kernel 자동 업데이트 disable

# sed -i 's/1/0/g' /etc/apt/apt.conf.d/20auto-upgrades
# dpkg-reconfigure -f noninteractive unattended-upgrades
# systemctl disable apt-daily-upgrade.timer
# systemctl daemon-reload

@현재 메모리에 로드된 커널버전 확인

# dpkg -l linux-image-\* | grep ^ii

@불필요 커널 패키지 삭제

# apt-get purge linux-image-5.4.0-131-generic linux-image-5.4.0-132-generic -y
# reboot