Command-line Options (GNU Grep 3.7)
2.1 Command-line Options
grep comes with a rich set of options: some from POSIX and some being GNU extensions. Long option names are always a GNU extension, even for options that are from POSIX specifications. Options that are specified by POSIX, under their short names, are explicitly marked as such to facilitate POSIX-portable programming. A few option names are provided for compatibility with older or more exotic implementations.
Several additional options control which variant of the
grep matching engine is used. See grep Programs.
- Generic Program Information
- Matching Control
- General Output Control
- Output Line Prefix Control
- Context Line Control
- File and Directory Selection
- Other Options