When you use a sudo command normally the password is saved for 15 minutes, If you want to change sudo remembering time in ubuntu, you need to change the configuration of visudo. This post explain you how to change sudo remembering time in Ubuntu, debian.
This is a widget panel. To remove this text, login to your WordPress admin panel and go to Appearance >> Widgets, and drag & drop a widget into this widget panel. If you want to leave this area blank, simply put a blank Text widget into this widget panel which will overwrite this text.