# 啟動容器
## **容器的基本操作**
### **exit (離開容器)**
**離開互動界面:使用者透過 exit 命令或 Ctrl+d 來退出終端時，所建立的容器立刻終止**
### **docker ps**
**可以發現執行中的容器。**
### **docker ps -a**
**要檢視已經被中止的容器，請加入 -a 的選項**
### **docker start 容器**
**處於終止狀態的容器，可以透過 docker start 命令來重新啟動**
**docker start firstubuntu**
**docker ps(可以看到正在執行的容器)**
\
**不過，此時容器已於背景執行，若要再次進入互動界面，請使用 attach**
### **docker attach 容器**
**docker attach firstubuntu**\
**此時，又再次進入容器之中，你可以對容器進行一些操作，就像你在操作一般的ubuntu一樣**
**按下 ctrl + P 然後 ctrl + Q 跳離容器，讓它繼續在背景執行**
### **docker於背景中執行**
**大多的時候，需要讓 Docker 容器在背景執行。此時，可以透過新增 -d 參數來實作。**\
**docker run -itd --name secondubuntu ubuntu**
**這樣，就會產生名為secondubuntu的容器，並於背景中執行**
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