You wish to notify all users that you have to take down a service on which they rely. What command
will allow you to send a message to all currently logged on users? Enter only the command, not the
path.

Connecting to a remote host on the same LAN using ssh public-key authentication works but
forwarding X11 doesn’t. The remote host allows access to both services. Which of the following
can be the reason for that behavior?

When configuring a new kernel, what file under /usr/src/linux/ contains the configuration?

An iptables firewall was configured to use the target MASQUERADE to share a dedicated wireless
connection to the Internet with a few hosts on the local network.
The Internet connection becomes very unstable in rainy days and users complain their
connections drop when downloading e-mail or large files, while web browsing seems to be working
fine.
Which change to your iptables rules could alleviate the problem?

What is the command that will extract information, such as module parameters, from the Linux
Kernel modules and print this information to the command line? (Please specify only the command
with no path information)

Which command line create an SSH tunnel for POP and SMTP protocols?

When compiling kernel modules, which make target will remove most generated files but keep the
config file and enough build support to build external modules? (Please enter only the make target
and no other words)