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COP 4343 Unix System Administration
Unit 4: system administrator create users/groups
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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
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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
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User accounts user account types: every user belongs to group(s) root
regular user special accounts every user belongs to group(s)
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User accounts Login with userid and password
ssh, login Assume superuser privilege su sudo visudo
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User accounts 3 ways to create: edit system files
useradd command family graphical utility
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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
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Create user accounts useradd command family useradd, userdel
groupadd, groupdel /etc/skel directory
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