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Creating a hard link to an ordinary file returns an error. What could be the reason for this?
Which of the following are valid stream redirection operators within Bash? (Choose THREE correct answers.)
How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)
Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?
Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)
What is the lowest numbered unprivileged TCP port? (Specify the number in digits only.)
Which command is used in a Linux environment to create a new directory? (Specify ONLY the command without any path or parameters.)
Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?