1-18password: Password. The password must be in plain text if you specify the simple keyword in the setauthentication password command. If you specify the cipher keyword, the password can be in eitherencrypted text or plain text. Whether the password is in encrypted text or plain text depends on thepassword string entered. Strings containing up to 16 characters (such as 123) are regarded as plain textpasswords and are converted to the corresponding 24-character encrypted password (suchas !TP<\*EMUHL,408`W7TH!Q!!). A encrypted password must contain 24 characters and must be inciphered text (such as !TP<\*EMUHL,408`W7TH!Q!!).DescriptionUse the set authentication password command to set the local password.Use the undo set authentication password command to remove the local password.Note that only plain text passwords are expected when users are authenticated.By default, Telnet users need to provide their passwords to log in. If no password is set, the “Loginpassword has not been set !” message appears on the terminal when users log in.Examples# Set the local password of VTY 0 to “123”. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] user-interface vty 0[Sysname-ui-vty0] set authentication password simple 123shellSyntaxshellundo shellViewUser interface viewDefault Level3: Manage levelParametersNoneDescriptionUse the shell command to make terminal services available for the user interface.Use the undo shell command to make terminal services unavailable to the user interface.