How To Operate All Your VPS From 1 VPS (Linux)

I have seen people having 5-10 VPS configuring them one by one. I hope for them this tutorial will be helpful. Before you start reading this tips make sure that this tutorial is all about Linux, if your a Windows user then I am sorry this is not for you.

The main reason why I created this thread is because I have 50 VPS and I find it too hard to open 1 VPS from Putty and configure it and open another VPS and configure it and it goes on for the rest 48 VPS.

So I decided to find a way where I can input one command from 1 VPS which will execute on the rest 50 VPS. And I finally found a way that works pretty awesome.

Requirement:

• More than 5-10 VP
• Putty software
• SSH connection
• Little knowledge about Linux

This post might by little hard for 1st time you try but 2nd time its gonna be easy. Well lets get started.

In this tutorial I will show you how do I operate 4 VPS with 1 VPS. You can have infinite number VPS connected to your main VPS. Your main VPS doesn't need extra RAM or STORAGE SPACE.

Creating SSH Key:

1. Download Putty and run it. Add your VPS IP and connect to your VPS though Putty. After that enter "username" and "password".
2. Now type on your main computer to generate a SSH key:

   ssh-keygen

3. Just press "Enter" button. This is an optional passphrase that can be used to encrypt the private key file on disk
4. Your will get some thing like this:

   Generating public/private rsa key pair.
   Enter file in which to save the key (/home/username/.ssh/id_rsa):

5. If you had previously generated an SSH key pair, you may see a prompt that looks like this:

   /home/username/.ssh/id_rsa already exists.
   Overwrite (y/n)?

   Be very careful when selecting yes, as this is a destructive process that cannot be reversed.
6. Once you have pressed "Enter" button you will see something like this:

   Your identification has been saved in /home/username/.ssh/id_rsa.
   Your public key has been saved in /home/username/.ssh/id_rsa.pub.
   The key fingerprint is:
   a9:49:2e:2a:5e:33:3e:a9:de:4e:77:11:58:b6:90:26 username@host_ip_2
   The key's randomart image is:
   +--[ RSA 2048]----+
   | ..o |
   | E o= . |
   | o. o |
   | .. |
   | ..S |
   | o o. |
   | =o.+. |
   |. =++.. |
   |o=++. |
   +-----------------+

Now have a public and private key that you can use to authenticate. The next step is to do the same step again from 1st-6th on rest of the 4 VPS.

Copying Public Key Using ssh-copy-id:

Once done now open your 1st VPS which is going to be the main VPS that is gonna control your 4 VPS. Now you have to copy your 4 VPS Public Key Using SSH-Copy-ID to your main VPS. It's simple don't panic.

For this method to work, you must already have password-based SSH access to your 4 VPS.

Type this command on your 1st VPS:

ssh-copy-id username@host_ip_vps2

You may see a message like this:

The authenticity of host 'host_ip_2 (host_ip_2)' can't be established.
ECDSA key fingerprint is fd:fd:d4:f9:77:fe:73:84:e1:55:00:ad:d6:6d:22:fe.
Are you sure you want to continue connecting (yes/no)? yes

Type "yes" and press ENTER to continue.
Next it will ask your "host_ip_2" password (Which means enter your 2nd VPS password):

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
username@host_ip_2's password:

Once done you will see output that looks like this:

Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'username@host_ip_2'"
and check to make sure that only the key(s) you wanted were added.

Now you can connect your VPS 2 from VPS 1. All you need to do now is just copy public key using ssh-copy-id for your rest of the VPS ( VPS 3, VPS 4, VPS 5 to your main VPS which is VPS 1).

Command to execute commands from 1st VPS (MAIN):

Your almost done! Now what you have to do is open your VPS 1 and then type this command:

for ip in host_ip_2 host_ip_3 host_ip_4 host_ip_5; do ssh root@$ip 'echo hello'; done

The above code will type "hello" in 4 of your VPS. So using this command your can update(apt-get update), upgrade(apt-get upgrade) and execute almost all the commands from 1 VPS.

To disable SSH timeout checkout: https://docs.oseems.com/general/application/ssh/disable-timeout

Sorry for bad English. I hope you enjoy this tutorial.