????Linux???????????????????????????Telnet?????????????????????????????????е??????Telnet??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Telnet?????????????????????????????Telnet???????????в????????????????????????繃??????????????????????Internet?????????????

????SSH??Secure Shell??????????????????????????????????????????????????????????????????????????????????????????????????OpenSSH?????檔??????????д??????????м????????“?м???”??????????????????????SSH??????????????л????????????????????????????????????????SSH??????á???????????????Telnet????????????????

????SSH?Telnet???????????/??????????????????????ж????????????汾???????1.x??2.x????OpenSSH 2.x?????1.x??2.x??

???????潫??RHEL 5???????SSH????????????е?????

??????RHEL 5???????????????????????SSH???????????????????????????????????

?????????????У??????????football.example.zqin?????SSH???????golf.example.zqin???????????ù??????????????SSH?г????????

????ssh [user@]hostname [command]

?????????????????????

?????? [user@]???????????????????粻?????????root????????

?????? [command]???????????????е?????

????scp [user@]host:/path [-rpC]

?????????ssh????????????????臨??

??????-r?????

?????? -p?????????????

?????? -C???????????????

????rsync srcfile host:/path

??????????????????????????????????????????????????????У?????crontab????????????srcfile??host:/path??

??????????SSH?????

????1?????ssh?????????????????δ?????????????????root??

????2?????????????????????????????OpenSSH??????ü????????????????????????yes??OpenSSH??????????????????~/.ssh/know_hosts????У????????????????????檔

????3?????????????root??????

????4?????????????????????????????????????????????????У??????exit?????????

???????????OpenSSH??Bug?????????????????????????????????????????????????????????~/.ssh??????????????????