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linux手冊中函數名後小括號中數字的含義

函數 usually sys lan sign mes command tps for

It‘s the section that the man page for the command is assigned to.

These are split as

  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

Original descriptions of each section can be seen in the Unix Programmer‘s Manual (page ii).

linux手冊中函數名後小括號中數字的含義