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We called it virtual because the process will continue to run when their window will not be visible even if you have disconnected. Now, if we are working on more than one session in a virtual way then we also may need to kill them. So let's see how we can kill the screen sessions. While using the GNU screen or screen session, We can exit from the detached session that needs cleanup. In this article, we will talk about many options for killing a detached screen session. Before going to discuss how to kill the existing session, let's go for listing the existing sessions. ### Listing Sessions First, let's create a couple of screen sessions by using the below command. ``` $ screen -dmS session_1 $ screen -dmS session_2 ``` This will create two sessions named session\_1 and session\_2. Notice that we have not attached this session because we have used **\-d**. Now let's see the sessions that we have created. For listing the created sessions, run the below command. **Command:** ``` $ screen -list ``` **Output:** Our two sessions show up:  Next, let's see how to kill these sessions. There are two methods to kill the session: - **Method 1:** Attach and kill the screen session. - **Method 2:** Kill the screen session without attaching. Let's discuss both methods ### Method 1: Attach and kill the screen session. First attach session\_1 that we have created above, For that run the below command. ``` $ screen -r session_1 ``` Now our command prompt is now inside our session. So we can just type:- ``` $ exit ``` The session will start terminating, and we can see \[screen is terminating\] in the output. Now we have only one session left. That is session\_2 because we have killed the session\_1. **Output:**  > **Note:** If the screen session had more than one window, we have to type **exit** at every window before the screen session would end. ## Method 2: Kill the screen session without attaching. In this method, we will not attach the session. Let's look up the way to kill the screen session without attaching them. First, create a couple of screen sessions to kill. ``` $ screen -dmS session_3 $ screen -dmS session_4 ``` Now, our two screen sessions have been created. Let's list the session by using the below command. ``` $ screen -list ``` **Output:**  Now, we will use the screen command argument **\-X** to send the command in a running screen version.The **\-S** will allow us to specify the session that we want to kill. And for killing that particular session, we will add the **quit** command. ``` $ screen -S session_3 -X quit ``` Now, the screen **session\_3** has been killed. Let's list our current sessions by using the below command. ``` $ screen -list ``` **Output:**  We can see that we have only session\_4 because we have killed the session\_3. ### Conclusion: In this article, we have discussed multiple methods to kill a Detached screen Session in Linux. In the first method, first, we have to attach the screen session, and then we can kill that. In the second, method we have seen that we can kill the screen session without attaching that. 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