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This article focuses on "how to prevent hackers under the Linux operating system". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to prevent hackers under the Linux operating system.

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.

At this point, I believe you have a deeper understanding of "how to prevent hackers under the Linux operating system". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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