The root file system uses logon mode and root file logon mode.
1. etc/inittab:
: Sysinit:/etc/init. d/rcS
: Respawn:/bin/login
#: Respawn:-/bin/sh
: Restart:/sbin/init
: Ctrlaltdel:/bin/umount-a-r
2. etc/passwd
Root: x: 0: 0: root:/bin/bash
Bin: x: 1: 1: bin:/sbin/nologin
Daemon: x: 2: 2: daemon:/sbin/nologin
Adm: x: 3: 4: adm:/var/adm:/sbin/nologin
Lp: x: 4: 7: lp:/var/spool/lpd:/sbin/nologin
Sync: x: 5: 0: sync:/sbin:/bin/sync
Shutdown: x: 6: 0: shutdown:/sbin/shutdown
Halt: x: 7: 0: halt:/sbin/halt
Mail: x: 8: 12: mail:/var/spool/mail:/sbin/nologin
News: x: 9: 13: news:/etc/news:
Uucp: x: 10: 14: uucp:/var/spool/uucp:/sbin/nologin
Operator: x: 11: 0: operator:/root:/sbin/nologin
Games: x: 12: 100: games:/usr/games:/sbin/nologin
Gopher: x: 13: 30: gopher:/var/gopher:/sbin/nologin
Ftp: x: 14: 50: FTP User:/var/ftp:/sbin/nologin
Nobody: x: 99: 99: Nobody: // sbin/nologin
Rpm: x: 37: 37:/var/lib/rpm:/bin/bash
Vcsa: x: 69: 69: virtual console memory owner:/dev:/sbin/nologin
Nscd: x: 28: 28: NSCD Daemon: // sbin/nologin
Sshd: x: 74: 74: Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
Rpc: x: 32: 32: Portmapper RPC user: // sbin/nologin
Rpcuser: x: 29: 29: RPC Service User:/var/lib/nfs:/sbin/nologin
Nfsnobody: x: 65534: 65534: Anonymous NFS User:/var/lib/nfs:/sbin/nologin
Mailnull: x: 47: 47:/var/spool/mqueue:/sbin/nologin
Smmsp: x: 51: 51:/var/spool/mqueue:/sbin/nologin
Pcap: x: 77: 77:/var/arpwatch:/sbin/nologin
Apache: x: 48: 48: Apache:/var/www:/sbin/nologin
Xfs: x: 43: 43: X Font Server:/etc/X11/fs:/sbin/nologin
Named: x: 25: 25: Named:/var/named:/sbin/nologin
Ntp: x: 38: 38:/etc/ntp:/sbin/nologin
EM: x: 42: 42:/var/EM:/sbin/nologin
Hujs: x: 1000: 1000: hujs,:/home/hujs:/bin/bash