導入 Erlang GPG Key

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sudo apt update
sudo apt install software-properties-common apt-transport-https
wget -O- https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc | sudo apt-key add -

把Erlang Repository 加入 Ubuntu 20.04的 apt sources list

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echo "deb https://packages.erlang-solutions.com/ubuntu focal contrib" | sudo tee /etc/apt/sources.list.d/erlang.list

使用 apt 安裝 Erlang

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sudo apt update
sudo apt install erlang

檢查

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knightli@epyc:~$ erl
Erlang/OTP 24 [erts-12.2.1] [source] [64-bit] [smp:64:64] [ds:64:64:10] [async-threads:1] [jit]

Eshell V12.2.1  (abort with ^G)
1> 
User switch command
 --> q

編輯 hello.erl測試文件

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% This is a test Hello World Erlang Code
-module(hello).
-import(io,[fwrite/1]).
-export([helloworld/0]).

helloworld() ->
   fwrite("Hello, Erlang World!\n").

編譯並運行

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knightli@epyc:~$ erl
Erlang/OTP 24 [erts-12.2.1] [source] [64-bit] [smp:64:64] [ds:64:64:10] [async-threads:1] [jit]

Eshell V12.2.1  (abort with ^G)
1> c(hello).
{ok,hello}
2> hello:helloworld().
Hello, Erlang World!
ok
3>  
User switch command
 --> q