Is it possible to disable host name queries in sudo? I do not have
anything specific to particular host names in sudoers, so I would prefer
to avoid network requests from a tool intended for running commands with
escalated privileges.
I admit, system configuration was inconsistent when I noticed DNS
queries. After upgrading a VM, that I am using for various experiments,
I decided to rename it to have "trixie" in its hostname. I put the new
name (short one, not FQDN) into /etc/hostname. The result was delay and
a warning on failed attempt to resolve hostname before sudo password
prompt. I figured out that I forgot to update 127.0.1.1 entry in
/etc/hosts (libnss-myhostname is not installed).
I wonder if it is possible to make sudo purely local tool by adjusting
its configuration. sudoers(5) says that DNS queries may be performed,
but it is necessary to enable fqdn option. I have not noticed a way to
suppress hostname-dependent logic.
- sudo and host name resolver Max Nikulin
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