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SHADOW(5)		      File Formats Manual		     SHADOW(5)

NAME
       shadow -	encrypted password file

DESCRIPTION
       shadow  contains	the encrypted password information for user's accounts
       and optional the	password aging information.  Included is

	    Login name

	    Encrypted password

	    Days since Jan 1, 1970 that	password was last changed

	    Days before	password may be	changed

	    Days after which password must be changed

	    Days before	password is to expire that user	is warned

	    Days after password	expires	that account is	disabled

	    Days since Jan 1, 1970 that	account	is disabled

	    A reserved field

       The password field must be filled.  The encryped	password  consists  of
       13  to 24 characters from the 64	character alphabet a thru z, A thru Z,
       0 thru 9, . and /.  Refer to crypt(3) for details on how	this string is
       interpreted.

       The  date  of  the  last	password change	is given as the	number of days
       since Jan 1, 1970.  The password	may not	be  changed  again  until  the
       proper  number of days have passed, and must be changed after the maxi-
       mum number of days.  If the minimum number of days required is  greater
       than  the  maximum  number  of  day  allowed,  this password may	not be
       changed by the user.

       An account is considered	to be inactive and is disabled if the password
       is  not	changed	within the specified number of days after the password
       expires.	 An account will also be disabled on the specified day regard-
       less of other password expiration information.

       This  information  supercedes  any password or password age information
       present in /etc/passwd.

       This file must not be readable by regular users if password security is
       to be maintained.

FILES
       /etc/passwd - user account information
       /etc/shadow - encrypted user passwords

SEE ALSO
       chage(1),  login(1),  passwd(1),	 su(1),	 passwd(5),  pwconv(8),	 pwun-
       conv(8),	sulogin(8)

AUTHOR
       Julianne	Frances	Haugh (jockgrrl@ix.netcom.com)

								     SHADOW(5)

NAME | DESCRIPTION | FILES | SEE ALSO | AUTHOR

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