fs_cli: add page (#20453)

Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>

pages/linux/fs_cli.md

@@ -0,0 +1,36 @@
+# fs_cli
+
+> Connect to and control a running FreeSWITCH server using the FreeSWITCH Command Line Interface (ESL client).
+> More information: <https://developer.signalwire.com/freeswitch/FreeSWITCH-Explained/Client-and-Developer-Interfaces/1048948/>.
+
+- Connect to the local FreeSWITCH instance with an interactive session:
+
+`fs_cli`
+
+- Connect to a remote FreeSWITCH server:
+
+`fs_cli {{[-H|--host]}} {{host}} {{[-P|--port]}} {{port}} {{[-p|--password]}} {{password}}`
+
+- Execute a single FreeSWITCH command and exit:
+
+`fs_cli {{[-x|--execute]}} "{{command}}"`
+
+- Show FreeSWITCH system status:
+
+`fs_cli {{[-x|--execute]}} "status"`
+
+- Reload FreeSWITCH XML configuration:
+
+`fs_cli {{[-x|--execute]}} "reloadxml"`
+
+- Check if a module is loaded:
+
+`fs_cli {{[-x|--execute]}} "module_exists {{module_name}}"`
+
+- Show active calls:
+
+`fs_cli {{[-x|--execute]}} "show calls"`
+
+- Retry connection on failure:
+
+`fs_cli {{[-r|--retry]}}`