一台Linux服务器向多台服务器同时上传文件脚本-岸边IBIAN

运维工作中，时常需要向多台服务器上传文件，如果使用FTP等软件上传效率很慢，配置rsync当然可以实现，本文介绍一种更为方便的方法。
我绘制了拓扑图供参考：

本文要实现上图中 server0（服务端） 要向 server1 server2 server3（客户端） 同时传输文件。预设IP地址：

server0：192.168.1.10
server1：192.168.1.11
server2：192.168.1.12
server3：192.168.1.13

生成服务器之间密钥

# ssh-keygen //一直回车使用默认值
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
e0:f6:59:eb:f7:a6:e3:2f:16:39:a2:14:61:31:4a:1f root@LinServ-1

ssh-keygen 用于为生成、管理和转换认证密钥，包括 RSA 和 DSA 两种密钥。密钥类型可以用 -t 选项指定。如果没有指定则默认生成用于SSH-2的RSA密钥。
复制密钥文件到远程服务器

ssh-copy-id -i /root/.ssh/id_rsa 192.168.1.11
The authenticity of host '192.168.1.11 (192.168.1.11)' can't be established.
RSA key fingerprint is 6e:34:d4:8c:fb:72:72:3a:49:7a:14:23:20:59:ea:28.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.11' (RSA) to the list of known hosts.
root@192.168.1.11's password: (输入192.168.1.11 root密码)
Now try logging into the machine, with "ssh '192.168.2.11'", and check in:
  .ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
ssh-copy-id -i /root/.ssh/id_rsa 192.168.1.12
同上
ssh-copy-id -i /root/.ssh/id_rsa 192.168.1.13
同上

ssh-copy-id 命令可以把本地的ssh公钥文件安装到远程主机对应的账户下。

脚本

#!/bin/bash
while getopts f: OPT;
do
	case $OPT in
		f|+f)
			files="$OPTARG $files"
			;;
		*)
			echo "usage: `basename $0` [-f hostfile] <from> <to>"
			exit 2
	esac
done
shift `expr $OPTIND - 1`
if [ "" = "$files" ];
then
	echo "usage: `basename $0` [-f hostfile] <from> <to>"
	exit
fi
for file in $files
do
	if [ ! -f "$file" ];
	then
		echo "no hostlist file:$file"
		exit
fi
hosts="$hosts `cat $file`"
done
for host in $hosts;
do
	echo "do $host"
	scp $1 root@$host:$2
done

将以上脚本内容保存为：remotecopy.sh

创建主机列表文件

vim hostlist
192.168.1.11
192.168.1.12
192.168.1.13

每一行写上一个IP地址后保存。

在服务端 192.168.1.0 执行脚本

./remotecopy.sh -f /usr/local/hostlist /usr/local/test /usr/local/

/usr/local/hostlist 主机列表文件路径
/usr/local/test 需要传送的文件
/usr/local/ 传到客户端的位置

THE END

Linux
# 安装 # 命令 # 慢 # 密钥 # SSH