Group member cannot write even with write permission The logged in user is a member of a group that has a write permission on a folder. But when this user is trying to write something, "permission is denied". The log below summarizes the question: subv:/www/tracer/ whoami frank subv:/www/tracer/ subv:/www/tracer/ ls -ltr total 4 drwxrwxr-x 2 root tracer 4096 Jan 20 12:25 convert.tracer.com subv:/www/tracer/ groups frank frank : frank tracer subv:/www/tracer/ > convert.tracer.com/test -bash: convert.tracer.com/test: Permission denied subv:/www/tracer/ Output of "ls -bail /www/tracer/convert.tracer.com/": subv:~/ ls -bail /www/tracer/convert.tracer.com/ total 8 38010883 drwxrwxr-x 2 root tracer 4096 Jan 20 12:25 . 38010882 drwxr-xr-x 3 root root 4096 Jan 20 12:25 .. subv:~/

Group membership is re-read on login. `groups` seem to report the groups you are in according to `/etc/group` and does not reflect membership of groups in the current session.

Use the command `id -Gn` to show the groups that you are currently an active member of. Solution: relogin to apply the group changes.