08-24-2010
I would definitely like to hear about these 'better, faster and simpler ways'. As I said, I'm new to UNIX and there are plenty of stuff to learn so any advice would be appreciated. The whole script is ~100 lines, so I probably won't paste it here. But if you like to know what other fields of that line are used for, then here it is:
PIN000 - Three last digits are used as a password for user's account (I use PIN in front so the user's entry is more easily read, though I would like to encrypt this field in the future for security reasons.
FirstName.LastName - Used to identify the user.
AccountNumber - I don't use this one for now, but this is a fixed length number. I plan to use this number for transactions between users within the system.
Basically, it's just a simple script used to manage users' finances in a simple 'deposit' 'withdraw' manner. However, it's very limited as of now, cause all the changes done by the user are not saved into his/her user entry (that line in the file).
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GSHADOW(5) File Formats and Conversions GSHADOW(5)
NAME
gshadow - shadowed group file
DESCRIPTION
/etc/gshadow contains the shadowed information for group accounts.
This file must not be readable by regular users if password security is to be maintained.
Each line of this file contains the following colon-separated fields:
group name
It must be a valid group name, which exist on the system.
encrypted password
Refer to crypt(3) for details on how this string is interpreted.
If the password field contains some string that is not a valid result of crypt(3), for instance ! or *, users will not be able to use a
unix password to access the group (but group members do not need the password).
The password is used when a user who is not a member of the group wants to gain the permissions of this group (see newgrp(1)).
This field may be empty, in which case only the group members can gain the group permissions.
A password field which starts with an exclamation mark means that the password is locked. The remaining characters on the line
represent the password field before the password was locked.
This password supersedes any password specified in /etc/group.
administrators
It must be a comma-separated list of user names.
Administrators can change the password or the members of the group.
Administrators also have the same permissions as the members (see below).
members
It must be a comma-separated list of user names.
Members can access the group without being prompted for a password.
You should use the same list of users as in /etc/group.
FILES
/etc/group
Group account information.
/etc/gshadow
Secure group account information.
SEE ALSO
gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1).
shadow-utils 4.5 01/25/2018 GSHADOW(5)