SSH Enable Without Password Authentication On Ubuntu 14.04/16.045 min read
SSH means secure shell network protocol system. SSH system default connection port 22. If you can change to another using port for security purposes. So I have to show SSH enable without password authentication. It’s very important think if you can mysql DB replication then must be ssh enable without password authentication.
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Requirements :
- ssh must enable
- any firewall disable
- Hosts file localhost comment out
#127.0.0.1 localhost 10.66.50.1 SSH-1
Server -1 configuration for enable ssh without password authentication
root@SSH-1:~# mkdir .ssh
Goto .ssh/ directory
root@SSH-1:~# cd .ssh/
Run command ssh-keygen
root@SSH-1:~/.ssh# ssh-keygen
Press Enter four times. See as like below image
root@SSH-1:~/.ssh# cat id_rsa.pub
See example below
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC02n91bcmnAsiNuHgOvMdlxmh2 OIwq9jJriiEv3B1TJhsTvcRfYVB6aldxEpW8V9NdBVXzt9BsA/xHb6Znz04pdFrZ 8m17osc7pqV7Diu3lM/GZfK80F64ttpA152M0ztLb6i+b4EBfC4DkJkB6ONccGIa W8Jyj6f+Pzhd2E3pLQIDAQAB root@SSH-1
Then collect all text for add another server. Goto Server 2 and create authorized_keys file and then insert all authorized_keys from Server 1.
Now create full permission .ssh directory and authorized_keys file.
root@SSH-1:~# chmod 755 .ssh
Setup permission authorized_keys file.
root@SSH-1:~/.ssh# chmod 755 authorized_keys
Service ssh restart command or your server reboot needed.
root@SSH-2:~# service ssh restart
Server -2 configuration for enable ssh without password authentication
root@SSH-2:~# mkdir .ssh
Goto .ssh/ folder
root@SSH-2:~# cd .ssh/
Run ssh-keygen command
root@SSH-2:~/.ssh# ssh-keygen
Press Enter four times. See as like below image.
root@SSH-2:~/.ssh# cat id_rsa.pub
See example below:
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDO2DJevIWe2tKnlK8ffJaPcuQn 48Ydhm8GlXP8Rdb2GleX32ib7aJo/tc35+yUqGkkJ7edzRAThnnC88q4KXTTPIYQ gzFyQ8DICOiFmbAtIK8yT8OlLkC8ZzROFyeh3mwfS1UxsSi5Sba/8e76nzGQ45nn 1eYnk+diWM8I46U84QIDAQAB root@SSH-2
Then collect all text for add another server. Goto Server 1 and create authorized_keys file and then insert all authorized_keys from Server 2.
Now create full permission .ssh directory and authorized_keys file.
root@SSH-2:~# chmod 755 .ssh
Setup permission authorized_keys file.
root@SSH-2:~/.ssh# chmod 755 authorized_keys
ssh service restart or server reboot needed.
root@SSH-2:~# service ssh restart
Test from Server -2
root@SSH-2:~# ssh -l root 10.66.50.1
Write Yes then press Enter. Now login Server -1 from Server -2 without password authentication.
Goto Server -1 for test.
root@SSH-1:~# ssh -l root 10.66.50.2
Write Yes then press Enter. Now login Server -2 from Server -1 without password authentication.
Now ready for main task mysql DB replication.
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