diff --git a/src/ST.Client.Desktop.Avalonia.App/Program.cs b/src/ST.Client.Desktop.Avalonia.App/Program.cs
index 498bbddd0..ab4291caf 100644
--- a/src/ST.Client.Desktop.Avalonia.App/Program.cs
+++ b/src/ST.Client.Desktop.Avalonia.App/Program.cs
@@ -24,6 +24,8 @@ namespace System.Application.UI
 #if MAC
             AppDelegate.Init(/*args*/);
             FileSystemDesktopMac.InitFileSystem();
+#elif LINUX
+            FileSystemDesktopXDG.InitFileSystem();
 #else
             FileSystemDesktop.InitFileSystem();
 #endif
diff --git a/src/ST.Client.Desktop.Linux/FileSystemDesktopXDG.cs b/src/ST.Client.Desktop.Linux/FileSystemDesktopXDG.cs
new file mode 100644
index 000000000..f0046b9c1
--- /dev/null
+++ b/src/ST.Client.Desktop.Linux/FileSystemDesktopXDG.cs
@@ -0,0 +1,99 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace System.Application
+{
+    /// <summary>
+    /// 适用于 Linux 的文件系统初始化
+    /// <para>XDG Base Directory Specification</para>
+    /// <para>https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html</para>
+    /// <para>https://wiki.archlinux.org/title/XDG_Base_Directory</para>
+    /// </summary>
+    public sealed class FileSystemDesktopXDG : IOPath.FileSystemBase
+    {
+        private FileSystemDesktopXDG() => throw new NotSupportedException();
+
+        /// <inheritdoc cref="FileSystemDesktop.InitFileSystem"/>
+        public static void InitFileSystem()
+        {
+            var appDataPath = AppDataDirectory;
+            var cachePath = CacheDirectory;
+
+            var paths = new[] { appDataPath, cachePath, };
+            var dict_paths = paths.ToDictionary(x => x, Directory.Exists);
+
+            if (dict_paths.Values.All(x => !x))
+            {
+                var old_paths = new[] { FileSystemDesktop.AppDataDirectory, FileSystemDesktop.CacheDirectory, };
+                if (old_paths.All(Directory.Exists)) // 迁移之前根目录上的文件夹
+                {
+                    for (int i = 0; i < old_paths.Length; i++)
+                    {
+                        var path = paths[i];
+                        var old_path = old_paths[i];
+                        Directory.Move(old_path, path);
+                        dict_paths[path] = true;
+                    }
+                }
+            }
+
+            foreach (var item in dict_paths)
+            {
+                if (!item.Value)
+                {
+                    Directory.CreateDirectory(item.Key);
+                }
+            }
+
+            InitFileSystem(GetAppDataDirectory, GetCacheDirectory);
+            string GetAppDataDirectory() => appDataPath;
+            string GetCacheDirectory() => cachePath;
+        }
+
+        static string AppDataDirectory
+        {
+            get
+            {
+                var value = Environment.GetEnvironmentVariable(XDG_DATA_HOME);
+                if (!string.IsNullOrWhiteSpace(value))
+                {
+                    return Path.Combine(value, Constants.HARDCODED_APP_NAME);
+                }
+                value = Environment.GetEnvironmentVariable(HOME);
+                if (!string.IsNullOrWhiteSpace(value))
+                {
+                    return Path.Combine(value, ".local", "share", Constants.HARDCODED_APP_NAME);
+                }
+                throw new PlatformNotSupportedException();
+            }
+        }
+
+        static string CacheDirectory
+        {
+            get
+            {
+                var value = Environment.GetEnvironmentVariable(XDG_CACHE_HOME);
+                if (!string.IsNullOrWhiteSpace(value))
+                {
+                    return Path.Combine(value, Constants.HARDCODED_APP_NAME);
+                }
+                value = Environment.GetEnvironmentVariable(HOME);
+                if (!string.IsNullOrWhiteSpace(value))
+                {
+                    return Path.Combine(value, ".cache", Constants.HARDCODED_APP_NAME);
+                }
+                throw new PlatformNotSupportedException();
+            }
+        }
+
+        const string HOME = "$HOME";
+
+        const string XDG_DATA_HOME = "$XDG_DATA_HOME";
+
+        const string XDG_CACHE_HOME = "$XDG_CACHE_HOME";
+    }
+}
diff --git a/src/ST.Client/FileSystemDesktop.cs b/src/ST.Client/FileSystemDesktop.cs
index b441de920..541d50f25 100644
--- a/src/ST.Client/FileSystemDesktop.cs
+++ b/src/ST.Client/FileSystemDesktop.cs
@@ -13,29 +13,45 @@ namespace System.Application
     {
         private FileSystemDesktop() => throw new NotSupportedException();
 
-        /// <summary>
-        /// 初始化文件系统
-        /// </summary>
-        public static void InitFileSystem()
+        static string BaseDirectory
         {
-            //var appDataRootPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-            //if (string.IsNullOrWhiteSpace(appDataRootPath))
-            //{
-            //    // 需要测试 macOS 和 linux 上 Environment.SpecialFolder.ApplicationData 返回的目录值
-            //    // 之前在 android 上测试过 Environment.GetFolderPath 有些枚举值返回的是空字符串 比如StartMenu
-            //    throw new ArgumentNullException(nameof(appDataRootPath));
-            //}
-            //appDataRootPath = Path.Combine(appDataRootPath, BuildConfig.APPLICATION_ID);
-
-            var appDataRootPath =
+            get
+            {
+                var appDataRootPath =
 #if NET35
                 WinFormsApplication.StartupPath;
 #else
                 IOPath.BaseDirectory;
 #endif
+                return appDataRootPath;
+            }
+        }
 
-            var appDataPath = Path.Combine(appDataRootPath, IOPath.DirName_AppData);
-            var cachePath = Path.Combine(appDataRootPath, IOPath.DirName_Cache);
+        public static string AppDataDirectory
+        {
+            get
+            {
+                var appDataPath = Path.Combine(BaseDirectory, IOPath.DirName_AppData);
+                return appDataPath;
+            }
+        }
+
+        public static string CacheDirectory
+        {
+            get
+            {
+                var cachePath = Path.Combine(BaseDirectory, IOPath.DirName_Cache);
+                return cachePath;
+            }
+        }
+
+        /// <summary>
+        /// 初始化文件系统
+        /// </summary>
+        public static void InitFileSystem()
+        {
+            var appDataPath = AppDataDirectory;
+            var cachePath = CacheDirectory;
             IOPath.DirCreateByNotExists(appDataPath);
             IOPath.DirCreateByNotExists(cachePath);
             InitFileSystem(GetAppDataDirectory, GetCacheDirectory);