Specifications
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Chapter 1: Agilent Technologies 16700A/B-Series Logic Analysis System
The System Administration Tools
• Set user permissions for new file creation.
• Set the system time.
• Set NFS export permissions from the logic analysis system.
Legal Passwords
• Passwords must be at least 6 characters long.
• Passwords cannot be circular shift of your login ID.
• Old and new passwords must differ by at least 3 positions.
Passwd Man Page
The following man page documents the use of a password file.
NAME
passwd - password file, pwd.h
DESCRIPTION
passwd contains the following information for each user:
+ login name
+ encrypted password
+ numerical user ID
+ numerical group ID
+ reserved field, which can be used for identification
+ initial working directory
+ program to use as shell
This is an ASCII file. Each field within each user's entry is
separated from the next by a colon. Each user is separated from the
next by a newline. This file resides in the /etc directory. It can
and does have general read permission and can be used, for example, to
map numerical user IDs to names. If the password field is null and
the system has not been converted to a trusted system, no password is
demanded.
If the shell field is null, /usr/bin/sh is used.
The encrypted password consists of 13 characters chosen from a 64-
character set of "digits" described below, except when the password is
null, in which case the encrypted password is also null. Login can be
prevented by entering in the password field a character that is not
part of the set of digits (such as *).
The characters used to represent "digits" are . for 0, / for 1, 0
through 9 for 2 through 11, A through Z for 12 through 37, and a
through z for 38 through 63.
PASSWORD AGE
Password aging is put in effect for a particular user if his encrypted
password in the password file is followed by a comma and a nonnull
string of characters from the above alphabet. (Such a string must be
introduced in the first instance by a superuser.) This string defines
the "age" needed to implement password aging.
The first character of the age, M, denotes the maximum number of weeks
for which a password is valid. A user who attempts to login after his
password has expired is forced to supply a new one. The next