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https://media.goboard.io/cs183
Fish vs. Fishing
n Manpage
q $ man ls
q $ man 2 mkdir
q $ man man
q $ man -k mkdir
n Manpage sections (LAH Table 1.2 @ page 12)
q 1 User-level cmds and apps
n /bin/mkdir
q 2 System calls
n int mkdir(const char *, …);
q 3 Library calls
n int printf(const char *, …);
q 4 Device drivers and network protocols
n /dev/tty
q 5 Standard file formats
n /etc/hosts
q 6 Games and demos
n /usr/games/fortune
q 7 Misc. files and docs
n man 7 locale
q 8 System admin. Cmds
n /sbin/reboot
n $ manpath
n $ env | grep MANPATH
n /etc/man.config