deb http://buaya.klas.or.id/ubuntu/ jammy main restricted universe multiverse
deb http://buaya.klas.or.id/ubuntu/ jammy-updates main restricted universe multiverse
deb http://buaya.klas.or.id/ubuntu/ jammy-security main restricted universe multiverse
deb http://buaya.klas.or.id/ubuntu/ jammy-backports main restricted universe multiverse
deb http://buaya.klas.or.id/ubuntu/ jammy-proposed main restricted universe multiverse
deb ftp://ftp.itb.ac.id/pub/ubuntu/ jammy main restricted universe multiverse
deb ftp://ftp.itb.ac.id/pub/ubuntu/ jammy-updates main restricted universe multiverse
deb ftp://ftp.itb.ac.id/pub/ubuntu/ jammy-security main restricted universe multiverse
deb ftp://ftp.itb.ac.id/pub/ubuntu/ jammy-backports main restricted universe multiverse
deb ftp://ftp.itb.ac.id/pub/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://kartolo.sby.datautama.net.id/ubuntu/ jammy main restricted universe multiverse
deb http://kartolo.sby.datautama.net.id/ubuntu/ jammy-updates main restricted universe multiverse
deb http://kartolo.sby.datautama.net.id/ubuntu/ jammy-security main restricted universe multiverse
deb http://kartolo.sby.datautama.net.id/ubuntu/ jammy-backports main restricted universe multiverse
deb http://kartolo.sby.datautama.net.id/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://kebo.pens.ac.id/ubuntu/ jammy main restricted universe multiverse
deb http://kebo.pens.ac.id/ubuntu/ jammy-updates main restricted universe multiverse
deb http://kebo.pens.ac.id/ubuntu/ jammy-security main restricted universe multiverse
deb http://kebo.pens.ac.id/ubuntu/ jammy-backports main restricted universe multiverse
deb http://kebo.pens.ac.id/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://mirror.poliwangi.ac.id/ubuntu/ jammy main restricted universe multiverse
deb http://mirror.poliwangi.ac.id/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirror.poliwangi.ac.id/ubuntu/ jammy-security main restricted universe multiverse
deb http://mirror.poliwangi.ac.id/ubuntu/ jammy-backports main restricted universe multiverse
deb http://mirror.poliwangi.ac.id/ubuntu/ jammy-proposed main restricted universe multiverse
Update:
sudo nano /etc/apt/sources.list sudo apt update