Question: I like to add "C:\Windows\System32\drivers\etc\hosts" to the pinned documents of my text-editor (PSPad) on the taskbar.

Usually I only need to open a document and after that it shows ab in the recent documents list of this app in the taskbar. But the `hosts` file does not show up. I think because it has no extension?!

As you can see I have the document `linux_cmd.txt` added to this list:
[![enter image description here](https://i.stack.imgur.com/DWDSN.png)](https://i.stack.imgur.com/DWDSN.png)

I tried to search for this filename in `regedit` but could not find any entries. Where does Windows 10 save this list or is there an other way to add the `hosts` file to it?

Answer: 
Install the perl-Env package to obtain Env.pm. 

```
yum install perl-Env

```

You can also use the whatprovides feature of yum to see what packages provide files, 

```
yum whatprovides */Env.pm

perl-Env-1.04-2.el7.noarch : Perl module that imports environment variables as scalars or arrays Repo        : base Matched from: Filename    : /usr/share/perl5/vendor_perl/Env.pm

```
You can also install Env module from cpan central repo which is equivalent to installing rpm package