post_install() { getent group syncstorage &>/dev/null || groupadd -r syncstorage >/dev/null getent passwd syncstorage &>/dev/null || useradd -r -s /usr/bin/false \ -g syncstorage -G syncstorage syncstorage >/dev/null } pre_remove() { getent passwd syncstorage &>/dev/null && userdel syncstorage >/dev/null getent group syncstorage &>/dev/null && groupdel syncstorage >/dev/null true }