There are several ways to check if a Linux server is overloaded. Here are some common methods:

Check CPU usage: Use the ‘top’ or ‘htop’ command to check the CPU usage of the system. If the CPU usage is consistently high (above 80%), it could indicate an overloaded server.

Check memory usage: Use the ‘free’ or ‘vmstat’ command to check the memory usage of the system. If the system is using all of its available memory, it could indicate an overloaded server.

Check disk usage: Use the ‘df’ command to check the disk usage of the system. If the disk usage is consistently high (above 80%), it could indicate an overloaded server.

Check network usage: Use the ‘iftop’ command to check the network usage of the system. If the network usage is consistently high (above 80%), it could indicate an overloaded server.

Check system logs: Check the system logs for any error messages or warnings that could indicate an overloaded server. Use the ‘tail’ command to view the last few lines of the logs.

Check running processes: Use the ‘ps’ command to check the running processes on the system. If there are a large number of processes running, it could indicate an overloaded server.

Once you have identified the source of the overload, you can take steps to address it, such as optimizing your application or upgrading your server hardware.