A detailed description of the 9 fields for the 7 fields and passwords of the user name under Linux

I. Viewing user names

cat/etc/passwd

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A total of 7 parts per line separated by a colon

The first paragraph refers to the user name

The second paragraph is the user's password

The third paragraph refers to the UID, each user has their own UID

The fourth paragraph refers to the group UID, each user has a different UID

The fifth paragraph is the field that explains the description

The sixth paragraph refers to the user's home directory

The seventh paragraph refers to the shell

Two. View the password file

Cat/etc/shadow

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9 fields are split

The first field is a user name

The second field is the user's password

Third field The last time the password was changed, elapsed time (1970.1.1-now elapsed time)

Fourth field How many geniuses can you change your password?

Number of days before the fifth field password expires

Sixth field password expiration how many days a warning is issued

the Seventh field default NULL indicates the expiration date of the account. number of days after expiry lock account

The life cycle of the eighth field account

The Nineth field is a reserved value

A detailed description of the 9 fields for the 7 fields and passwords of the user name under Linux