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Keeping Your Computer Secure
Turn off all unnecessary services
- # lsof -i will tell you what's listening for network connections
- Look into /etc/rcN.d (where N is your default runlevel) for stuff that gets executed after booting. Delete everything you don't need
Patch your system regularly (up2date, apt-get, YaST)
Only use the “root” account when you have to!
Never authenticate over unencrypted connections
- SSH, not telnet
- Get your emails over TLS
- Click on “Secure Login” for webmail
Notes: