How can i solve
1-issue of lock front-end which could not open lock file
2- issue of mouse right click is not working anywhere on desktop or on terminal,taskbar etc
please share the solution for it
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Can you elaborate both the issues further 
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As you can see this command showing in the screenshot Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
i really no idea whats this is,
Only thing i just want to resolve it but when i update and upgrade with -y its shown this error which don't access for dpkg front end lock
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