If you're working in large network environment and you have some ip conflicts, you can use arping command under Linux. This command sends arp requests on the Ethernet layer and is a part of iputils package (so arping is available on ...
In Cisco CLI, the question mark allow you to obtain a list of command/options.
Router(config)# enable secret ?
0 Specifies an UNENCRYPTED password will follow
5 Specifies an ENCRYPTED secret will follow
LINE The UNENCRYPTED (cleartext) 'enable' secret
level Set exec level password ...According to the official website, Qalculate is : a multi-purpose desktop calculator for GNU/Linux. It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (KDE or GTK+).
Qalculate is ...