命令行执行while和for语句
while true;do echo hello world;sleep 1;done
for i in k8s-01 k8s-02 k8s-03 k8s-04;do ssh root@$i "yum install nfs-utils rpcbind -y";done
while true;do echo hello world;sleep 1;done
for i in k8s-01 k8s-02 k8s-03 k8s-04;do ssh root@$i "yum install nfs-utils rpcbind -y";done