在多机集群环境中，经常面临修改配置文件后拷贝到多台服务器的情况，传统的执行scp比较麻烦，所以写了以下shell脚本，可以将指定文件拷贝到多台机器。
使用方法请参见HELP部分代码。
#!/bin/bash
help()
{
cat << HELP
--------------HELP------------------------
This shell script can copy file to many computers.
Useage:
copytoall filename(full path form /home) targetpathfrom/ username ip1 ip2 ip3....
Example:
copytoall /home/casliyang/Hadoop-2.2.0/etc/hadoop/core-site.xml /home/casliyang/hadoop-2.2.0/etc/hadoop/ casliyang 192.168.0.5 192.168.0.6 192.168.0.7 192.168.0.8
------------------------------------------
HELP
exit 0
}
currentdate=$(date +%Y-%m)
echo $currentdate " execute copytoall"
if [ $1 = "-h" ] ; then
help
exit 0
fi
file=$1
shift
targetpath=$1
shift
user=$1
shift
tempip=0
if [ -f $file ] ; then
while [ $# -gt 0 ] ; do
tempip=$1
shift
scp $file ${user}@${tempip}:${targetpath}
done
else
echo "wrong file!"
exit 0
fi
