I want to login as root, but when I enter
sudo -s
and enter password, this message is shown: "you are not in sudoers file", and when I enter
su
and enter password, this is shown: "authentication failure".
My os has one account only. about past1 hours ago I log on as root and do some commands , when I logout , I can't login another time!
Best Answer
The
su
command requires you to put in root password. Root user on Ubuntu in general is locked so no user can login asroot
thussu
is not likely to work.For
sudo -s
to work you will have to be part of theadmin
group on an Ubuntu machine, which apparently you are not.If you are the only user on the system that is concerning and may be quite involved to fix. If not I would suggest you talk to the System Administrator or owner of the system to see if you even can get
root
privileges.