Modify README

Author: KangLin

README.md

@@ -30,7 +30,6 @@ Author: Kang Lin (kl222@126.com)
     - https://gitlab.com/kl222/SerialPortAssistant
     - https://sourceforge.net/projects/serialportassistant/
     - https://gitee.com/kl222/SerialPortAssistant
-    - https://invent.kde.org/kanglin/SerialPortAssistant
     - https://bitbucket.org/kl222/serialportassistant
 - [Project home](http://kanglin.github.io/SerialPortAssistant)
 - This project is a cross-platform serial assistant.
@@ -64,16 +63,20 @@ Author: Kang Lin (kl222@126.com)
   - [![Download SerialPortAssistant](https://a.fsdn.com/con/app/sf-download-button)](https://sourceforge.net/projects/serialportassistant/files/latest/download)
 
 - Install
-  - ubuntu
+  - ubuntu, debian
     - [serialportassistant_0.5.29_amd64.deb](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/serialportassistant_0.5.29_amd64.deb)
 
           sudo apt install ./serialportassistant_0.5.29_amd64.deb
           # If you're on an older Linux distribution, you will need to run this instead:         
           # sudo dpkg -i serialportassistant_0.5.29_amd64.deb
           # sudo apt-get install -f # Install dependencies
 
-  - AppImage
+  - Other linux(AppImage)
     - [SerialPortAssistant_v0.5.29_x86_64.AppImage](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/SerialPortAssistant_v0.5.29_x86_64.AppImage)
+    
+          sudo chmod a+x SerialPortAssistant_v0.5.29_x86_64.AppImage
+          sudo ./SerialPortAssistant_v0.5.29_x86_64.AppImage
+
   - Windows
     - Windows xp
       - [SerialPortAssistant_v0.5.29_windows_xp_x86_Setup.exe](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/SerialPortAssistant_v0.5.29_windows_xp_x86_Setup.exe)
@@ -163,5 +166,9 @@ Bitcoin:
               libqt5scxml5-dev libqt5svg5-dev libqt5serialport5-dev \
               qtwebengine5-dev qtwebengine5-dev-tools qtwebengine5-private-dev
 
+- build_appimage.sh
+
+  build AppImage. See: https://github.com/linuxdeploy/linuxdeploy/
+
 - deploy.sh: This script is used to generate new release version numbers and tag.
   Used only by the program publisher.

README_zh_CN.md

@@ -30,7 +30,6 @@
     - 中国： https://gitee.com/kl222/SerialPortAssistant
     - https://gitlab.com/kl222/SerialPortAssistant
     - https://sourceforge.net/projects/serialportassistant/
-    - https://invent.kde.org/kanglin/SerialPortAssistant
     - https://bitbucket.org/kl222/serialportassistant
 - [项目主页](http://kanglin.github.io/SerialPortAssistant)
 - 本项目是一个跨平台的串口助手。  
@@ -58,16 +57,20 @@
   - [![Download SerialPortAssistant](https://a.fsdn.com/con/app/sf-download-button)](https://sourceforge.net/projects/serialportassistant/files/latest/download) 
 
 - 安装说明：
-  - ubuntu
+  - ubuntu、debian
     -  [serialportassistant_0.5.29_amd64.deb](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/serialportassistant_0.5.29_amd64.deb)
 
            sudo apt install ./serialportassistant_0.5.29_amd64.deb
            # 如果你是老的 Linux 发行系统。你需要用下列命令替换：
            # sudo dpkg -i serialportassistant_0.5.29_amd64.deb
            # sudo apt-get install -f # Install dependencies
         
-  - AppImage
+  - 其它 linux(AppImage)
     - [SerialPortAssistant_v0.5.29_x86_64.AppImage](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/SerialPortAssistant_v0.5.29_x86_64.AppImage)
+    
+           sudo chmod a+x SerialPortAssistant_v0.5.29_x86_64.AppImage
+           sudo ./SerialPortAssistant_v0.5.29_x86_64.AppImage
+
   - Windows
     - Windows xp
       - [SerialPortAssistant_v0.5.29_windows_xp_x86_Setup.exe](https://github.com/KangLin/SerialPortAssistant/releases/download/v0.5.29/SerialPortAssistant_v0.5.29_windows_xp_x86_Setup.exe)
@@ -157,4 +160,8 @@
               libqt5scxml5-dev libqt5svg5-dev libqt5serialport5-dev \
               qtwebengine5-dev qtwebengine5-dev-tools qtwebengine5-private-dev
 
+- build_appimage.sh
+
+  此脚本生成 AppImage 可执行文件。 详见：https://github.com/linuxdeploy/linuxdeploy/
+
 - deploy.sh: 此脚本用于产生新的发行版本号和标签。仅程序发布者使用。