Ubuntu learning-how to further improve system security

I believe that everyone has suffered or often heard how many viruses and vulnerabilities occur in windows, but is linux really 100% secure? No. linux systems are also vulnerable to viruses and malicious attacks. However, compared with windows systems, such a virus is a rare problem. To make your Ubuntu system more secure, please refer to the following content: 1. Set a safe enough system password. What is safe enough? 1. It must be no less than 8 characters and 2 characters long. Do not include any personal information in the password, such as the date of birth. I believe that everyone has suffered or often heard how many viruses and vulnerabilities occur in the windows system. But is linux really 100% secure? No. linux systems are also vulnerable to viruses and malicious attacks. However, compared with windows systems, such a virus is a rare problem.

To make your Ubuntu system more secure, please refer to the following content:

1. Set a secure enough System Password
What is adequate security: 1. It must be no less than 8 characters and 2 characters long. Do not include any leaked personal data in the password, such as date of birth 3. Use as many symbols and numbers as possible, and make them case sensitive.

2. Use sudo and su commands with caution
These two commands represent the highest permission to use the system. Do not abuse them unless necessary. Perform the following operations after installing the Ubuntu system:

Sudo su

After entering the root permission, use the passwd command to set a password for the root user. If this is not done, Ubuntu does not have a password by default, anyone can directly access your file system from the recovery mode without a password, so remember this.

3. Do not run the script programs that others give you at will.
To download software from the Internet, try to use the software management program that comes with the system, and try to download the program with verification code from a professional linux website.

4. Unnecessary service programs should not be opened as much as possible
For individual users, do not open unnecessary service programs, such as apache, SQL, ftp, and telnet. Even if you want to use them, disable them after use, this improves both system performance and system security.

5. Pay more attention to system processes

6. Use the ubuntu system upgrade manager to download the latest software patch.