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App center shows that is 5 updates. But when I push to update, I see information: Waiting for package manager lock After while updating ends and I am on the start. I see 5 updates.

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Sounds like you have another install process running. Do you have another package manager like Synaptic running? if nothing else is running try a reboot. Also try updating from the terminal rather than the app center: sudo apt update && sudo apt upgrade

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    Thank you!!! sudo apt update && sudo apt upgrade solved my problem – Aleš Ulehla Feb 24 '17 at 17:59

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