By default sudo remembers your password for 15 minutes.
Disable sudo timeout with this command:
sudo sh -c 'echo "\nDefaults timestamp_timeout=-1">>/etc/sudoers'
To re-enable sudo timeout use this command:
sudo sed -i "/Defaults timestamp_timeout=-1/d" /etc/sudoers
You can also change or disable sudo timeout with visudo.
sudo visudo
This opens an editor and points it to the sudoers file — Ubuntu defaults to nano, other systems use Vi.
To the defaults line, add :
timestamp_timeout=2
So it will look like this:
Defaults env_reset,timestamp_timeout=20
You might want to read the sudoers manual pages for additional information.
man sudoers
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