Introduction
In this guide, we will learn how to find out if a remote system is still alive, if certain services are running, and which processes are running on the remote system.
Prerequisites
Before proceeding, ensure you have:
- A remote system with network connectivity
- Access to command-line tools
Checking Remote System Status
- Ping: Use the
pingcommand to check if the remote system is reachable:ping -c 4 <remote_system_ip> - Nmap: Use the
nmapcommand to discover hosts and services on a network:nmap <remote_system_ip>
Checking Service Status
- Telnet: Use
telnetto check if a specific service is running on a remote system. For example, to check if SSH service is running:telnet <remote_system_ip> 22 - Netcat (nc): Use
ncto check if a port is open on a remote system. For example, to check if port 80 is open:nc -zv <remote_system_ip> 80
Checking Running Processes
- SSH: Use SSH to remotely login to a system and check running processes:
ssh <remote_system_ip> ps aux
Conclusion
Congratulations! You have learned how to check the status of a remote system, including its services and running processes, using command-line tools on Linux.
