cs312-lecture5_slides

Cs312-lecture5_slide - Announcements Note Taker Needed HW1 Due HW2 Posted due 4/21 by 2PM Read Chapter 3 Chapter 5(only Section 5.5 Chapter 6(skip

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2 Announcements Note Taker Needed HW1 Due HW2 Posted; due 4/21 by 2PM Read Chapter 3, Chapter 5 ( only Section 5.5), Chapter 6 ( skip sections 6.2 and 6.3)
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4 Usernames User info: /etc/passwd Passwords: /etc/shadow in hashed format $1$xxUwcovy$JfV9i7j9H/NFA3RBCrVHN. 'man 5 passwd' gives you the format of /etc/passwd Passwords stored in hashed format in /etc/shadow Older systems had 8 character limit for usernames, current systems have no hard limit, but some system tools define limits of around 32 characters
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5 User ID Numbers (UIDs) System cares about UIDs, not usernames UID 0 = root 0-99 typically used by system accounts Picture © Flickr user 'stewf' CentOS starts adding local users at uid 500 when using 'useradd' Max UID is typically 65,535 but you should be able to increase this if needed
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6 Group ID Numbers (GIDs) Similar to UIDs, but for numbering groups GID 0 = root (group) Users can be in multiple groups, but have one “default” group Picture © Flickr user 'stewf'
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This note was uploaded on 06/28/2009 for the course CS 312 taught by Professor Staff during the Spring '08 term at Oregon State.

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Cs312-lecture5_slide - Announcements Note Taker Needed HW1 Due HW2 Posted due 4/21 by 2PM Read Chapter 3 Chapter 5(only Section 5.5 Chapter 6(skip

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