ubuntu public key is not available: NO_PUBKEY
![ubuntu public key is not available: NO_PUBKEY](https://www.baimeidashu.com/wp-content/themes/zimeiti-2/thumb.php?src=https://www.baimeidashu.com/wp-content/themes/zimeiti-2/assets/img/default.png&w=280&h=180)
The following signatures couldn’t be verified because t…
nvoke-Success ‘if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi
![nvoke-Success ‘if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi](https://www.baimeidashu.com/wp-content/themes/zimeiti-2/thumb.php?src=https://www.baimeidashu.com/wp-content/themes/zimeiti-2/assets/img/default.png&w=280&h=180)
nvoke-Success ‘if /usr/bin/test -w /var/lib/command-not…