cara menghapus cache di joomla
- Login ke administrator joomla anda.
- Klik Site - Maintenance kemudian klik Clear cache
- Klik pada pilihan group diselah kiri, secara otomatis akan memilih semua group.
- Klik icon Delete
Error The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5
Error pada saat update Linux seperti dibawah pi@raspberrypi:~/.config/htop $ sudo apt-get update Hit:1 http://deb.debian.org/debian buster InRelease Hit:2 http://deb.debian.org/debian-security buster/updates InRelease Hit:3 http://deb.debian.org/debian buster-updates InRelease Hit:4 http://archive.raspberrypi.org/debian buster InRelease Get:5 http://mirrors.bfsu.edu.cn/armbian buster InRelease [18.3 kB] Err:5 http://mirrors.bfsu.edu.cn/armbian buster InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5 Reading package lists... Done W: GPG error: http://mirrors.bfsu.edu.cn/armbian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5 E: The repository 'http://apt.armbian.com buster InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secu
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