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-rw-r--r--login-utils/runuser.13
1 files changed, 2 insertions, 1 deletions
diff --git a/login-utils/runuser.1 b/login-utils/runuser.1
index 0672cd66d..2f88f8157 100644
--- a/login-utils/runuser.1
+++ b/login-utils/runuser.1
@@ -67,7 +67,8 @@ shell.
The primary group to be used. This option is allowed for the root user only.
.TP
.BR \-G , " \-\-supp\-group" = \fIgroup
-A supplemental group to be used. This option is allowed for the root user only.
+Specify a supplemental group. This option is available to the root user only. The first specified
+supplementary group is also used as a primary group if the option \fB\-\-group\fR is unspecified.
.TP
.BR \- , " \-l" , " \-\-login"
Start the shell as a login shell with an environment similar to a real