How to switch to the root user mode in ubuntu

How can I switch to the root user mode in ubuntu? after installing ubuntu, I wonder if I have such doubts. how can I switch to the root user. In fact, this is the problem. after we install the system, the default root user is not activated. if we want to switch to the root user, we must... how can I switch to the root user mode in ubuntu? after installing ubuntu, I wonder if I have such doubts. how can I switch to the root user. The problem is that after the system is installed, the default root user is not activated. to switch to the root user, the root user must be activated first. how can this problem be activated! For www.2cto.com, we can use the passwd command to set the root password, so that we can switch to the root mode through su root. of course, when installing the system, the created account actually has the root permission, we only need to enter the password for authorization when performing some restriction operations. This avoids the damage to the system caused by some illegal operations! Author Feng Xiaoye Yin