OVALFileLinker from SCAP Security Guide ssg: [0, 1, 80], python: 3.10.12 5.11.2 2026-01-26T22:10:23 Ensure that System Accounts Do Not Run a Shell Upon Login Ubuntu 22.04 The root account is the only system account that should have a login shell. /etc/login.defs .*(?:^|\n)\s*(UID_MIN[\s]+[\d]+)\s*(?:$|\n) 1 /etc/login.defs .*(?:^|\n)\s*(SYS_UID_MIN[\s]+[\d]+)\s*(?:$|\n) 1 /etc/login.defs .*(?:^|\n)\s*(SYS_UID_MAX[\s]+[\d]+)\s*(?:$|\n) 1 /etc/passwd ^(?!root).*:x:([\d]+):[\d]+:[^:]*:[^:]*:(?!\/usr\/sbin\/nologin|\/sbin\/nologin|\/bin\/sync|\/sbin\/shutdown|\/sbin\/halt|\/bin\/false|\/usr\/bin\/false).*$ 1 0