با سپاس از جوابتون. متاسفانه هیچکدام کار نکرد. عکس را چطور آپلود کنم؟
dpkg -l | grep opera
ii eject 2.39.3-9ubuntu6.3 amd64 ejects CDs and operates CD-Changers under Linux
ii gpg 2.4.4-2ubuntu17.3 amd64 GNU Privacy Guard -- minimalist public key operations
ii libbytesize-common 2.10-1ubuntu2 all library for common operations with sizes in bytes - translations
ii libbytesize1:amd64 2.10-1ubuntu2 amd64 library for common operations with sizes in bytes
arman@arman-studio1535:~$ sudo dpkg --purge opera-stable
[sudo] password for arman:
dpkg: warning: ignoring request to remove opera-stable which isn't installed
arman@arman-studio1535:~$ lxqt-config-mainmenu
lxqt-config-mainmenu: command not found
arman@arman-studio1535:~$ sudo dpkg --purge opera
dpkg: warning: ignoring request to remove opera which isn't installed