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.
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.