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+.. _cli:
+
+Command Line Interface
+======================
+
+There are two command-line interfaces provided by **lnav**, one for viewing
+files and one for managing **lnav**'s configuration.  The file viewing mode is
+the default and is all that most people will need.  The management mode can
+be useful for those that are developing log file formats and is activated by
+passing the :option:`-m` option as the first argument.
+
+File Viewing Mode
+-----------------
+
+The following options can be used when starting **lnav**.  There are not
+many flags because the majority of the functionality is accessed using
+the :option:`-c` option to execute :ref:`commands<commands>` or
+:ref:`SQL queries<sql-ext>`.
+
+Options
+^^^^^^^
+
+.. option:: -h
+
+   Print these command-line options and exit.
+
+.. option:: -H
+
+   Start lnav and switch to the help view.
+
+.. option:: -C
+
+   Check the given files against the configuration, report any errors, and
+   exit.  This option can be helpful for validating that a log format is
+   well-formed.
+
+.. option:: -c <command>
+
+   Execute the given lnav command, SQL query, or lnav script.  The
+   argument must be prefixed with the character used to enter the prompt
+   to distinguish between the different types (i.e. ':', ';', '|').
+   This option can be given multiple times.
+
+.. option:: -f <path>
+
+   Execute the given command file.  This option can be given multiple times.
+
+.. option:: -I <path>
+
+   Add a configuration directory.
+
+.. option:: -i
+
+   Install the format files in the :file:`.lnav/formats/` directory.
+   Individual files will be installed in the :file:`installed`
+   directory and git repositories will be cloned with a directory
+   name based on their repository URI.
+
+.. option:: -u
+
+   Update formats installed from git repositories.
+
+.. option:: -d <path>
+
+   Write debug messages to the given file.
+
+.. option:: -n
+
+   Run without the curses UI (headless mode).
+
+.. option:: -N
+
+   Do not open the default syslog file if no files are given.
+
+.. option:: -r
+
+   Recursively load files from the given base directories.
+
+.. option:: -t
+
+   Prepend timestamps to the lines of data being read in on the standard input.
+
+.. option:: -w <path>
+
+   Write the contents of the standard input to this file.
+
+.. option:: -V
+
+   Print the version of lnav.
+
+.. option:: -q
+
+   Do not print the log messages after executing all of the commands.
+
+
+Management Mode (v0.11.0+)
+--------------------------
+
+The management CLI mode provides functionality for query **lnav**'s log
+format definitions.
+
+Options
+^^^^^^^
+
+.. option:: -m
+
+   Switch to management mode.  This must be the first option passed on the
+   command-line.
+
+Subcommands
+^^^^^^^^^^^
+
+.. option:: regex101 import <regex101-url> <format-name> [<regex-name>]
+
+   Convert a regex101.com entry into a skeleton log format file.
+
+.. option:: format <format-name> regex <regex-name> push
+
+   Push a log format regular expression to regex101.com .
+
+.. option:: format <format-name> regex <regex-name> pull
+
+   Pull changes to a regex that was previously pushed to regex101.com .
+
+Environment Variables
+---------------------
+
+.. envvar:: XDG_CONFIG_HOME
+
+   If this variable is set, lnav will use this directory to store its
+   configuration in a sub-directory named :file:`lnav`.
+
+.. envvar:: HOME
+
+   If :envvar:`XDG_CONFIG_HOME` is not set, lnav will use this directory
+   to store its configuration in a sub-directory named :file:`.lnav`.
+
+.. envvar:: APPDATA
+
+   On Windows, lnav will use this directory instead of HOME
+   to store its configuration in a sub-directory named :file:`.lnav`.
+
+.. envvar:: TZ
+
+   The timezone setting is used in some log formats to convert UTC timestamps
+   to the local timezone.
+
+
+Examples
+--------
+
+  To load and follow the system syslog file:
+
+  .. prompt:: bash
+
+    lnav
+
+  To load all of the files in :file:`/var/log`:
+
+  .. prompt:: bash
+
+    lnav /var/log
+
+  To watch the output of make with timestamps prepended:
+
+  .. prompt:: bash
+
+    make 2>&1 | lnav -t