If you are interested in learning, Request you to go through the below recommended tutorial.
DevOps Full Course Tutorial for Beginners - DevOps Free Training Online
Docker Full Course Tutorial for Beginners - Docker Free Training Online
Kubernetes Full Course Tutorial for Beginners - Kubernetes Free Training Online
Ansible Full Course Tutorial for Beginners - Ansible Free Training Online
Openstack Full Course Tutorial for Beginners - Openstack Free Training Online
How to Check Port is Open on Remote Server
Use the command "telnet" as below to see the port 25 is open.
#telnet 192.168.2.1 25
We should get connected to the remote server as connection established. And also you can use the command "nmap" to ensure the port open or not on remote server as well.
We should see the port 25 in the output, then the port is open.
If both the command doesnt show the output as expected, then its been blocked by firewall or the service belongs to port 25 (SMTP) is not running.
Related Content on Linux might be useful to you to improve your Linux Skills.
How to Access Linux Server from Windows Remotely
Configure SSH Passwordless Login Authentication (SSH-keygen)
How to Create LVM Partition in Linux – LVM Tutorial
Install & Configure Samba Server on Linux (RHEL7 / CentOS7)
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