Q101

Which environment variable is used by an X11 client to determine the X Server to connect to? (Specify only the variable name without any preceding commands or values.) 

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What option to useradd creates a new user's home directory and provisions it with a set of standard files? (Specify only the option name without any values or parameters.) 

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What command enables a network interface according to distribution-specific configuration, such as /etc/network/interfaces or /etc/sysconfig/ network-scripts/ifcfg-eth0? (Specify only the command without any path or parameters.) 

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Which parameter is missing in the command 
ip link set ____ dev eth0 
to activate the previously inactive network interface eth0? (Specify the parameter only without any command, path or additional options.) 

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Which parameter of the ssh command specifies the location of the private key used for login attempts? (Specify only the option name without any values or parameters.) 

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Which directory holds configuration files for xinetd services? (Specify the full path to the directory.) 

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What command is used to add OpenSSH private keys to a running ssh-agent instance? (Specify the command name only without any path.) 

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Which command is used to sync the hardware clock to the system clock? (Specify only the command without any path or parameters.) 

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  Which file is processed by newaliases? (Specify the full name of the file, including path.) 

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When using X11 forwarding in SSH, what environment variable is automatically set in the remote shell in order to help applications to connect to the correct X11 server? (Specify only the environment variable without any additional commands or values.)