Send the following on WhatsApp
Continue to ChatRestore Synaptic Mark All Upgrades Button in Linux Mint https://tuxtweaks.com/2013/07/restore-synaptic-mark-all-upgrades-linux-mint/
Restore Synaptic Mark All Upgrades Button in Linux Mint https://tuxtweaks.com/2013/07/restore-synaptic-mark-all-upgrades-linux-mint/