I tried installing vivaldi-beta on f23, and got:
sudo rpm -i ~/Downloads/vivaldi-beta-1.0.303.52-2.x86_64.rpm [sudo] password for nbecker: warning: /home/nbecker/Downloads/vivaldi-beta-1.0.303.52-2.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID bf1700f8: NOKEY warning: Generating 2 missing index(es), please wait... error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Resource temporarily unavailable) error: /tmp/google.sig.gc6XhF: key 1 import failed. Redirecting to /bin/systemctl start atd.service
Any ideas on these errors?