shell 练习 （免密钥登陆脚本）

脚本说明 本地服务器ip 10.0.0.5  远程服务器地址 10.0.0.223

#!/bin/bash
remote_ip=$
if [ ! -n "$1" ] ;then
    echo "please usage ./without_password remote_host!"
    exit
else
    echo "the remote_host you input is $remote_ip"
fi
ssh root@$remote_ip "mkdir .ssh; chmod 700 .ssh"

ssh-keygen -t rsa
scp ~/.ssh/id_rsa.pub root@$1:/root/.ssh/authorized_keys
ssh root@$ "chmod 600 ~/.ssh/authorized_keys"
ssh root@$
ifconfig

退出远程

[root@localhost ~]# exit
logout
Connection to 10.0.0.223 closed.
eth0      Link encap:Ethernet  HWaddr :0C::DD::F9
          inet addr:10.0.0.50  Bcast:10.255.255.255  Mask:255.0.0.0
          inet6 addr: fe80::20c:29ff:fedd:80f9/ Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:
          RX packets: errors: dropped: overruns: frame:
          TX packets: errors: dropped: overruns: carrier:
          collisions: txqueuelen:
          RX bytes: (962.2 KiB)  TX bytes: (894.0 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::/ Scope:Host
          UP LOOPBACK RUNNING  MTU:  Metric:
          RX packets: errors: dropped: overruns: frame:
          TX packets: errors: dropped: overruns: carrier:
          collisions: txqueuelen:
          RX bytes: (16.5 KiB)  TX bytes: (16.5 KiB)