https://bbs.archlinux.org/viewtopic.php?id=105541
New user created as:
groupadd mygroup
useradd -s /bin/bash -g myuser -m -k /dev/null myuser
When trying to log in:
[root@baraka ~]# su - myuser
su: /bin/bash: Permission denied
Solution:
chmod 755 /
chmod 755 /bin
[root@baraka ~]# su - myuser
[myuser@baraka ~]$