[Ubuntu].desktop file. “There was an error lunching the application”

設定Eclipse啟動圖示時，編寫**.desktop** 檔案，在啟動欄找不到圖示，並且在目錄下也無法啟動，顯示資訊：

“There was an error lunching the application”

解決辦法：執行desktop-file-validate對檔案錯誤資訊進行除錯。

cd /usr/share/applications
desktop-file-validate eclipse.desktop

.desktop file set-up

1. 進入applications目錄

cd /usr/share/applications

2. 編寫檔案

sudo vim eclipse.desktop

add text :

[Desktop Entry]
Name=Eclipse
Comment=eclipse 
Exec=/usr/local/eclipse/eclipse
Icon=/usr/local/eclipse/icon.xpm
Terminal=false
StartupNotify=true
Type=Application
Categories=Application;Development;
 

3. 除錯
   執行出現錯誤資訊：

“There was an error lunching the application”

debug:

/applications$ desktop-file-validate eclipse.desktop
eclipse.desktop: error: line "[Desktop Entry] " ends with a space, but looks like a group. The validation will continue, with the trailing spaces ignored.
eclipse.desktop: warning: value "eclipse "
 
 for key "Comment" in group "Desktop Entry" looks redundant with value "Eclipse " of key "Name"
eclipse.desktop: error: value "false " for boolean key "Terminal" in group "Desktop Entry" contains invalid characters, boolean values must be "false" or "true"
eclipse.desktop: error: value "true " for boolean key "StartupNotify" in group "Desktop Entry" contains invalid characters, boolean values must be "false" or "true"
eclipse.desktop: error: value "Application " for key "Type" in group "Desktop Entry" is not a registered type value ("Application", "Link" and "Directory")
eclipse.desktop: warning: value "Application;Development; " for key "Categories" in group "Desktop Entry" contains a deprecated value "Application"
eclipse.desktop: error: value "Application;Development; " for key "Categories" in group "Desktop Entry" contains an unregistered value " "; values extending the format should start with "X-"

發現錯誤，所有語句後面都多了空格，導致命令資訊錯誤。把多餘空格資訊刪除，重新執行成功。
4. 測試通過
開啟程式欄，輸入eclipse，成功執行。

總結

• .desktop檔案不會自動忽略空格，多餘空格導致命令錯誤。
• .desktop檔案可以用desktop-file-validate除錯