title: Unable to compile .asm file
body: <p>I try to compile file with NASM code in Linux terminal using this comand:</p>
  
  <pre><code>$ nasm -f elf /path/to/file.asm
  </code></pre>
  
  <p>I have an error. For first I thing that problem in file, I change the format to .asm but it don't help.
  Then I change code and past program from wikipedia but still don't work. 
  This is error: </p>
  
  <pre><code>nasm: fatal: unable to open output file /home/path/to/file.o'`
  </code></pre>
  
  <p>and this is code:</p>
  
  <pre><code>section .text
  org 0x100
      mov ah, 0x9
      mov dx, hello
      int 0x21
  
      mov ax, 0x4c00
      int 0x21
  
  section .data
  hello:  db 'Hello, world!', 13, 10, '$'
  </code></pre>