x86_64 asm example

; setup
;
; sudo apt-get install cmatrix nasm ; nasm -f elf64 -o matrix.o matrix.asm ; ld -o matrix matrix.o; ./matrix

SECTION .text
global  _start
 
_start:
 
    mov     rdx, environment    ; address of environment variables
    mov     rsi, arguments      ; address of the arguments to pass to the commandline
    mov     rdi, command        ; address of the file to execute
    mov     rax, 59             ; invoke SYS_EXECVE 
    syscall
    mov     eax, 60             ; exit(0)
    xor     rdi, rdi
    syscall 

SECTION .data
command         db      '/usr/bin/cmatrix', 0     ; command to execute
arg1            db      '-a', 0
arg2            db      '-b', 0
envp1           db      'TERM=xterm',0
arguments       dq      command
                dq      arg1,arg2           ; arguments to pass to commandline 
                dq      0h                  ; end the struct
environment     dq      envp1      
                dq      0h                  ; arguments to pass as environment variables (inthis case none) end the struct