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• Can you look at "." using the cat command?
• Display help for the cat program, using the --help option. Use the option for numbering of output lines to count how many users are listed in the file /etc/passwd.
2.5.5. Getting help
• Read man intro
• Read man ls
• Read info passwd
• Enter the apropos pwd command.
• Try man or info on cd.
-> How would you find out more about cd?
• Read ls --help and try it out.
