updates

docker/docker.md

@@ -2,8 +2,8 @@
 
 ## step 1: 安装必要的一些系统工具
 
-sudo apt-get update
-sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common
+sudo apt update
+sudo apt -y install apt-transport-https ca-certificates curl software-properties-common
 
 ## step 2: 安装GPG证书
 
@@ -15,8 +15,8 @@ sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/li
 
 ## Step 4: 更新并安装 Docker-CE
 
-sudo apt-get -y update
-sudo apt-get -y install docker-ce
+sudo apt -y update
+sudo apt -y install docker-ce
 
 
 ## 加速
@@ -36,5 +36,18 @@ sudo systemctl restart docker
 
 ``` bash
 docker login registry.cn-hangzhou.aliyuncs.com
+## not to type sudo 
+
+``` bash
+cat /ect/group
+# if docker grouo not exist , then run this command: sudo groupadd docker
+
+sudo gpasswd -a ${USER} docker
+# add me into docker group
+
+sudo service docker restart
+
+reboot  # or relogin
+
 ```