i DELETED my private key file…
how can i get it back…
and i use command ‘certbot certonly --manual -d ‘*.aimeici.com’ --force-renewal’ get the error like this : “An unexpected error occurred:
There were too many requests of a given type :: Error creating new order :: too many certificates already issued for exact set of domains: *.aimeici.com: see https://letsencrypt.org/docs/rate-limits/”…
You deleted all five private keys?
First of all, you need to solemnly swear to this forum to never ever use --force-renewal again. Then we'll see if we want to help you get around the rate limits.
yeah…
because when i use the command as i mentioned above, it always show me success updated message, but the expired time never change in the message…so i thought it’s not updated successful…
then i deleted the new created key files , and tried many times with the command…
sorry for the --force-renewal param …but i have a little confused why can not use it…i googled it out and it works well every time before…
Because it always renews, whether you need it or not. In this case, you did not, and the expiration date didn't change (because it's longer than 30 days in the future).
Keep your certs for 60 days and let certbot renew them automatically.
ok i get that...next time i will not use the param
but it's not... because my certs last expiration date was today... so i tried to update it two days ago and the message did not show the correct expiration date cause i thought it's not success updated, and i delete the all key files 
now I get what the problem is. you used certonly, which does not install your certificate, and you still saw the old certificate when connecting to your website. you need to install the certificate after obtaining it, using a --deploy-hook or manually. go find certbot’s manpage and read it carefully.
ok…
but is there any way to solve the current problem that i’ve deleted my private key file.
i can not open my web through https…that makes me fluster now 
you can circumvent the rate limits, by searching the forum for the procedure. it comes up once… or twice per day.
You’re fired up today @9peppe. 
@yq122
I’m feeling generous today. After dealing with a monster issue for hours with little headway, I’m going to give you some clues. Follow @9peppe’s advice and don’t make regret my actions. @9peppe might grill me 
certbot certonly --manual -d aimeici.com,*.aimeici.com
As @9peppe pointed out, if you want certbot to also install the certificate, just remove certonly from the command.
You definitely want to have aimeici.com on your certificate anyhow. Currently you have some major problems without it.
THANKS A LOT…
it all done, my application can open through https now… that’s very kind of you two @freessltools.com @9peppe
and i solemnly swear to this forum to never ever use --force-renewal again.
again big thanks…you two have a nice day
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