Could not get lock /var/lib/dpkg/lock-frontend - open 에러

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
 
위 에러를 아래와 같이 해결했습니다.
우선 터미널 여시고 모든 프로세스를 죽여줍니다~!1) sudo killall apt apt-get
만일 진행중인 프로세스가 없다라고 뜨면, 아래와 같이 하나하나씩 디렉토리를 삭제해주세요.
- sudo rm /var/lib/apt/lists/lock- sudo rm /var/cache/apt/archives/lock- sudo rm /var/lib/dpkg/lock*
sudo dpkg --configure -a  를 하시고 sudo apt update
완벽히 해결이 되네요 ^^ 
출처: https://kgu0724.tistory.com/71#google_vignette [병아리 개발자의 이야기:티스토리]