AI writes Linux commands fast and almost always well, but “almost always” is not much when the command deletes files. The rule is simple: ask for an explanation of each part, try it somewhere that is not the server that matters, start with commands that only read, and have a backup ready before anything that changes things. On an unmanaged VPS there is nobody to undo a mistake for you.
The method, step by step
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Tell it what you have. The system version (cat /etc/os-release), what you want to do and what you have tried. Commands from one distribution may not exist on another.
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Ask for the explanation, part by part. “Explain each option in this command and tell me what happens if I get it wrong.” If you do not understand a part, do not run it.
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Check the manual. See the options with man command or command --help. The AI makes up options that do not exist.
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Start by only reading. Commands such as ls, cat, df -h and free -h change nothing. See the state before you change it.
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Back up before changing. A VPS snapshot, or a copy of the file you are about to edit. See backing up a VPS.
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Try it on a test server when you can, and run one command at a time, looking at each result.
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The patterns that do damage
| Pattern |
Why it is dangerous |
What to do |
rm -rf with a path or variable |
If the path comes out empty or wrong, it deletes what it should not |
List what it will delete with ls first |
chmod -R 777 |
Gives everybody full permission and opens the door to attacks |
Ask for the right permission and explain the case |
curl ... | bash |
Runs a script from the internet without you reading it |
Download it, read it and only then run it |
| Firewall rules copied blindly |
Can lock you out of your own server |
Try with a spare SSH session open. See losing SSH access. |
| Editing the SSH configuration |
One mistake cuts your access |
Keep a session open while you test the new one |
Commands with sudo by habit |
Gives the mistake the power of root |
Use the normal user whenever you can |
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Do not paste passwords, keys or configuration files holding secrets into the chat with the AI. Remove them from the text before pasting. See keeping keys safe.
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A prompt that works well:
I have a VPS running [system and version]. I want to [goal].
Give me the commands one at a time and explain every option.
Say what each command changes and how to undo it.
Start with the ones that only read. Warn me about anything irreversible.
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If the AI gives you a long, complicated command, ask for a simpler version or one in steps. A command you cannot explain to someone else is a command you should not run.
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