Linux命令学习神器：tldr命令

tldr command [options]

Options：

Options:  -V, --version            output the version number  -l, --List               List all commands for the chosen platform in the cache  -a, --List-all           List all commands in the cache  -1, --single-column      List single command per line (use with options -l or -a)  -r, --random             Show a random command  -e, --random-example     Show a random example  -f, --render [file]      Render a specific markdown [file]  -m, --markdown           Output in markdown format  -o, --os [type]          OverrIDe the operating system [linux, osx, sunos]  --linux                  OverrIDe the operating system with linux  --osx                    OverrIDe the operating system with OSX  --sunos                  OverrIDe the operating system with SunOS  -t, --theme [theme]      color theme (simple, base16, ocean)  -s, --search [keywords]  Search pages using keywords  -u, --update             Update the local cache  -c, --clear-cache        Clear the local cache  -h, --help               output usage information

[rohn@WhiteQueen ~]$ tldr grep  grep  Matches patterns in input text.  Supports simple patterns and regular Expressions.  - Search for a pattern within a file:    grep search_pattern path/to/file  - Search for an exact string:    grep -F exact_string path/to/file  - Search for a pattern recursively in the current directory, ignoring non-text files:    grep -RI search_pattern .  - Use extended regular Expressions (supporting ?, +, {}, () and |), in case-insensitive mode:    grep -Ei search_pattern path/to/file  - Print 3 lines of [C]ontext around, [B]efore, or [A]fter each match:    grep -C|B|A 3 search_pattern path/to/file  - Print file name with the corresponding line number for each match:    grep -Hn search_pattern path/to/file  - Use the standard input instead of a file:    cat path/to/file | grep search_pattern  - Invert match for excluding specific strings:    grep -v search_pattern