GROUPS
包含用户所在组的数量的数组:
#!/usr/bin/env bash
echo You are assigned to the following groups:
for group in ${GROUPS[@]}; do
IFS=: read -r name dummy number members < <(getent group $group )
printf "name: %-10s number: %-15s members: %s\n" "$name" "$number" "$members"
done