1. COP 4343 Unix System Administration
Unit 4:
system administrator
create users/groups

2. System Administrator Tasks
Setup/maintain systems
Install software
Create new user accounts
Train users, help users solve problems
Define procedures and policies
Keep up with technical developments

3. Ethics and the System Administrator
System administrators are trusted employees
System administrators have access to valuable personal and business data
Legal and ethical rules control work of a system administrator

4. User accounts user account types: every user belongs to group(s) root
regular user
special accounts
every user belongs to group(s)

5. User accounts Login with userid and password
ssh, login
Assume superuser privilege su
sudo
visudo

6. User accounts 3 ways to create: edit system files
useradd command family
graphical utility

7. Create user accounts edit system files: additional tasks /etc/passwd
/etc/group
/etc/shadow
additional tasks
set password: passwd
create user’s home directory
default content

8. Create user accounts useradd command family useradd, userdel
groupadd, groupdel
/etc/skel directory