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Systemd: Hidden Gems for a Better Linux
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this post was submitted on 10 Aug 2023
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Finally a systemd praise post after so many hateful remarks. I knew systemd could do dns resolving but just learned it could handle the entire network stack and replace NetworkManager. I have a question: How can services such as Apache adapt to both NM and systemd at the same time? NM and systemd have different wait-online services. You can also add systemd-analyze for boot time analysis to the list.
If you look at the systemd unit for Apache you'll just find
After=network.target- it doesn't wait-online at all. Apache doesn't really care if you're using NM or systemd-networkd, it simply queries the system (like theipcommand does) to know what's going on with the network. It was designed as recommended for moderns programs: it is aware that your network might change and listens for the appropriate signals and takes care of the binds dynamically.It depends on your use case. I have three machines and use NetworkManager on one of them and systemd-networkd on the others. The latter is great for static configurations, but for a notebook that roams WiFi networks, it doesn't make the most sense.