what does crypt(3) and whatnot mean
I'm talking about, e.g. in the git Manual pages, on the
See gittutorial(7) to get started,
Add file contents to the index.
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There are different sections of the man pages:
1 General commands 2 System calls 3 C library functions 4 Special files (usually devices, those found in /dev) and drivers 5 File formats and conventions 6 Games and screensavers 7 Miscellanea 8 System administration commands and daemons
git(1) would be explaining the usage of the command, gittutorial(7) would be miscellaneous information.