karl@karl-pc:~$ sudo chmod +w /etc/sudoers [sudo] password for karl: karl@karl-pc:~$ sudo vi /etc/sudoers [1]+ Stopped sudo vi /etc/sudoers karl@karl-pc:~$ sudo vi /etc/sudoers karl@karl-pc:~$ sudo cat /etc/sudoers # # This file MUST be edited with the 'visudo' command as root. # # Please consider adding local content in /etc/sudoers.d/ instead of # directly modifying this file. # # See the man page for details on how to write a sudoers file. # Defaults env_reset Defaults mail_badpass Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin" # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification root ALL=(ALL:ALL) ALL karl ALL=(ALL:ALL) ALL # Members of the admin group may gain root privileges %admin ALL=(ALL) ALL # Allow members of group sudo to execute any command %sudo ALL=(ALL:ALL) ALL # See sudoers(5) for more information on "#include" directives: #includedir /etc/sudoers.d karl@karl-pc:~$ sudo chmod -w /etc/sudoers