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TOPICS
System Administration
Basic SSH Security
secure your SSH daemon to prevent unauthorized logins
Encrypted Backups
securely backup potentially sensitive data with gpg and rsync
E-mail
Configure Postfix to Relay over SMTP+SASL
relay e-mail from your server reliably and securely via Gmail or another mail service
DNS
Setup a Local Caching Nameserver
resolve domain names locally instead of via a public DNS service
SSL
Use Let's Encrypt for SSL
obtain SSL certificates through the free, automated, and open Let's Encrypt platform
Tutorials
Tutorials
We have various tutorials to get you started. Select a topic to read the tutorials.