Update article

markdown/Deep Dive: Discord-Linux Automated Container Platform.md

@@ -915,6 +915,38 @@ await cmd('bash /home/scripts/check_exist.sh ' + sshSurfID).then(out => {
 });
 ```
 
+## The check_exist.sh script
+
+```bash
+#!/bin/bash
+if [ $( docker ps -a | grep $1 | wc -l ) -gt 0 ]; then
+  echo "1"
+else
+  echo "0"
+fi
+```
+
+This Bash script checks if a Docker container with a specific name or ID (passed as an argument to the script) exists. Here's a breakdown of what each part does:
+
+ **`#!/bin/bash`**:
+   - This is the shebang line that tells the system to run the script using the Bash shell.
+
+ **`if [ $( docker ps -a | grep $1 | wc -l ) -gt 0 ]; then`**:
+   - This checks if there is any Docker container matching the argument (`$1`) provided when running the script.
+   - **`docker ps -a`**: Lists all containers, including both running and stopped ones.
+   - **`grep $1`**: Searches for the container name or ID specified by `$1` in the list of containers.
+   - **`wc -l`**: Counts the number of lines output by the `grep` command, i.e., the number of matching containers.
+   - **`-gt 0`**: Checks if the count is greater than zero, meaning there is at least one match.
+
+ **`echo "1"`**:
+   - If a container with the given name or ID is found, it prints `1`, indicating the container exists.
+
+ **`else`**:
+   - This handles the case where no matching container is found.
+
+ **`echo "0"`**:
+   - If no container matches, it prints `0`, indicating the container does not exist.
+
 This step ensures that users cannot attempt to write to a non-existent container, which prevents potential errors and ensures smooth operation.
 
 ### Capturing User Input with a Modal