How to check and install missing perl modules

Check if module is installed. Errors mean missing module.
```
# perl -MModule::Name -e 1
```
See documentation of the module if installed.
```
# perldoc Module::Name
```
Open CPAN shell
```
# perl -MCPAN -e shell
```
To reconfigure the shell if needed.
```
cpan>o conf init
```
Install an available module.
```
cpan> install HTML::Template
```
You can run the Perl CPAN module via command line perl and get it installed in a single line:

# perl -MCPAN -e ‘install HTML::Template

# tar -zxvf HTML-Template-2.8.tar.gz

# perl Makefile.PL
# make
# make test
# make install