How to Remove Double-Click in Ubuntu
- 1). Click the "Places" option on the top taskbar in Ubuntu.
- 2). Click the "Computer" option. The Computer window will open.
- 3). Click the "Edit" option on the top menu bar and then click "Preferences." The Computer Preferences dialog box will open.
- 4). Click the tab labeled "Behavior."
- 5). Click the radio button in front of "Single Click to Open Items."
- 6). Click the "Close" button. Double-click actions now require just a single-click in Ubuntu.
Source...