Below is a ready-to-use script. Review and adapt variables to your environment.
#!/usr/bin/env bash set -euo pipefail echo "== Users ==" cut -d: -f1,3,7 /etc/passwd | column -t echo echo "== Sudoers (files) ==" grep -R --line-number -E '^[^#].*ALL' /etc/sudoers /etc/sudoers.d || true echo echo "== Recent logins ==" last -n 20 || true