ssh without password

just a note
I want to write a scrpit to achieve the "ssh no password" function in nutanix cluster
first look at the "ssh no password" part
script.. maybe one day will write..just maybe

for windows client to linux server ssh without password is easy
simply speaking
create private key and public key from windows
save the windows public key in linux server
and load private key file while you ssh to linux server

this is setting step


lab environment
linux server: 10.31.1.70
windows client: 10.31.1.68

need tool:
PuTTY
PuTTYgen
we can download from
https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html



windows
1. start puttygen-> generate

2. copy public key code to txt

3. save private key file

linux
1. verify ssh config /etc/ssh/sshd_config
sudo vi /etc/ssh/sshd_config
PubkeyAuthentication yes
AuthorizedKeysFile      .ssh/authorized_keys

check file path and PubkeyAuthentication should be yes

2. create file vi ~/.ssh/authorized_keys
post windows public key code and save

3. change file permission
chmod 700 ~/.ssh/authorized_keys

4. change folder permission
chmod 600 ~/.ssh

5. restart ssh servier
sudo service sshd restart

windows connection
1. open putty
->connection->SSH->Auth load windows private key file

2. session -> connect to linux server
if success,keyin user name and access linux server without keyin password

Reference article:
別讓 MIS 不開心，免密碼直接登入遠端的 SSH Server
http://blog.itist.tw/2015/03/login-ssh-server-without-username-and-password.html