xormor 2016 from a tutorial, added: "0xa", rdx,14" from 13

section .data
    msg db      "hello, world!",0xa

section .text
    global _start
_start:
    mov     rax, 1
    mov     rdi, 1
    mov     rsi, msg
    mov     rdx, 14
    syscall
    mov    rax, 60
    mov    rdi, 0
    syscall