How can I check open ports in Linux?

There are several methods available in the Linux system to view open ports.

1. You can use the netstat command to list all ports that are currently in a listening state on the system.
2. Show me all the listening ports on my system.
3. This command will display information such as port number, protocol type, listen address, and status.
4. Using the ss command: ss command is a replacement tool for netstat, you can use the following command to view all ports in listening state:
5. List all TCP sessions with listening and non-listening sockets.
6. This command will display information such as port number, protocol type, listening address, and status.
7. To use the lsof command, you can view the files and processes that are open on the system. You can use the following command to see the ports that are currently being listened on:
8. List all open network connections that are in the LISTEN state.
9. This command will display all the listening ports and their associated process information.
10. Use the nmap command: nmap is a network scanning tool that can be used to scan open ports on a target host. You can use the following command to scan the open ports of a specified host:
11. Scan the IP address of the host using nmap.
12. This command will scan all ports on the specified host and show which ports are open.

These are several commonly used methods, you can choose one according to your needs to view the open ports.