Five Ways to Improve Linux System Security

With the widespread use of the Linux operating system, the security problems faced by the system have also followed. More and more users' Linux servers are being invaded by viruses, hackers, etc., resulting in data. Lost and other issues. So, how do we improve the security of the Linux system? The following small series lends you to the five ways to improve the security of Linux systems.

1. Select Full Disk Encryption (FDE)

Regardless of the operating system used, we recommend that you encrypt the entire hard drive.

If you are lost or stolen from a hungry laptop, using a simple login password does not protect your data. A thief can use the USB key to directly access your Linux system to steal data. No password is required.

By encrypting your hard drive, you can keep your data safe, because thieves can't read anything without an FDE password.

Knowledge of FDE encryption Your home folder, you don't have to worry about temporary files, swap files or files in other directories, you are accessed without your knowledge.

In Ubuntu and Fedora and many Linux distributions, all-ceramic disk encryption is used at the time of installation. You can choose whether to start it during the installation.

Of course, remember to choose a correct password!

2. keep up with software updates

Similarly, no matter what Caozuoxitong you use, you should keep the application Caozuoxitong in, such as a Web browser, PDF reader Software such as video players is the latest.

Most Linux distribution implementations are very easy.

On Ubuntu, updates are automatically installed by default.

Pinch can check the system settings ——software update——update.

You have to make sure that important security update options are turned on.

3. Learn to use Linux firewall

Linux kernel includes a firewall component, called iptables, it gives you a powerful way to manage network traffic, and a lot of variety to keep each Kind of cyber attack.

On Ubuntu you will also have a utility called Simple Firewall (UFW), which simplifies the setup of iptables.

By default UFW is disabled, but you can do it by opening it at the command prompt:

To learn more about iptables and what it can do, you might try a graphic Configuration tools such as GUFW or UFW front ends.

On Fedora, you'll find FirewallD, which is the default firewall management tool FirewallD enabled by default, called firewall configuration; you can install it from a command prompt:

4. Tighten Secure Browser

Many free extensions can improve your browser, but this also brings security privacy issues, whether you use Mozilla Firefox, Google Chrome or other browsers.

5. Using anti-virus software

The reason for this is because this method has a lot of controversy.

Some people will tell you that security antivirus is not meaningful in the Linux operating system. In fact, this is a very wrong concept.

Why not? If you infect another file through an infected file, then if you have anti-virus software, you can protect your system from being attacked. Reduce the risk of being attacked.

The above are the five ways to improve the security of Linux systems. As long as we pay more attention and use according to the methods described above, we can improve the security of the system and prevent it from happening.