you have a script file named script that takes a long time to complete, and you type nohup ./script & in the command line?