SSH 配置

转自 http://blog.csdn.net/lpxuan151009/article/details/6558731

--设置ssh

root@hadoop1:/opt/hadoop/conf# ps -e |grep ssh
 1297 ?        00:00:00 ssh-agent
root@hadoop1:/opt/hadoop/conf# ssh localhost
ssh: connect to host localhost port 22: Connection refused

root@hadoop1:/opt/hadoop/conf# sudo apt-get install openssh-server
正在读取软件包列表... 完成
正在分析软件包的依赖关系树      
正在读取状态信息... 完成      
将会安装下列额外的软件包：
  ssh-import-id
建议安装的软件包：
  rssh molly-guard openssh-blacklist openssh-blacklist-extra
下列【新】软件包将被安装：
  openssh-server ssh-import-id
升级了 0 个软件包，新安装了 2 个软件包，要卸载 0 个软件包，有 171 个软件包未被升级。
需要下载 317 kB 的软件包。
解压缩后会消耗掉 913 kB 的额外空


root@hadoop1:/opt/hadoop/conf# sudo /etc/init.d/ssh start
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service ssh start

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the start(8) utility, e.g. start ssh
root@hadoop1:/opt/hadoop/conf# ps -e |grep ssh
 1297 ?        00:00:00 ssh-agent
 2548 ?        00:00:00 sshd

--设置ssh不需输入密码登录
root@hadoop1:/opt/hadoop/conf# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
c0:71:4e:38:4e:42:cb:cb:f2:32:52:16:6a:08:a7:66 root@hadoop1
The key's randomart image is:
+--[ RSA 2048]----+
|   .. ..o        |
|   ..o+=         |
|. o o+o..        |
|o+ o ...         |
|+E+ o   S        |
|+o o             |
|. o .            |
| . o             |
|                 |
+-----------------+


root@hadoop1:~/.ssh# cat id_rsa
-----BEGIN RSA PRIVATE KEY-----
MIIEowIBAAKCAQEArBID1Vnx4VsMZcnBzk/IXD33TInM1S38s8RhBVf6CeJLCjM8
34Uz/VM45BOHFbt3QNByHI4w7QaMzg0reOCiH3ndY9VfvnYtPjRcI2a2v0lRhW8n
wmy8vA1Mvugi5viIWiZMSwzPWxcj0faLyaptqIsSv3UFJdgw2dv78r9rKmT36kp8
+YKBY7us619vhC0rDa/cIQpTEJduCA/+fEUFdYzfVWCYAYnSij+PwFdVxUmaseL1
yXdPjvPB7mY0TsiARYBINgy198HNmtl6DPQU5JMPrkBBHCjUEmxaVlprdvJGTxAa
jDmT6ymGviDQz64CG1RsPGZZ4coT5vEzDcBOrQIDAQABAoIBAGWXxVekYWFyxmEa
vCi5hkyf8XDpM1zyZ+8jlTz4cpJ/X1rIYbp/BPEev8o5lVpJcuF7sMQXV9+6LExE
DlSyHEaFRyd4ha0ITTIa7AOi02chPNaRiGIMnWpSV+unV2QTfT3susLc71iS0v1W
mbYZv+DxK8KKrt1nRYB7l8f9KKLAPqEYIFzv07oFV/tXEgNZy7JKKTGfH1mzDn30
ucdWsau6Lxv2OAW7Ev01GSdGyP9PwL/seAFkNBRSFFZ32w6u1oqbM+1onxTzheoq
QsNGVhKMPAK/ILcbxgbAE1mVbqBMxlzX1i4Z0pEwJ5PaaZz1HgLSyMzrQ6oy1f2P
cOnzF8ECgYEA0obdPMbmLWHHZoDEKeUafhU/g9FpaMA3H9w08bGwK7cv5hRAZBIs
yxy48oygcV0vnfC9IHU9Qkc+92AkbTZ2sFLgahRM4cDWChd1g4YAgm5R7EjzMnsq
XJQ6cm6JGUQKwVoYfw06gaJeFBle7XDonogR3YOdEwKHL2T3XBe5XyUCgYEA0Tyx
DiWrIWIGXPxZr2HWHnYC/7ldFNzboGbSn3fJGN7tm33Fyd4P14NHWXA2LreRbrKV
oZRZCBOSLAGFFDUqhLAK6UhKZDi0CbYRZvnZ4T1UB6em7sBZxgIhe/lidjfba8Ce
uJthCXOwK+sZUNEC84AYQdiAwvBrgB0cqcp6/ukCgYB+m5avd1p0DmqxrVzLaTmu
e67P4n+G/JnqMi8w71BoaemHb8RtqjSADgz36TSQGJ+LV30V6QvnMRuf/5TIjUmB
rsXBZeX6mlLejM8iQtNJnXjtJc4EHOgT9xzTNsCCjlX9g+ZZeiYmUfRMGBnrp8xt
kp1T31P2W73a9diA7M+RdQKBgGbMEJjIvOjrxgCNImreAFp61EJbCXYkg+qsWbJr
IWuMquQHyNLCvLm/D6DLVnNhUJw4NPdrcMpdAyWHoaAp9re13cZ688GFcj6LKsWS
3w6gGNah8Yu/CNwVU+oavdsi2jR4MAK2o9gG9Hi/SnLAHVkQh9phyfD8OXR52Qk6
J29xAoGBALKMgnHdvyRLR8V2w0R9wwxyJtw51jAsS2TUMq0kvweNjE3lGO8zL3tu
xspIIC1VIxBt6BBZ/Hyc+jdvX+ExxZnd3z1piVBdwpN6iNxp6TDklAwL2LCoJBhU
KyxKkmeKAZ8Tr+M7jnmQDfkFYxU6vzPutmFI7Zi3qVP1bxFEZKXT
-----END RSA PRIVATE KEY-----


root@hadoop1:~/.ssh# cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
root@hadoop1:~/.ssh# cat authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCsEgPVWfHhWwxlycHOT8hcPfdMiczVLfyzxGEFV/oJ4ksKMzzfhTP9UzjkE4cVu3dA0HIcjjDtBozODSt44KIfed1j1V++di0+NFwjZra/SVGFbyfCbLy8DUy+6CLm+IhaJkxLDM9bFyPR9ovJqm2oixK/dQUl2DDZ2/vyv2sqZPfqSnz5goFju6zrX2+ELSsNr9whClMQl24ID/58RQV1jN9VYJgBidKKP4/AV1XFSZqx4vXJd0+O88HuZjROyIBFgEg2DLX3wc2a2XoM9BTkkw+uQEEcKNQSbFpWWmt28kZPEBqMOZPrKYa+INDPrgIbVGw8ZlnhyhPm8TMNwE6t root@hadoop1

--test
root@hadoop1:~/.ssh# ssh localhost
The authenticity of host 'localhost (127.0.0.1)' can't be established.
ECDSA key fingerprint is e8:0c:77:fc:b5:1a:76:46:e1:97:ec:e0:d2:ae:b1:cd.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
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