Warning
Acording to Bugzilla sudo Bug ID=590 the call to sudo -n true 2&>/dev/null ; echo $? will become buggy around sudo -V 1.7.10
Read Bugzilla [here](http://bugzilla.sudo.ws/show_bug.cgi?id=590"Bug ID=590")
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Answer by Marco M. von Hagen for Sudo - is there a command to check if I have sudo and/or how much time is left?
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