Default /etc/sudoers file (Checked on on Ubuntu 18.04 and Ubuntu 20.04) - sudoers. ... This file MUST be edited with the 'visudo' command as root. ... <看更多>

4.2. sudo ... 參考文章. Ubuntu 如何指定使用者為sudoer ? ... (http://www.arthurtoday.com/2015/02/ubuntu-modify-a-invalid-etc-sudoers-file-with-pkexec.html). ... <看更多>

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I solved this error following theses steps: Open the Software Updates application; - In "Other Software" tab unmark all options; - In Ubuntu ... ... <看更多>

Since you have hosed the permissions on the only thing that gives you root level access, you will need some help from OUTSIDE the current software ... ... <看更多>