After new instal Linux Mint i can not sign in as “su” , because command line does not want to take password which I have used during installation. What should I do to make it work?
Thank you .
Mint/Ubuntu Linux system’s come with undefined root password after the installation hence you cannot use su command to login to root shell as the root password is unknown. This is a default and normal behavior.
In order to access root’s command line you can execute:
$ sudo -i
After you enter your password you will be presented with root shell indicated by # character. Alternatively you can run any command with root privileges by simply prefixing any any command with sudo
. Example:
$ sudo some_command
If you need to change to root shell by using the su
command you first need to set root password. For example:
$ sudo passwd
After executing the above sudo command you will be first asked for your current user password. After the you will need to re-type a new root password two times. This will set a new password after which you can use the su command to access the root shell. Example:
$ su
Hope this helps
Lubos
set a password for root user in a single go:
sudo passwd root
Test it your root password by typing the following command: su -
[mirandam@charon ~]$ su
Password: <--- Enter root password
[root@charon mirandam]#
echo 'worldstream ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
[root@charon mirandam]# exit
[mirandam@charon ~]$
du -sh /root
du: `/root': Permission denied <--- Fails!!!
[mirandam@charon ~]$ #
sudo du -sh /root
163M /root <--- Works!!!