linux

Configure OpenDKIM with Postfix on Debian

What are opendkim signing criteria? And how Configure OpenDKIM with Postfix on Debian? Our goal is configure OpenDKIM to sign emails for multiple domains.

Linux Debian Security Networking

Linux TCP keepalive

TCP keepalive settings play a crucial role in network performance and resource management. By following the best practices and adjusting the settings to suit your specific needs, you can optimize your system’s ability to detect and clean up stale network connections while maintaining optimal performance.

Networking Linux

How To Find Out Hard Disk Specs / Details on Linux

Linux comes with various commands to find out information about your hard drive. I recommend hdparm command, which provides a command-line interface to various hard disk ioctls supported by the stock Linux ATA/IDE device driver subsystem. This command reads/request identification information such as disk size, description, and much more directly from the drive, which is displayed in a new expanded format. Let us see various Linux disk info commands to print hard disk drive details on screen.

Linux Linux Utilities

Enable Rsyslog Logging on Debian

This step by step tutorial will take you through how to enable rsyslog logging on Debian 12. Debian 12 bookworm uses systemd-journald logging by default. As such, it has deprecated the use of Rsyslog for logging so as to prevent the log messages being written twice on disk. So, how can you enable rsyslog logging on Debian 12 and higher?

Rsyslog vs Journald

Rsyslog and Systemd-journald are both logging systems commonly used in Linux distributions for collecting and storing log data. However, they have different features, functionalities, and configurations.

Debian