Concernant Synaptic, Opera n'apparaît même pas dans la liste des paquets :/
Pour le "locate opera", voici le résultat (je n'arrive pas à remonter jusqu'au début et lorsque je fais sélectionner tout, il y a des centaines de lignes vides avant celles-ci ...)
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/ChangeLog
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/FAQ
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/INSTALL
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/Makefile.am
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/Makefile.in
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/NEWS
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/README
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/TODO
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/aclocal.m4
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autogen.sh
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/config
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/config.guess
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/config.h.in
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/config.h.in~
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/config.sub
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/configure
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/configure.in
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/contrib
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/debugfiles.list
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/debugsources.list
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/depcomp
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/install-sh
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/ltmain.sh
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/man
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/missing
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/mkinstalldirs
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache/output.0
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache/output.1
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache/requests
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache/traces.0
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/autom4te.cache/traces.1
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/contrib/pam_keyring.spec
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/man/Makefile.am
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/man/Makefile.in
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/man/README
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/man/pam_keyring.8
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src/Makefile.am
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src/Makefile.in
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src/compat.c
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src/compat.h
/home/lolepops/.opera/temporary_downloads/pam_keyring-0.0.8/src/pam-keyring-tool.c
Pour le "sudo find / -name opera", il ne se passe rien une fois le mot de passe rentré. Je vais laisser le terminal ouvert afin de voir si quelque chose se passe ...