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This article will explain in detail what practical skills to prevent hackers under the Linux operating system. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Linux is a multi-user system, once someone gets your root user, he can do whatever he wants on your system, because a single user has complete control over the system, if the operation is improper or is entered by others, then the consequences will be unimaginable, how to prevent the entry of a single user, there are the following aspects of attention.

1. Protect the / etc/inittab file. If you change 3 in id:3:initdefault to 1, you can directly enter the single-user mode every time you start. For the / etc/inittab file, enter as root and set the attribute to be unmodifiable by other users via chown 700s / etc/inittab.

2. If you use lilo to boot, you may use linuxconf or directly modify lilo.conf to set the waiting time for input when booting to 0 or the shortest time line. In this case, if you enter single-user mode, you can boot with a floppy disk.

3. If you boot in GRUB mode, the easiest way is to use the GRUB password to protect the startup options.

4. In order to prevent others from sabotaging remotely and restart the system, in addition to effectively managing the password of ROOT and the files under / etc directory, we should also set the password of CMOS, so that even if the system is changed to single-user mode, it is impossible to start the computer directly.

In this way, you will learn some practical skills to prevent hackers under the Linux operating system and surf the Internet better.

This is the end of this article on "what are the practical skills to prevent hackers under the Linux operating system". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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