Be cautious in Linux VPS system.bash

Today I saw an article about the security issues of .bash_history files in Linux VPS which still need to be handled with caution. Because after any of our SSH command operations, a record will be left in the .bash_history file. If the file is leaked for some reason, the permissions of the website and VPS can be obtained. Therefore, I searched for relevant articles at night to solve and deal with the safe handling of .bash_history files.

First, the path to the .bash_history file

You can see a .bash_history file in the root directory of any Linux VPS host ROOT, which is used to record SSH tasks on the server. According to the literature, 500 commands will be recorded.

Theoretically, save as few commands as possible or clear the files after launching the VPS.

Second, how to clear the .bash_history file

A – Clear directly with command

cat /dev/null > ~/.bash_history && history -c && exit

You can execute the command to clear the file before exiting the VPS and clear the file to exit.

B – Reduce the number of saved items

Modify the HISTSIZE entry in the /etc/profile file. The default number is 1000. We can modify it to 5 or 10 or less, so that fewer records will be saved.

Then in the \\"/etc/skel/.bash_logout\\" file, add a line \\"rm -f $HOME/.bash_history\\" so that the file will be cleared after the user logs out of the VPS.

The above is about the information that was found and compiled after recording the content in the .bash_history file. If any friends see it, they can add it accordingly.

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