sudo vim /etc/hosts

或者

sudo vim /private/etc/hosts

这两个文件其实是一个，是通过link做的链接。注意要加上sudo, 以管理员运行,否则不能存盘。

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
50.116.33.29 sublime.wbond.net
127.0.0.1 windows10.microdone.cn
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal

192.168.56.100 hadoop100
192.168.56.101 hadoop101
192.168.56.102 hadoop102
192.168.56.103 hadoop103
192.168.56.104 hadoop104
# End of section

vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
vi /etc/sysconfig/network-scripts/ifcfg-enp0s8

[root@hadoop101 ~]# hostnamectl set-hostname hadoop107
[root@hadoop101 ~]# hostname
hadoop107

touch /user/local/bin/xcall

chmod +x /user/local/bin/xcall

vi/user/local/bin/xcall


#!/bin/bash
pcount=$#
if((pcount==0));then
echo no args;
exit;
fi

echo ---------running at localhost--------
$@
for((host=101;host<=104;host++));do
echo ---------running at hadoop$host-------
ssh hadoop$host $@
done
~

[root@hadoop100 ~]# xcall pwd
---------running at localhost--------
/root
---------running at hadoop101-------
root@hadoop101's password:
/root
---------running at hadoop102-------
root@hadoop102's password:
/root
---------running at hadoop103-------
root@hadoop103's password:
/root
---------running at hadoop104-------
root@hadoop104's password:
/root
[root@hadoop100 ~]#

[root@hadoop100 ~]# ls
anaconda-ks.cfg
[root@hadoop100 ~]# scp anaconda-ks.cfg hadoop104:/root/
root@hadoop104's password:
anaconda-ks.cfg 100% 1233 61.1KB/s 00:00
[root@hadoop100 ~]#

[root@hadoop100 ~]# xcall sudo yum install -y rsync

[root@hadoop100 /]# rsync -r /opt/modules/jdk1.8.0_121/ hadoop102:/opt/modules/jdk1.8.0_121/