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CentOS 7 Linux Server Cookbook - Second Edition by Jonathan Hobson, Oliver Pelz

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Troubleshooting the system in rescue mode

We all make mistakes and this is especially true for novice Linux system administrators. Linux can have a steep learning curve and sooner or later there will be a point in your career where your CentOS installation does not start up due to broad number of reasons, including hardware problems or human mistakes such as configuration errors. If this has happened to you then you can use the CentOS rescue mode in order to boot an otherwise unbootable system and try to undo your mistakes or find out the root of the problems. In this recipe, we will show you three common use cases when to use this option:

  • Accessing the filesystem for recovering important data or undoing changes to configuration files if CentOS ...

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