How can I check the connection status in Linux?

In Linux systems, you can use the netstat command to view connection status. Here are some common netstat command options:

1. View the network connections for all activities.

netstat -a

1. View all TCP connections.

netstat -at

1. View all UDP connections.

netstat -au

1. Viewing TCP connections that are listening.

netstat -l

1. Viewing active UDP connections.

netstat -lu

1. View the programs and process IDs of network connections.

netstat -p

1. Check the detailed information of the network connections, including the process ID and process name.

netstat -ap

The command above will display all relevant information such as connection status, local address and port, remote address and port.