Practical server, cloud, security and hosting infrastructure guides built around real operational work.
Jump into focused knowledge paths covering the platforms and services behind hosting and production infrastructure.
Commands, services, troubleshooting, hardening and day-to-day Linux operations.
Hosting stack management, mail, DNS, Apache, security and control-panel operations.
Hardening, firewall controls, access security, malware investigation and remediation.
AWS, Azure, DigitalOcean, Linode, Vultr and practical cloud infrastructure guidance.
Database troubleshooting, configuration, replication and performance tuning.
Apache, Nginx, LiteSpeed, PHP and production web-stack troubleshooting.
Detailed guides, operational fixes and production-focused knowledge from our infrastructure support team.
When connecting to the MySQL screens in DirectAdmin, if this error appears, that would indicated that the "da_admin" user has not been setup correctly. To resolve this do the following. Desired root password: Desired…
Read Article
General information for default certificate locations for various services. The order will be cert,key, ca/chain, combined (cert+ca)and their related directadmin.conf settings, where applicable. Apache/LiteSpeed…
Read Article
Download the latest Java SE SDK version Go to the following link and download jdk7. At the time of writing this guide, the jdk version was jdk-7u45-linux-x64. Note that I’m using x64 which is 64-bit. 32-bit users should…
Read Article
Mozilla announced their ‘mozjpeg’ project with the aim of improving lossless jpeg compression and making the web a faster place. Forked from libjpeg-turbo, mozjpeg is more concerned with reducing filesize than doing it…
Read Article
To revoke the certificate, please run the following (if the cert is still in-place): cd /usr/local/directadmin/scripts ./letsencrypt.sh revoke `hostname -f` To stop the auto-renewal: rm -f…
Read Article
Exim and Dovecot do support multi-IP ssl certificates, but their setup can be a little bit tricky to try and maintain. With LetsEncrypt, we can setup multi-domain certificates for the hostname, and mail domains, all in…
Read Article
Cause Another service is listening to TCP port 8880 or 8443. Connect to the server via RDP Find the process ID from the service listening to ports 8880 or 8443: netstat -aon | findstr -i ":8880 :8443" | find "LISTENING"…
Read Article
In order to optimize PHP performance on Windows Server, the following steps can be performed: Using FastCGI - extension to the CGI protocol that provides high performance for all Internet applications without any of the…
Read Article
Unable to send an email using the STARTTLS authentication: 454 4.7.0 TLS not available due to local problem Cause TLS misconfiguration in Postfix: The postfix_default.pem certificate file does not contain the valid SSL…
Read Article
Type the following command: # camcontrol devlist How do I list current partition information? Use the following command: # gpart show Sample outputs: => 34 31277165 ada3 GPT (14G) 34 1024 1 bios-boot (512k) 1058 6…
Read ArticleWhen the issue requires hands-on administration, troubleshooting, security or migration work, our team can take it from the knowledge base to production.