If specifying the NFS client in /etc/exports by domain or hostname ensure the domain name maps to the correct IP, an incorrect entry in /etc/hosts for example could cause access to be denied
Steps to Add Sudo User on Ubuntu
Add a cron job to root's cron table
sh at startup: @reboot /path/to/script
Enter the command in the “Command” field, and then type a name and comment
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Press the a key