key generate SSH

LOOK:
http://plog.longwin.com.tw/post/1/293

TruboleShoot: Reference http://bbs.chinaunix.net/thread-1942785-1-1.html

1。创建了用户abc
2.#su - abc
3.#mkdir .ssh
4.#chmod 700 .ssh
5.#ssh-keygen -t rsa
6.#cd .ssh
7.#cat ./id_rsa.pub >> authorized_keys
8.#chmod 644 ./authorized_keys