CentOS 8.x erlang man pages installation

There is no erlang-doc package to help with automatic installation of man pages along with erlang. Thus, we need to install man pages manually using:

Check version of erlang installed using:
```
rpm -qa | grep erlang
```
Download erlang man pages tar gz of installed erlang version from https://www.erlang.org/downloads
tar xzf otp_doc_man*.tar.gz
mv man /usr/lib64/erlang
We should see man1, man3 etc. folders
```
ls /usr/lib64/erlang/man
```
Try below command
```
erl -man lists
```
If above does not works edit '/etc/man_db.conf' and insert following after other MANDATORY_MANPATH:
```
MANDATORY_MANPATH                       /usr/lib64/erlang/man
```
After this we can open erlang man pages directly with man using:
```
man lists
man erlang
```
Note that 'erl -man <module>' does not works. We can use either direct man command or man with directory name such as 'man -M /usr/lib64/erlang/man lists'.

Refer:

Anonymous