# Access server without password
- When setting is finished, you don't need to type password to login.
- need private, public keys

## Generate keys
- In client computer, open terminal(git bash in windows)
- `ssh-keygen -t rsa`
- all enters
- `cd ~/.ssh`
- **id_rsa** : private key
- **id_rsa.pub** : public key
- find **id_rsa.pub** file. This is public key.
- `cat ~/.ssh/id_rsa.pub`
- copy it

### Server login
- log in server with password just once.
- create file ~/.ssh/authorized_keys in server
```
mkdir ~/.ssh
vi ~/.ssh/authorized_keys
```
- paste copied client's public key

### GitHub login
- You can use **git:** protocol, not **https:**
- in GitHub open git settings in browser
  - https://github.com/settings/keys
- click New SSH key button
- input computer name and paste key in the below box

## Check point
- permission matters.
- `chmod 700 ~/.ssh`
- `chmod 644 ~/.ssh/authorized_keys`

## Optional
- In windows, install **git** from http://git-scm.com and use `git bash` terminal