我有一个Ubuntu 18.04服务器，我想安装Node.js。
我执行以下命令：
root@ubuntu:~# curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
root@ubuntu:~# apt-get install nodejs -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
nodejs is already the newest version (10.16.3-1nodesource1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@ubuntu node -v
Command 'node' not found, but can be installed with:
apt install nodejs
root@ubuntu:~# which node
root@ubuntu:~# which nodejs
如何解决此问题？