我尝试使用以下命令安装NodeJS：
sudo apt-get install nodejs
问题是，它安装了旧版本的NodeJS。所以我找到了另一种方法来通过以下命令安装更新版本的NodeJS：
curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
但它不断向我发出以下错误消息：
adam@adam-pc:~$ curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
## Installing the NodeSource Node.js v9.x repo...
## Populating apt-get cache...
+ apt-get update
Get:1 http://hu.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Hit:2 http://ppa.launchpad.net/git-core/ppa/ubuntu xenial InRelease
Get:3 http://hu.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Ign:4 http://dl.google.com/linux/chrome/deb stable InRelease
Get:5 http://hu.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]
Hit:6 http://ppa.launchpad.net/linrunner/tlp/ubuntu xenial InRelease
Hit:7 http://dl.google.com/linux/chrome/deb stable Release
Ign:8 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial InRelease
Hit:9 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:10 http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu xenial InRelease
Ign:11 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial Release
Ign:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Ign:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Ign:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Ign:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Ign:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Err:12 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 Packages
404 Not Found
Ign:13 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main i386 Packages
Ign:14 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main all Packages
Ign:15 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en_US
Ign:16 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main Translation-en
Ign:17 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:18 http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial/main DEP-11 64x64 Icons
Fetched 451 kB in 6s (70,4 kB/s)
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/michael-gruz/canon-trunk/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
Error executing command, exiting
我现在一直在寻找解决方案几个小时，尝试了StackOverflow和我在谷歌上发现的不同论坛的10个想法，但仍然没有。
修改
同时我找到了解决方案。
我通过以下命令打开了Ubuntu Update manager：
update-manager
然后我点击了Settings和Other software标签，并取消了我发现的所有http://ppa.launchpad.net/内容，这些内容都是我发现的（尤其是所有michael-gruz链接）。
然后再次使用上面的命令：
curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
sudo apt-get install nodejs
现在我安装了v9.5.0。
答案 0 :(得分：2)
安装命令本身没有任何问题。如果您要查看它出错的原因，您可以看到启动板包已经过了404.如果删除此存储库，它将不会中断apt并允许安装包。您应该能够删除此删除的PPA，如下所示：
sudo add-apt-repository --remove ppa:michael-gruz/ppa
答案 1 :(得分：1)