Update README.md

Author: j2doll

README.md

@@ -106,6 +106,55 @@ git pull
 cd ..
 ```
 
+## Bash (Linux, Unix)
+
+- `fetchAll.sh`
+  
+```bash
+#!/bin/bash
+
+# Save the current working directory
+WORKDIR=$(pwd)
+
+# Set Git repository name and URL
+GIT_NAME="QPing"
+GIT_REPO="https://github.com/JayTwoLab/QPing.git"
+
+# Remove the existing directory if it exists
+if [ -d "$GIT_NAME" ]; then
+    rm -rf "$GIT_NAME"
+fi
+
+# Clone the Git repository
+git clone "$GIT_REPO"
+cd "$GIT_NAME" || exit 1
+
+# Fetch all remote branches
+git fetch --all
+
+# Get list of remote branches excluding HEAD and origin/master
+branches=$(git branch -r | grep -v "HEAD" | grep -v "origin/master")
+
+# For each branch, check it out and pull the latest changes
+while read -r full_branch; do
+    full_branch=$(echo "$full_branch" | xargs)             # Trim whitespace
+    branch_name=${full_branch#origin/}                     # Remove 'origin/' prefix
+
+    echo ""
+    echo "[Checkout and pull] $full_branch → $branch_name"
+
+    git checkout -B "$branch_name" "$full_branch"
+    git pull origin "$branch_name"
+done <<< "$branches"
+
+# Switch back to master branch and pull
+git checkout master
+git pull
+
+# Return to the original working directory
+cd "$WORKDIR" || exit 1
+```
+
 ## License 
 
 - MIT License