Password less SSH login to another server can be very useful when
you want to configure a remote backup server or when migrating servers.
For enabling this you need to have openSSH installed on the server.
Here is a tutorial on how to configure password less SSH login to
server ‘mars’ from server ‘earth’
1. Login to earth as root.
2. Run the command
ssh-keygen -t rsa
If the key already exists you can either go to step 3 or you can
generate a new key by overwriting existing key (see image). It would be
better to overwrite the existing key if you did not generate it.
3. Change directory to /root/.ssh/
root@earth:~# cd /root/.ssh/
root@earth:~/.ssh#
4. Copy the contents of the file id_rsa.pub to the directory /root/.ssh/authorized_keys
scp -P
id_rsa.pub root@mars_server_IP:/root/.ssh/authorized_keys
5. You will be able to login to the remote server ‘mars’ by typing ssh root@mars_server_IP -p
without password nowRead more..
This is a simple article to setup a DNS Server in
Ubuntu. Please follow the steps to make this. Setting up DNS Server is
used to serve the new domain names using your IP. This is kind of providing
webhosting.
Creating your own OS can be quite a daunting task that requires a lot
of computer knowledge. I found a site that may interest you, Custom
NimbleX2 is an open-source project that allows even novices in
computing to create their own Linux OS.
a 
