[erlang-questions] how to call os:cmd("ls") from shell?

[Jeremy Chow]

hi list,

I fellowed the otp document, but it failed.

# erl -s os cmd ls

Erlang (BEAM) emulator version 5.5.5 [source] [async-threads:0] [hipe]
[kernel-poll:false] [lock-checking]

{"init terminating in
do_boot",{function_clause,[{os,validate1,[[ls]]},{os,cmd,1},{init,start_it,1},{init,start_em,1}]}}

Crash dump was written to: erl_crash.dump


Thx,
Jeremy