Ubuntu 18.04 obtains root permissions and logs in as root user

Written in advance: In the following steps, you need to enter commands in the terminal. Friends who view the blog on the computer can directly copy and paste it into the terminal. Friends who view it on the mobile phone please note that the spaces in the command are required, otherwise the operation will fail.

1. Set the initial password for root

(1) Log in to the system, open the terminal, and enter the command:

sudo passwd root

(Set a password for the root user)

(2) Set a root password (it is recommended to keep it simple, it does not need to be complicated);

(3) Repeat the root password;

2. Modify the content of /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf file

Terminal input:

sudo gedit /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf

Open the file and add the following two lines at the end of the file. Save and close it after completion (pay attention to this step, do not delete the original two lines in the file);

greeter-show-manual-login=true
all-guest=false

3. Enter the /etc/pam.d folder and modify the contents of the gdm-autologin and gdm-password files (refer to the command in step 2):

gdm-autologin file comment out the line auth required pam_success_if.so user!=root quiet_success

gdm-password file comment out the line auth required pam_success_if.so user!=root quiet_success

Note: To make a comment, just add "#" before the line, for example:

#auth required pam_success_if.so user!=root quiet_success

4. Modify the /root/.profile file

Terminal input:

sudo gedit /root/.profile

Open the file and change the last line to the following:

tty -s && mesg n || true

Save and close, restart, and after restarting, select "Not Listed" and enter the account root and password;

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.