The option -G of usermod command will remove user from other groups not listed, i.e.: $USER will belong only to group 'docker' after following the documentation as is.
>From usermod(8) manual page: If the user is currently a member of a group which is not listed, the user will be removed from the group. This behaviour can be changed via the -a option, which appends the user to the current supplementary group list. This patch improves the situation by adding the -a option to the usermod command, which will just append user to the supplementary group list. Cc: qemu-triv...@nongnu.org Signed-off-by: Murilo Opsfelder Araujo <muri...@linux.ibm.com> --- docs/devel/testing.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst index 18e2c0868a..135743a2bf 100644 --- a/docs/devel/testing.rst +++ b/docs/devel/testing.rst @@ -301,7 +301,7 @@ An alternative method to set up permissions is by adding the current user to .. code:: $ sudo groupadd docker - $ sudo usermod $USER -G docker + $ sudo usermod $USER -a -G docker $ sudo chown :docker /var/run/docker.sock Note that any one of above configurations makes it possible for the user to -- 2.20.1