How to check the system in Linux?

To view information about the Linux system, you can use the following command:

1. What is the output of the command “uname -a”?
2. Show all information about the operating system.
3. Display the content of the file “/etc/issue”
4. Display the contents of the file “os-release” located in the directory “/etc”
5. Show me the version information of the operating system.

These commands can be directly executed in the terminal to display the corresponding system information.