What command with all options and/or parameter will send the signal USR1 to any executing process of program apache2?
USB fax/modems that conform to this subclass of the Communication Device Class (CDC) vendor neutral standard are Linux compatible (answer is a 3 letter acronym)
Which environment variable you have to setup to use shared libraries that are not in the standard search path?
The dpkg-______ command will ask configuration questions for a specified package, just as if the package were being installed for the first time.