Runing mix new app_first failed on CentOS - centos

Question

I also encounter the problem: Runing mix new app_first failed in Elixir.
It runs on centos. This is the message:
The erlang version is normal :
github#localhost:$ erl
Erlang/OTP 24 [erts-12.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1]
The elixir version is normal
github#localhost:~/elixir-otp-24$ bin/elixir --version
Erlang/OTP 24 [erts-12.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1]
Elixir 1.14.0 (compiled with Erlang/OTP 24)
But the mix is abnormal
github#localhost:~/elixir-otp-24$ bin/mix
{"init terminating in do_boot",{badarg,[{erlang,apply,[{'Elixir.Kernel.CLI.Config',[],<<".">>,[],true,[],[],false},update_commands,[#Fun<Elixir.Kernel.CLI.18.41400255>]],[{error_info,#{module=>erl_erts_errors}}]},{'Elixir.Kernel.CLI',process_argv,2,[{file,"lib/kernel/cli.ex"},{line,191}]},{'Elixir.Kernel.CLI',main,1,[{file,"lib/kernel/cli.ex"},{line,14}]},{init,start_em,1,[]},{init,do_boot,3,[]}]}}
init terminating in do_boot ({badarg,[{erlang,apply,[{_},update_commands,[_]],[{_}]},{Elixir.Kernel.CLI,process_argv,2,[{_},{_}]},{Elixir.Kernel.CLI,main,1,[{_},{_}]},{init,start_em,1,[]},{init,do_boot,3,[]}]})
Crash dump is being written to: erl_crash.dump...done
I have tried many ways, such as building from source. But it always failed.

Answer 1

I find the anwer: it should be setting environment variables.
PATH=/data/github/elixir-otp-24/bin:$PATH
Put it in .bashrc
Source .bashrc
It works
github#localhost:~$ mix
** (Mix) "mix" with no arguments must be executed in a directory with a mix.exs file
Usage: mix [task]