For VPS services, VEDOS is only responsible for the operation of the virtual machine itself and its connectivity. The management of the operating system and other software is entirely in the customer's control, we do not perform any installations, modifications or other interventions.
In this article you will learn:
- What are the most common problems you will encounter with VPS
- How to check the functionality of VPS
- How to restart VPS
- How to scan server resources in Linux
- How to deal with server hacking
- Frequently Asked Questions
Common VPS problems
Common VPS problems include the unavailability of the server as a whole or some applications.
If the server does not respond at all, even to a ping or an SSH connection attempt, check the functionality of the VPS and restart it if necessary.
Unavailability of a key application can still cause issues with web view or SSH availability. Check the application status, logs, and server resources. If SSH is not working, connect via KVM.
VPS functionality check
If the server is down for some unknown reason, the first thing to do is to check the functionality of the service itself.The first place to check is the Status ⧉ page, where you will find information about current outages. You can find information about planned outages in the customer administration ⧉ and in your email.
If there is no outage or downtime, enter the following steps to administer the service itself:
- Log in to the customer administration ⧉.
- In the top menu, select Serverhosting VPS SSD, or VPS ON.
- In the overview, select the service you want to check.
First, in the Information table, verify that the Service Status is active. If it is not active, the service is expired and therefore disabled.
If the service is active, check further that it is running and connected to the network.
- For VPS HDD/SSD, check directly in the administration. In the left menu, click on Status and VPS information. Verify that Status is running and Network connected.
- For VPS ON, log into the OpenNebula Sunstone interface ⧉. In Virtual Machine Administration, verify that the status is CLOSED and the graphs on the Network tab show activity.
If IP addresses are removed from the Network tab of the VPS ON, the VPS is disconnected from the network from our side.
The network may also be unavailable because of a server configuration error. Connect via KVM and verify the network configuration with the command ip a (Debian, Ubuntu), or ipconfig.
Restart VPS
A reboot can solve a large number of problems, including system resource increase and kernel panic - crashing the operating system in an abnormal situation. Follow the instructions:
If the server fails to start at all, if you have a backup (your own or ours), restore the server from the backup or reinstall it and upload the data.
Verifying server resources in Linux
Lack of system resources can result in server slowdown, freezing or crashing of individual services or the entire operating system.
Connect to the server via SSH or VNC (KVM).
VNC (KVM) works even when SSH is unavailable and the server is disconnected from the network.
- Connect to the VPS HDD/SSD according to the VPS - Accessing the server via VNC instructions.
- Connect to the VPS ON in the ON Sunstone interface ⧉. After selecting the virtual machine, click the display icon in the control panel .
Run the commands:
ps,topahtopto check RAM and CPU. If you run into limits, consider limiting some processes or increasing the VPS HDD/SSD or VPS ON. Note that the VPS variant can only be increased in the administration, not decreased.dfadf -hto check the disk and the number of files. Large volumes and file counts can cause problems. Clean the disk space continuously.
Avoid solving the memory problem by activating swap. Accessing data on disk is significantly slower and the server slows down even more.
If checking the server resources or resolving resource exhaustion did not help, review the system and application logs (usually in the /var/log directory).
Server attack
Servers are most often attacked for spamming and botnet attacks.
Outdated applications (for example, old, unupdated versions of PHP) and various content management systems are commonly attacked. You can detect the problem by thoroughly checking the running processes using the command ps aux.
From our side, we usually solve the attack by informing the server subscriber by e-mail, in case of a larger attack by SMS. In cases of very serious attacks, or if the subscriber does not respond, we disconnect the server from the network in an effort to minimize damage until the service administrator fixes the problem.
A server disconnected from the network is not accessible via SSH, but you can connect via VNC (KVM).
To report the resolution of a server hacking problem, reply to the original message from the technician or write via the &boxboxbox; form. Include the service name or number and a description of the solution.
Frequently Asked Questions
I can't connect via SSH, what should I do?
Connect using VNC (KVM) as per the instructions for the VPS SSD/HDD, or in the ON Sunstone &boxboxbox; interface.
I don't remember the root password to log into the operating system, how do I log in?
If you are using a pre-installed operating system, you can use the form &boxboxbox; to request a resend of the service setup email (VPS HDD/SSD), or change the root password to ON Sunstone ⧉ following these instructions (VPS ON). If you have your own OS, or if you changed the root password of the VPS HDD/SSD service after setting it up, unfortunately we cannot provide you with it.