Password - Revision history

Pbug at 12:25, 10 October 2005

2005-10-10T12:25:49Z

← Older revision		Revision as of 05:25, 10 October 2005
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	'''Note:''' passwords are never echo'ed and don't display a * or other sign per character typed. This is to ensure that noone can get an idea of how long your password is which would greatly ease their cracking efforts. If you ever see your password displayed as you type it, abort immediately and search for causes why it doesn't work right, contact your system administrator.		'''Note:''' passwords are never echo'ed and don't display a * or other sign per character typed. This is to ensure that noone can get an idea of how long your password is which would greatly ease their cracking efforts. If you ever see your password displayed as you type it, abort immediately and search for causes why it doesn't work right, contact your system administrator.


			=== How to program with password authentication ===

			Examples are the login(1) [[source code]]. Easy functions explaining password operations include the getpwent(3) and getpass(3) [[manual]] pages as well as crypt(3).

Pbug: /* How to change a password */

2005-10-10T12:17:00Z

How to change a password

← Older revision		Revision as of 05:17, 10 October 2005
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	To change your password type '''passwd''' and the system will ask you to enter your current password as a security measure, unless you are [[root]].		To change your password type '''passwd''' and the system will ask you to enter your current password as a security measure, unless you are [[root]].

			$ passwd
			Changing local password for user.
			Old password:
			New password:
			Please enter a longer password.
			New password:
			Please don't use all-digit passwords.
			Please use a different password. Unusual capitalization,
			control characters, or digits are suggested.
			New password:
			Retype new password:
			Mismatch; try again, EOF to quit.
			New password: ^D
			Password unchanged.
			$

			'''Note:''' passwords are never echo'ed and don't display a * or other sign per character typed. This is to ensure that noone can get an idea of how long your password is which would greatly ease their cracking efforts. If you ever see your password displayed as you type it, abort immediately and search for causes why it doesn't work right, contact your system administrator.

Pbug at 12:08, 10 October 2005

2005-10-10T12:08:48Z

New page

Access to a UNIX system historically was granted by means of passwords. These consisted of all keys on a typical US keyboard and were at first limited in length. Implementations exist for one time passwords also called [[skey]]. Another method for access to UNIX systems are [[Kerberos]] passwords. A Unix system is not limited to it's own password database to grant access to users, alternative are [[NIS]] or using [[PAM]] for a variety of password implementations.

=== How to change a password ===

To change your password type '''passwd''' and the system will ask you to enter your current password as a security measure, unless you are [[root]].