Output:

 # zpool status 
   ... 
  scan: scrub in progress since Sun Jul 25 16:07:49 2021 
      403M scanned at 100M/s, 68.4M issued at 10.0M/s, 405M total 
      0B repaired, 16.91% done, 00:00:04 to go 

Where:

Metadata which references 403M of file data has been scanned at 100M/s, and 68.4M of that file data has been scrubbed sequentially at 10.0M/s.

As more public certificate authorities hop on the ACME bandwagon, it is important to understand the details and limitations of their implementations. This page will attempt to keep track of that data.

On 30th September 2021, the root certificate that Let's Encrypt are currently using, the IdentTrust DST Root CA X3 certificate, will expire. You may or may not need to do anything about this Root CA expiring, but I'm betting a few things will probably break on that day so here's what you need to know!

There are hundreds of publicly trusted Certificate Authorities and a subset of those implement a specification for certificate request/renewal called ACME (Automatic Certificate Management Environment) https://datatracker.ietf.org/doc/html/rfc8555 (ACME v2). Anyone can create (and use) a new certificate authority but only recognised CAs which can prove they follow strict issuance guidelines become generally trusted. You can, for instance, create your own ACME certificate authority and trust it within your organisation, but it won't be trusted by computers outside your organisation.

When we finally flew over the front of the enormous glacier after weeks of travelling, I found myself staring down at an epic vision of shattered ice. //

I was surprised how moved I was by what I'd seen. In the weeks it took to travel home, I tried to process my emotions.

I thought about the men and women who had set our camp, who flew the planes, cooked the meals, processed the rubbish and groomed the ice runways. And I thought about the scientists who have been studying the processes at work for decades.

Our research trip was only possible because of a huge chain of human enterprise culminating with the hardworking people in the UK and US whose taxes paid for it all. //

Satellite monitoring shows that the overall rate of ice loss from West Antarctica has increased five-fold over a 25-year period. This one glacier - Thwaite's glacier - alone now accounts for 4% of global sea level rise.

Needless to say, this acceleration is a result of us humans polluting the air with greenhouse gases. That fact explodes any impression that the ice is overwhelming. The opposite is true, we are overwhelming the ice. //

But I will not forget what I saw in Antarctica. It reminds us that climate change is a process that is likely to take centuries to play out, and tens of thousands of years to reverse.

Consider this: the last time CO2 levels were this high is reckoned to have been around four million years ago and it is estimated that the sea level then could have been as much as 30-40 metres higher than it is now.

That's a measure of how important the climate issue is and also explains why I'm so pleased to be given this opportunity to play a role in covering it for the BBC.

Tackling global warming will be the central project of the 21st Century and it is an incredible privilege to have been given a front row seat.