The document provides syntax and descriptions for various Linux commands including bc, cal, cat, cd, cp, date, echo, grep, id, last, lastlog, ls, man, mkdir, mv, pwd, rm, rmdir, sort, shutdown, who, whois, more, less, clear, cmp, wc, whoami, head, and tail. It explains what each command is used for and provides the basic syntax.
20. cp command copy files from one location to another. If the destination is an existing file, then the file is overwritten; if the destination is an existing directory, the file is copied into the directory (the directory is not overwritten).
62. cmp file1 file2 - Compares two files, reporting all discrepancies. Similar to the diff command, though the output format differs.
63. wc filename --- tells you how many lines, words, and characters there are in a file
64. whoami --- returns your username. Sounds useless, but isn't. You may need to find out who it is who forgot to log out somewhere, and make sure *you* have logged out.