sudo may be configured to stop requesting passwords for specific commands to specific users or groups. This is very convenient for personal computers where there is only a user (and therefore she’s the administrator).

With next file /etc/sudoers, the sudo group members will be allowed to run apt, apt-get and dpkg commands absolutelly with no password.

For other users, the sudo behaviour do not change.

Defaults        env_reset, insults
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Defaults        timestamp_timeout=15

Cmnd_Alias APT = /usr/bin/apt, /usr/bin/apt-get, /usr/bin/dpkg

Option ‘timestamp_timeout’ sets the time (in minutes) that the password will remain in cache, so it will not ask for it during that period. The value 0 disables the cache.

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