STEP 1 – Open File sources.list
Buka File sources.list pada folder /etc/apt menggunakan software text editor nano

STEP 2 – Tambahkan Baris Pada File sources.list
Hapus atau Comment semua repository yang ada lalu copy paste baris di bawah ini seperti gambar 2
# deb cdrom:[Debian GNU/Linux 11.1.0 _Bullseye_ - Official amd64 DVD Binary-1 20211009-10:08]/ bullseye contrib main
#deb cdrom:[Debian GNU/Linux 11.1.0 _Bullseye_ - Official amd64 DVD Binary-1 20211009-10:08]/ bullseye contrib main
deb http://kartolo.sby.datautama.net.id/debian/ bullseye main
deb-src http://kartolo.sby.datautama.net.id/debian/ bullseye main
deb http://security.debian.org/debian-security bullseye-security main contrib
deb-src http://security.debian.org/debian-security bullseye-security main contrib
# bullseye-updates, to get updates before a point release is made;
# see https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_updates_and_backports
deb http://kartolo.sby.datautama.net.id/debian/ bullseye-updates main contrib
deb-src http://kartolo.sby.datautama.net.id/debian/ bullseye-updates main contrib

STEP 3 – Update Repository
Update repository seperti pada script di bawah ini.
root@firmanprtama:~# apt update -y
