rlogin's aim is to open an interactive session with a remote host. rsh can do that also but is mainly used to run a command remotely. Access control is generall

rlogin's aim is to open an interactive session with a remote host. rsh can do that also but is mainly used to run a command remotely. Access control is generally configured on the remote host using a file named .rhosts. If there is no authorisation in .rhosts, rlogin will ask for the password. rexec is used to launch a remote command using a login and a password. For convenience, these passwords can be stored locally in a file named .netrc.