我想使用env，但 Ubuntu 告诉我它没有安装。如果我尝试安装它，Ubuntu 会告诉我无事可做。如何解决这个问题？
$ env
The program 'env' is currently not installed. You can install it by typing:
sudo apt install coreutils
$ sudo apt install coreutils
[sudo] password for jan:
Reading package lists... Done
Building dependency tree
Reading state information... Done
coreutils is already the newest version (8.25-2ubuntu3~16.04).
0 upgraded, 0 newly installed, 0 to remove and 25 not upgraded.
$ env
The program 'env' is currently not installed. You can install it by typing:
sudo …