calibre [options] [path_to_ebook]

Launch the main calibre Graphical User Interface and optionally add the e-book at path_to_ebook to the database.

Whenever you pass arguments to calibre that have spaces in them, enclose the arguments in quotation marks. For example: “/some path/with spaces”



Detach from the controlling terminal, if any (Linux only)

--help, -h

show this help message and exit


Ignore custom plugins, useful if you installed a plugin that is preventing calibre from starting


Do not check for updates

--shutdown-running-calibre, -s

Cause a running calibre instance, if any, to be shutdown. Note that if there are running jobs, they will be silently aborted, so use with care.


Start minimized to system tray.

--verbose, -v

Ignored, do not use. Present only for legacy reasons


show program's version number and exit


Use the library located at the specified path.