![]() If you happen to be running only Ubuntu on your machine, after powering it, press the Shift key for a few seconds to get the Grub boot menu. What if you are denied usage of sudo due one or more of the reasons we mentioned above.īelow is an image showing a case in which the default system user is being prevented from running sudo command: ~ $ sudo visudoĪaronkilik is not in the sudoers file. In order to perform crucial tasks on your system such as viewing or altering important system files, or updating the system, you need the sudo command to gain super user privileges.
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