Rvm깔다가 에러가 떴어요 ㅠㅠ

안녕하세요!
루비를 독학하려는 사람입니당!
근데 rvm깔다가 에러가 떠서 해결하고 싶어 글을 올립니다
많은 가르침 부탁합니당
에러는 아래와 같습니다

Error running 'requirements_debian_update_system ',
showing last 15 lines of /home/joowon/.rvm/log/1420455105/update_system.log

  • case "${TERM:-dumb}" in

  • case "$1" in

  • [[ -t 2 ]]

  • return 1

  • printf %b 'There has been error while updating ‘'‘apt-get’'’, please give it some time and try again later.
    [color=#FF0000:jzv3d5w6]404 errors should be fixed for rvm to proceed[/color:jzv3d5w6]. Check your sources configured in:
    /etc/apt/sources.list
    /etc/apt/sources.list.d/.list
    \n’
    There has been error while updating ‘apt-get’, please give it some time and try again later.
    404 errors should be fixed for rvm to proceed[/color]. Check your sources configured in:
    /etc/apt/sources.list
    /etc/apt/sources.list.d/
    .list

  • return 100

/etc/apt/sources.list를 쳐도 허가 거부가 계속 떠서 들어가지 못하고 있습니다 ㅠㅠㅠ 어떻게 해야하죠??