```
check_memfree v1.0

Check free memory space on local machine.

Usage: 
check_memfree [-hV] -w <percent_free>% -c <percent_free>%
check_memfree [-hV] -w <bytes_free> -c <bytes_free>

Options:
 -h
    Print detailed help screen
 -V
    Print version information
 -w INTEGER
    Exit with WARNING status if less than INTEGER bytes of memory space are free
 -w PERCENT%
    Exit with WARNING status if less than PERCENT of memory space is free
 -c INTEGER
    Exit with CRITICAL status if less than INTEGER bytes of memory space are free
 -c PERCENT%
    Exit with CRITCAL status if less than PERCENT of memory space is free
```