ssh 免密码登录，脚本

ssh 免密码登录，脚本

ssh 免密码登录，需要使用公私钥来认证@import url(http://www.blogjava.net/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

首先通过 ssh-keygen 生成一对公私钥，默认在 ~/.ssh/id_rsa.pub 和 ~/.ssh/id_rsa，前面的是公钥。

认证就是要把这个文件加到远程用户目录 ~/.ssh/authorized_keys 文件中，而且这个文件的权限不能被其它人访问。

下面的脚本能够自动把这个文件放到远程，方法是 ./addpk ip username password

#!//usr/bin/expect

set host [lrange $argv 0 0]

set user [lrange $argv 1 1]

set passwd [lrange $argv 2 2]

proc ssh {cmd} {

    global user host passwd

    spawn ssh $user@$host "$cmd"

    expect {

        "*conne*" {

            send "yes\n"

            expect "*password*"

            send "$passwd\n"

            expect eof

        }

        "*password*" {

            send "$passwd\n"

            expect eof

    }

    }

}

proc scp {src dest} {

    global user host passwd

    spawn scp $src $user@$host:$dest

    expect {

        "*conne*" {

            send "yes\n"

            expect "*password*"

            send "$passwd\n"

            expect eof

        }

        "*password*" {

            send "$passwd\n"

            expect eof

        }

    }

}

ssh "mkdir -p ~/.ssh"

scp "/home/user1/.ssh/id_rsa.pub" "~/.ssh/id_rsa.pub"

ssh "cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys"

ssh "uniq ~/.ssh/authorized_keys > ~/.ssh/authorized_keys.tmp"

ssh "mv ~/.ssh/authorized_keys.tmp ~/.ssh/authorized_keys"

ssh "chmod 700 ~/.ssh"

ssh "chmod 600 ~/.ssh/*"