1. Admin Tutorial

2. Our Architechture Riviera – all user accounts, website, email
AMD x64 2.5Ghz, 6GB RAM, 400GB RAID 1, Ubuntu 8.04 LTS
Scorpio – backups
AMD x64 2Ghz, 1GB RAM, 6x1TB RAID 1, Ubuntu 8.04 LTS
IBM eServers (x4) – admin training, misc, otto has access to outside world
AMD x64 2.4Ghz, 8GB RAM, 147GB HDD

3. Riviera LAMP Stack (Linux, Apache, MySQL, PHP)
/home across 2 400GB HDDs in RAID 1
Exim mail server, with roundcube front end
Joomla web site install
XMPP server
LDAP user authentication (allows for single sign in account – except for MySQL)

4. System Information top df -h lshw -html > info.html uptime uname -a
who
groups <user>

5. Admin Toolbox find command (or locate) |, > screen tail -f Less Vim
ps and pkill

6. Regular Maintenance sudo apt-get update;sudo apt-get upgrade
Creating user accounts – LDAP – in later tutorial
Creating MySQL accounts
Fixing file permissions
Resetting user passwords

7. Permissions -rw-r--r-- 1 slibuntu users
1st bit – d for directory, blank for file, l for link
2,3,4 – Owner
5,6,7 – Group
8,9,10 – Others
umask -S shows default perms for new files
Edit with chmod xxx <file> or chmod -R xxx <folder>

8. Users, Groups
chown <user>:<group> file

9. Logs When something goes wrong, logs are the first place to look.
/var/log/*