CentoS server synchronization upload instructions (Mysync focus, the most convenient to use)

copy all scp instructions

scp -r /opt/module  dev1@hadoop100:/opt/

rsync: The speed of fast synchronization is faster than scp (only updates the difference file).
For example:

rsync -rvl /opt/software/ dev1@hadoop102:/opt/software

Mysync command:

1. Need configuration file

Switch directory:

cd /home/dev1
mkdir bin
cd bin/
vim Mysync

Add in the Mysync file

#!/bin/bash
#1 获取输入参数个数，如果没有参数，直接退出
pcount=$#
if((pcount==0)); then
echo no args;
exit;
fi

#2 获取文件名称
p1=$1
fname=`basename $p1`
echo fname=$fname

#3 获取上级目录到绝对路径
pdir=`cd -P $(dirname $p1); pwd`
echo pdir=$pdir

#4 获取当前用户名称
user=`whoami`

#5 循环  这个地方的主机名是自己的，一定要改成自己可以起作用
for((host=100; host<103; host++)); do
        echo ------------------- hadoop$host --------------
        rsync -rvl $pdir/$fname $user@hadoop$host:$pdir
done

Modify execution permissions

sudo chmod 777 Mysync

No light up means no permission

3. Command format
   Mysync + file name
   For example

Mysync /home/dev1/bin

Then there will be a prompt to enter the password, enter the password of hadoop100, hadoop101, hadoop102, and hadoop193 in turn.