What does "chmod 755 file" accomplish?

If you use the rm command to accidentally delete a file, how can you get the file back?

Which of the following accurately describes a 'ping?'

What is the maximum length of a file name on Linux?

printenv will:

If a host is called HHH, 'rstat HHH' will:

To search from the current cursor position up to the beginning of the file using VIM, type _ and then the search criteria.

To configure the Kerberos client, which command should you use to import the keytab file?

When configuring a Samba share, how would the engineering group be specified in the smb.conf?

In an extended regular expression, you would use (pattern){3} to match three instances of the pattern. How would you match the same thing with an extended glob?

What is the /etc/hosts file used for?