怎么删掉一个 ubuntu 系统显示已经作废的 ppa 源？

[miniyao]

显示这个源已经作废了 jonathonf/ffmpeg-3

ubuntu@VM-113-205-ubuntu:~$ sudo apt-get update | grep "Failed"
W: Failed to fetch ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu/dists/trusty/main/binary-amd64/Packages  403  Forbidden [IP: 91.189.95.83 80]

W: Failed to fetchppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu/dists/trusty/main/binary-i386/Packages  403  Forbidden [IP: 91.189.95.83 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

用这个命令删不掉：

sudo add-apt-repository --remove ppa:jonathonf/ffmpeg-3

---

Cannot add PPA: 'ppa:jonathonf/ffmpeg-3'.
Please check that the PPA name or format is correct.

---

[Muniesa]

直接去 /etc/apt/source.list.d 里面删呢