Linux › Section G · System configuration › Topic G.2
The structure of /etc
Almost everything that makes one Linux machine behave differently from another is a text file under /etc. Knowing how that directory is organised, and which edits are safe, lets you change a system without breaking it.
In this topic
- What /etc is for
- Files you meet first
- The .d directory pattern
- Vendor defaults versus local overrides
- Identity: hostnamectl and localectl
- Worked example: where does the change go?
- Symlinks and generated files
- Worked example: a safe edit of sshd_config
- Permissions and package upgrades
- Common mistakes to avoid
- Key takeaways
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