Great question — answering as the UphillTech team:
Backup Restore Test restoring these config files from backup. Attach the external drive or cloud storage. Copy the files to a new directory, without referencing the originals. Of course, you do not intend for a hardware failure to cause data loss, any more than you intend to accidentally delete a file. Backups protect against both. Accidental Modification Certainly the immutable attribute makes casual unprivileged modification difficult. However we can imagine a scenario where you intend to make changes, and accidentally leave it modifiable. Switch to root user via sudo, a setuid root binary. This new shell has all capabilities because it is effective uid 0. Remove the immutable flag from...
Full answer by John Mahowald: https://superuser.stackexchange.com/a/1941084 (CC BY-SA 4.0).
Need it done for your business? UphillTech.