解决UBUNTU16.04命令sudo apt-get update 报错Failed to fetch（亲测有效）

执行sudo apt-get update报错：

E: Failed to fetch http://ppa.launchpad.net/v-launchpad-jochen-sprickerhof-de/pcl/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found [IP: 91.189.95.83 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

解决方法：删除对应的ppa即可。

1.切换到对应ppa目录下

cd /etc/apt/sources.list.d

2.查看相关ppa文件

ll

3.删除无法下载的文件

sudo rm v-launchpad-jochen-sprickerhof-de-ubuntu-pcl-xenial.list

4.重新执行跟新命令

sudo apt-get update

参考链接：https://blog.csdn.net/u014775723/article/details/85224026