Red Hat ENTERPRISE LINUX WS 2.1 - Instalační příručka stáhnout pdf (Strana 218)

218 Important Linux features

DONE

INDEX

• has one line for each group on the system

Each line contains 4 fields separated by colons:

example

root::0:root

users::100:guest,jim

meaning of the fields:

1. the Group Name

2. encrypted group password; usually empty

3. group Id; must be unique for a group and the same on each host

4. the list of users who belong to this group, separated by commas

Why are users divided into groups?

You can share your files with users within your group and protect them from all

other users.

The file /etc/group can only be changed by root.

13.2.4 .bashrc

The file .bashrc:

• sets your personal Linux environment

• is executed every time you log in

• resides in your home directory

• is used in connection with the shells sh and bash

You can edit the file .bashrc and add your personal preferences, e.g.:

• umask 002

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Red Hat ENTERPRISE LINUX WS 2.1 - Instalační příručka Strana 218