#Su vs sudo su upgrade
#Su vs sudo su password

Su will switch you to another user environment will open a session of that user, and you will become that user, it can be root or any other, sudo will upgrade your privileges and let you run commands as root, provided you have the rights, that is you are listed in sudoers file.

#Su vs sudo su password

That will ask user's password and then run ls command as root, you have to configure the sudoers fileĪs you can see, one can achieve same goal (run privileged commands) with both su and sudo they work in different ways and they are made for different things, it is up to you to use the most appropriate command deppending on your needs and general scenario. Sudo is a different beast, if you want to give some users access to perform some tasks as root without given them root's password, you will have to use sudo command, in this case those users just have to enter their own passwords and run something like this: sudo ls / En cas de succès, linvite deviendra le caractère « ». Le système vous demandera votre mot de passe. Will switch you to root, you will have to know root's password La manière traditionnelle de rooter une configuration Linux, à lépoque dUnix, consiste à utiliser la commande su : su '-' signifie que vous aurez le même environnement que si vous étiez connecté directement en tant quutilisateur root. Will switch your current user to john, provided you know john's password, if you want to get all environment variables that john get when he logs in you can use: su - johnĪfter that you can run commands in john's environment su. Therefore, it is much safer to use sudo since it doesn’t include exchanging sensitive information. The main difference between the two is that su requires the password of the target account, while sudo requires the password of the current user. In few words su command switches user, from your current user to any other one, it may be root or not su john Edit: BTW - the reason for the difference between sudo renew and sudo su - renew is that the latter causes the shell definitions to be redefined by. Both su and sudo elevate privileges assigned to the current user. The optional argument - may be used to provide an environment similar to what the user would expect had the user logged in directly The sudo command is used when you want to run a command that requires the root privileges. Invoked without a username, su defaults to becoming the superuser. The su command switches to the root user or another user account, while the sudo command temporarily elevates a users privileges to perform tasks as a. The su command is used to become another user during a login session. With Linux like with most things in life you have different ways to accomplish a specific task, this is the case of su and sudo they are different commands with different goals but they are usually used one instead the other.