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Old 01-26-2014, 08:29 PM   #1
samalchow
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Registered: Jan 2014
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chage command - minimum numbers of days


So I've changed this setting, just to play around with it, for my default user to '2'.

But let I can freely change my password multiple times during the day. Is there something that needs to get restarted before the changes take affect?
 
Old 01-27-2014, 04:17 AM   #2
myatthu
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Can you put the output of chage -l
Code:
chage -l <username>
 
Old 01-27-2014, 08:09 PM   #3
samalchow
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Last password change : Jan 27, 2014
Password expires : Feb 21, 2014
Password inactive : never
Account expires : never
Minimum number of days between password change : 2
Maximum number of days between password change : 25
Number of days of warning before password expires : 7
 
Old 01-27-2014, 11:00 PM   #4
myatthu
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It is strange. How do you try to change password?
For your reference, below is my test account.

Code:
chage -l testuser
Last password change                                    : Jan 28, 2014
Password expires                                        : never
Password inactive                                       : never
Account expires                                         : never
Minimum number of days between password change          : 1
Maximum number of days between password change          : 99999
Number of days of warning before password expires       : 7
That is feedback message

Code:
Changing password for testuser.
(current) UNIX password:
You must wait longer to change your password
passwd: Authentication token manipulation error
passwd: password unchanged
 
Old 01-28-2014, 12:19 AM   #5
samalchow
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Using the passwd command

Is there other ways of changing it?
 
Old 01-28-2014, 12:55 AM   #6
myatthu
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Do you enable shadow file? Run pwconv to enable it.
Code:
pwconv
 
Old 01-28-2014, 07:10 PM   #7
samalchow
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Quote:
Originally Posted by myatthu View Post
Do you enable shadow file? Run pwconv to enable it.
Code:
pwconv

What will that do?
 
Old 01-28-2014, 07:42 PM   #8
myatthu
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chage command required shadow password enabled
 
Old 01-29-2014, 03:19 PM   #9
clacour
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Quote:
Originally Posted by samalchow View Post
What will that do?
It will move the passwords out of /etc/passwd, and into a file called /etc/shadow. /etc/shadow is normally much more restricted than /etc/passwd, so people can't get the passwords and try a dictionary attack on them.

If this is your own machine, I'd recommend it - it's much more secure.

If this machine doesn't belong to you (belongs to the company, for example), get the ok before doing it. I can't imagine any company knowingly NOT using shadow passwords, but still not a good idea to change things without warning them.
 
  


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