To use lxqt-sudo is important to not change your config files as if you did with sudo. You will need adminstartive privledges to edit config files but make sure you know what you are doing.
Version
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Lubuntu ships with 0.13.0 of lxqt-sudo.
How to Launch
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To launch lxqt-sudo from the command line to run featherpad with administrative privlideges use