In that case, use: sudo su - to execute a login shell as root after auhenticating sudo, and that shell will not need sudo to run admin commands. To return to the normal user shell, insert the command exit.
On Docker's documentation pages, all example commands are shown without sudo, like this one: docker ps On Ubuntu, the binary is called docker.io. It also does not work without sudo: sudo docker.io...
$ sudo -i [sudo] password for myuseraccount: # here you type the user's password # A lot of people that have Unix background or experience with other distributions stumble on this issue quite often. The command su will always fail because the root account is locked; it cannot be accessed directly or you cannot login directly to root.
GizChina: Microsoft confirms sudo command will not be available on Windows Server
81 sudo lets you run commands in your own user account with root privileges. su lets you switch user so that you're actually logged in as root. sudo -s runs a shell with root privileges. sudo -i also acquires the root user's environment. To see the difference between su and sudo -s, do cd ~ and then pwd after each of them.
sudo - Sudoers file, enable NOPASSWD for user, all commands - Ask Ubuntu
sudo su - This time it is a login shell, so /etc/profile, .profile and .bashrc are executed and you will find yourself in root's home directory with root's environment. sudo -i It is nearly the same as sudo su - The -i (simulate initial login) option runs the shell specified by the password database entry of the target user as a login shell.