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Still Using Old Linux Network Configs? Discover the Faster Way to Configure Networks in Linux
When I first started working with Red Hat Linux, network configuration was handled through files nestled in /etc/sysconfig/network-scripts.
These ifcfg files were the backbone of network configuration.
Fast forward to 2025, and our company is preparing to transition to RHEL 9.
In my research for the migration, I came across a significant change in how network configurations are managed.
What’s Changing?
In the new version of RHEL, NetworkManager is now the default tool for managing network settings, and it defaults to using the keyfile format for new connection profiles.
While the traditional ifcfg files are still supported, they are no longer the primary method for configuring network interfaces.
This shift is an important part of RHEL's evolution, and understanding it is crucial for our migration.
But what does this mean for you? Let’s dive into both formats — ifcfg and the keyfile format—so you can easily transition from one to the other.