i3(1) - an improved dynamic, tiling window manager
-a
    Disables autostart.
-c
    Specifies an alternate configuration file path.
-C
    Check the configuration file for validity and exit.
-d
    Specifies the debug loglevel. To see the most output, use -d all.
-v
    Display version number (and date of the last commit).
-V
    Be verbose.