i have vps ubuntu 18.4 from contabo.com . how install microtik on vps .and does when i installed microtik CHR on vps i can use server vps to other job for example install wordpress and other application.
thank you
You can install RouterOS CHR installation in your Ubuntu. You need some kind of Virtual Machine software in your Ubuntu. Some examples are here:
https://wiki.mikrotik.com/wiki/Manual:CHR#Steps_to_install_CHR
Hello.
As I can see the operation of QoS in a virtual network made with GNS3, Video, VoIP and Data Vlan are used. The problem is the following I am using GNS3 software which allows me to emulate the image of the mikrotik CHR, I use 1. router with the CHR image of the Mikrotik 2 switch, a trunk mode and access mode is used for both switches. The Vlans are working fine, but I don’t know how to test QoS on these Vlans, I was thinking about virtualizing on different machines.
Please, if you could help me, thank you!
This is a defunct thread but since this shows up when searching in google for instructions to install mikrotik on contabo here is the information
You can use a variation of the installation instructions https://wiki.mikrotik.com/wiki/Manual:CHR_Hetzner
You go into contabo panel, run recovery on the vps you want to use, chose debian as your recovery
Connect to it and do this command
curl -L https://download.mikrotik.com/routeros/7.7/chr-7.7.img.zip | funzip | dd of=/dev/sda bs=1M
Once it finishes you can reboot the vps and it will resize the parition on boot and start the CHR instance
That is all! 
Even easier on DO: https://youtu.be/ZjQL9z79Dy0
Never ever assign a public ip to a new unprotected firewall/router in a cloud service, especially for software like CHR that has a well known admin user without password. I’m kind of surprised that a security-related company like Mikrotik would publicly provide this type of inappropriate advice. That is just very bad practice!
In case of DigitalOcean, disable the public ip on the droplet and use a jump server to protect the newly installed router until it’s fully configured and tested.