/etc/shadow File Details

The/etc/shadow file is used to store the user's password in ciphertext form. The file is described in more detail below.

[[email protected] ~]# ls-l/etc/shadow# view file details

----------1 root root 908 December 18:20/etc/shadow

[[email protected] ~]# cat/etc/shadow# View the contents of the file

root:$6$uxt.2khv$z/tiqguvgwaa/kvgnj7gpaw5lentb.sas77yj.kszb0z1jjcnemgusy1djx6yw7qwyi7i4rjblgxyav7ezdgd/ : 17145:0:99999:7:::

Bin:*:15980:0:99999:7:::

Daemon:*:15980:0:99999:7:::

Adm:*:15980:0:99999:7:::

Lp:*:15980:0:99999:7:::

Sync:*:15980:0:99999:7:::

Shutdown:*:15980:0:99999:7:::

Halt:*:15980:0:99999:7:::

Mail:*:15980:0:99999:7:::

Uucp:*:15980:0:99999:7:::

Operator:*:15980:0:99999:7:::

Games:*:15980:0:99999:7:::

Gopher:*:15980:0:99999:7:::

Ftp:*:15980:0:99999:7:::

Nobody:*:15980:0:99999:7:::

dbus:!! : 17143::::::

vcsa:!! : 17143::::::

saslauth:!! : 17143::::::

postfix:!! : 17143::::::

Sshd:!! : 17143::::::

user1:!! : 17147:0:99999:7:::

user12:!! : 17147:0:99999:7:::

Rachy:$6$l.nlxy2z$eqznbntbynwed0buu31prikyu2xhwydnkvbhnc/3fjun.91kaohkmfhz9nf543uannrmhqd0.o165jy25eazz1 : 17149:0:99999:7:::

Jack:$6$s09chyth$7xoy5bi6ytrmu8ofqvoc5biiv1hmdmnkcgrvtk9rwtnqbkzz/w8ix2pyxf9f3lnftiqohocefpnipy/viv6g2. : 17149:0:99999:7:::

[Email protected] ~]#

A row represents a user's information, each row has 9 fields, and each field has the following meanings:

User name: Password: Last modified: Time to modify: Password expiration: Issue warning Time: Expiry expiration: Password life cycle: Reserved fields

User name: User name

Password: the password after encryption. usually starts with $6$; * Indicates that the account is locked;!! Indicates that the account does not have a password.

Last modified: Days from 1970.1.1 to last changed password

Modified: 0 means you can modify it at any time

Password expiration: The number of days after the password expires, the default is 99999

Issue warning Time: number of days before expiry warning, default is 7

Expiry time: The number of days after expiration lock account, default is empty

Account life cycle: How long the account can be used, default is empty

Reserved field: Default is empty

/etc/shadow File Details