오류
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5031 (unattended-upgr)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
해결
sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock*
sudo dpkg --configure -a
(이후 sudo 명령어)
sudo apt update
sudo apt install 이든
sudo apt-get install 이든
둘 다 해결가능.
아오 그만 좀 떠라