查看Linux系统内所有账户信息命令
vipw 编辑密码文件，并且上锁，其他人是无法修改成功的。
vipw 会打开/etc/password文件，可以对其进行编辑。
vipw -s :修改/etc/shadow文件
vipw
会显示所有包括自建和程序自身使用的账户。
[root@localhost shell_21_user]# vipw
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/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:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
systemd-bus-proxy:x:999:998:systemd Bus Proxy:/:/sbin/nologin
systemd-network:x:998:997:systemd Network Management:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
polkitd:x:997:996:User for polkitd:/:/sbin/nologin
abrt:x:173:173::/etc/abrt:/sbin/nologin
unbound:x:996:994:Unbound DNS resolver:/etc/unbound:/sbin/nologin
tss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologin
colord:x:995:993:User for colord:/var/lib/colord:/sbin/nologin
usbmuxd:x:113:113:usbmuxd user:/:/sbin/nologin
geoclue:x:994:991:User for geoclue:/var/lib/geoclue:/sbin/nologin
saslauth:x:993:76:Saslauthd user:/run/saslauthd:/sbin/nologin
libstoragemgmt:x:992:990:daemon account for libstoragemgmt:/var/run/lsm:/sbin/nologin
rpc:x:32:32:Rpcbind Daemon:/var/lib/rpcbind:/sbin/nologin
rtkit:x:172:172:RealtimeKit:/proc:/sbin/nologin
chrony:x:991:988::/var/lib/chrony:/sbin/nologin
radvd:x:75:75:radvd user:/:/sbin/nologin
qemu:x:107:107:qemu user:/:/sbin/nologin
ntp:x:38:38::/etc/ntp:/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
avahi-autoipd:x:170:170:Avahi IPv4LL Stack:/var/lib/avahi-autoipd:/sbin/nologin
setroubleshoot:x:990:987::/var/lib/setroubleshoot:/sbin/nologin
sssd:x:989:986:User for sssd:/:/sbin/nologin
pulse:x:171:171:PulseAudio System Daemon:/var/run/pulse:/sbin/nologin
gdm:x:42:42::/var/lib/gdm:/sbin/nologin
gnome-initial-setup:x:988:983::/run/gnome-initial-setup/:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin
postfix:x:89:89::/var/spool/postfix:/sbin/nologin
tcpdump:x:72:72::/:/sbin/nologin
user-2d:x:1000:1000:user-2d:/home/user-2d:/bin/bash
2d:x:1001:1001:2d:/home/2d:/bin/bash
saned:x:987:981:SANE scanner daemon user:/usr/share/sane:/sbin/nologin
gluster:x:986:980:GlusterFS daemons:/run/gluster:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
www:x:985:979::/home/www:/sbin/nologin
vipw: /etc/passwd is unchanged
就酱。