Taka-pc

Kurang lebih errornya seperti ini

W: GPG error: http://extra.linuxmint.com rosa Release: The following signatures were invalid: BADSIG 3EE67F3D0FF405B2 Clement Lefebvre (Linux Mint Package Repository v1) <root@linuxmint.com>
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

Nah jika erronya seperti itu saya punya solusi

Langka-langkah

1. ketikan perintah dibawah ini di terminal
sudo rm -r /var/lib/apt/lists
sudo mkdir -p /var/lib/apt/lists/partial
sudo apt-get clean
sudo apt-get update


 2. Lihat hasil updatenya apakah berhasil