ssh根据域名使用不同key

cat ~/.ssh/config

# ponxu-osc
Host git.oschina.net
HostName git.oschina.net
User ponxu
IdentityFile /home/ponxu/my-qqmail-key

# ponxu-github
Host github.com
HostName github.com
User ponxu
IdentityFile /home/ponxu/my-gmail-key