Which of the following commands can deconfigure a network interface?

Which command manipulates the TTL (Time to Live) field in the IP protocol in order to get ICMP
responses from gateways along the path to a host?

Which command is used to set restrictions on the size of a core file that is created for a user when
a program crashes?

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The xinetd service will be used instead of inetd. In order to create a similar configuration as inetd,
what main file must be created or edited for xinetd? (Please specify the full path)

When generating new authentication keys with SSH for a user, where should the private key be
kept?

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By default, the contents of which directory will be copied to a new user’s home directory when the
account is created by passing the -m option to the useradd command? (Please provide the full
path)

Why is the xhost program considered dangerous to use?

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What is the name of the simple graphical login manager that comes with a vanilla X11 installation?
(Provide only the name of the program without any path information)

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What command will display the group names and GIDs to which a user belongs? (Provide only the
command name with or without path information)

What is the conventional purpose of Linux UIDs that are lower than 100?