Voir aussi :
runs as a different user with password
su - username <<EOF enterpasswordhere enter commands to run as the new user EOF
Voir aussi :
root is prompted for the user1's password
Source : https://bbs.archlinux.org/viewtopic.php?id=217142
/etc/pam.d/su /etc/pam.d/su-l
auth sufficient pam_rootok.so