See the section "Mounting File Systems" later in this chapter for instructions on how to mount a file system. ■
To find commands intended primarily for the system administrator, check out the section 8 manual pages (usually in /usr/share/man/man8). They contain descriptions and options for most Linux administrative commands.
Some third-party applications add administrative commands to directories that are not in your PATH. For example, an application may put commands in / usr/local/bin, / opt/bin, or / usr/local/sbin. Some Linux distributions automatically add those directories to your PATH, usually before your standard bin and sbin directories. In that way, commands installed to those directories are not only accessible, but can also override commands of the same name in other directories.
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