fwconsole: add page (#15350)

Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/linux/fwconsole.md

@@ -0,0 +1,32 @@
+# fwconsole
+
+> Manage and configure your FreePBX system (PBX server).
+> More information: <https://sangomakb.atlassian.net/wiki/spaces/PG/pages/41779247/fwconsole+commands+13>.
+
+- Reload FreePBX configurations:
+
+`fwconsole reload`
+
+- Start Asterisk and other commands needed by FreePBX:
+
+`fwconsole start`
+
+- Stop Asterisk and other commands needed by FreePBX:
+
+`fwconsole stop`
+
+- View and update settings:
+
+`fwconsole setting {{keyword}} {{new_value}}`
+
+- List available backups:
+
+`fwconsole backup --list`
+
+- List available FreePBX commands:
+
+`fwconsole list`
+
+- Change ownership of all files and directories that FreePBX needs to be owned by the apache user:
+
+`fwconsole chown`