Real-time montoring script RAM bug

Hi,

Running Ubuntu 16.04, it looks like there is a bug in the ram part of the rtm script (https://docs.ovh.com/gb/en/dedicated/install-rtm/)

Here is the output of free:
>total used free shared buff/cache available
>Mem: 16198832 3225488 3522340 253672 9451004 12327944
>Swap: 523260 4 523256

The script gives me -114% as a result for ram consumption.

Looking at the script
> $mem_swap_usage{'mem_total'} = $1;
> $mem_swap_usage{'mem_used'} = $2;
> $mem_swap_usage{'mem_free'} = $3;
> $mem_swap_usage{'mem_shared'} = $4;
> $mem_swap_usage{'mem_buffers'} = $5;
> $mem_swap_usage{'mem_cached'} = $6;
> $mem_swap_usage{'mem_used_pr'} = sprintf("%d", (($2-$5-$6)/$1*100));

mem_cached is actually "available" from free, so it does used - cached - available / total, which doesn't make sense.

Maybe the script assume a different "free" format, or was based upon "/proc/meminfo", but I think the proper value should be:
> $mem_swap_usage{'mem_used_pr'} = sprintf("%d", (($1-$6)/$1*100));

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