Command Line Tool

Command Line Tool#

Syntax#

command [--option 1] [--option 2] <subcommand 1>

Manual of a command#

$ man <command>
# e.g.
$ man ls

Help of a command#

$ <command> --help
# e.g.
$ git --help

Some commands may have subcommands, you can get help for a subcommand as well.

$ <command> <subcommand> --help
# e.g.
$ git add --help

Some useful commands#

which#

Locate a program file in the user’s path. For example,

$ which git

shows that the git command is from /usr/bin/git.

tldr#

tldr simplify the beloved man pages with practical examples. For example,

$ tldr ls

gives

ls

List directory contents.
More information: <https://www.gnu.org/software/coreutils/ls>.

- List files one per line:
    ls -1

- List all files, including hidden files:
    ls -a
...

- Only list directories:
    ls -d */

Note

tldr needs to be installed before using. On macOS, do $ brew install tldr

More information#

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