* 测试环境：Red Hat Enterprise Linux Server release 6.6 (Santiago)

1、创建密钥

[root@localhost ~]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/alei/.ssh/id_rsa):
Created directory '/home/alei/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/alei/.ssh/id_rsa.
Your public key has been saved in /home/alei/.ssh/id_rsa.pub.
The key fingerprint is:
e2:82:86:66:71:58:f1:2c:68:a0:aa:b6:ea:a2:02:a5 alei@localhost.localdomain
The key's randomart image is:
+--[ RSA 2048]----+
|. . |
|o . + |
|.o o o |
|o + . |
|.= . . S |
|E.o. . . |
|++o . . |
|*.. . |
|Oo |
+-----------------+

2、安装Expect工具

A:搜索expect工具

              [alei@localhost ~]$ yum search expect
              ....
              pexpect.noarch : Pure Python Expect-like module
              expect.x86_64 : A program-script interaction and testing utility
              expect-devel.i686 : A program-script interaction and testing utility
              expect-devel.x86_64 : A program-script interaction and testing utility
              expectk.x86_64 : A program-script interaction and testing utility
              ....

B:安装expect工具
[alei@localhost ~]# yum install expect.x86_64 -y

              ...
              Resolving Dependencies
              --> Running transaction check
              ---> Package expect.x86_64 0:5.45-14.el7_1 will be installed
              --> Finished Dependency Resolution
              ...
              Running transaction
                Installing : expect-5.45-14.el7_1.x86_64                                  1/1
                Verifying : expect-5.45-14.el7_1.x86_64                                  1/1
              Installed:
                expect.x86_64 0:5.45-14.el7_1
              Complete!

3、开发交互脚本

[alei@localhost ~]# vim run.exp

#!/usr/bin/expect

              set username [lindex $argv 0]
              set userpwd [lindex $argv 1]
              set serverip [lindex $argv 2]
              set timeout 30
              spawn ssh-copy-id -i /home/alei/.ssh/id_rsa.pub $username@$serverip
              expect {
                      timeout exit
                      yes/no {send "yes\r";exp_continue}
                      password {send "$userpwd\r"}
              }
              interact

4、开发执行脚本

[alei@localhost ~]# vim run.sh
#!/bin/sh
if [ -z $* ];then
echo "Usage: $0 <ipfile>"
exit
fi
ipspath="$1"
username="alei"
userpwd="alei"
successfile="./success"
failedfile="./failed"
rm -rf $successfile
rm -rf $failedfile
for ip in $(cat $ipspath)
do
echo "<<<<<<<<<<<<<<<<<<<<<<<<<$ip<<<<<<<<<<<<<<<<<<<<"
./run.exp $username $userpwd $ip
if [ $? -eq 0 ];then
echo $ip >> $successfile
else
echo $ip >> $failedfile
fi
done

5、准备要设置无密登录的服务器

              [alei@localhost ~]# vim ips_list
              192.168.0.10
              192.168.0.11
              192.168.0.12
              192.168.0.13
              192.168.0.14
              192.168.0.15
              192.168.0.16

6、开始设置无密登录

[alei@localhost ~]$ sh run.sh ips_list

<<<<<<<<<<<<<<<<<<<<<<<<<192.168.0.10<<<<<<<<<<<<<<<<<<<<

spawn ssh-copy-id -i /home/alei/.ssh/id_rsa.pub alei@192.168.0.10

alei@192.168.0.10's password:

Now try logging into the machine, with "ssh 'alei@192.168.0.10'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

<<<<<<<<<<<<<<<<<<<<<<<<<192.168.0.11<<<<<<<<<<<<<<<<<<<<

spawn ssh-copy-id -i /home/alei/.ssh/id_rsa.pub alei@192.168.0.11

alei@192.168.0.11's password:

Now try logging into the machine, with "ssh 'alei@192.168.0.11'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

7、注意事项

A：如果执行脚本时发生以下错误，检查run.exp文件的执行权限（alei@localhost ~]# ll run.exp ），若没有需要添加([alei@localhost ~]# chmod +x run.exp)

<<<<<<<<<<<<<<<<<<<<<<<<<192.168.0.10<<<<<<<<<<<<<<<<<<<<

run.sh: line 16: ./run.exp: Permission denied

B：如果使用以上脚本信息，copy时每行前缀空格必须清除

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