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Comment by Bernd Bausch for Best practice is to not have passwords on cloud...

I would suspect some other device has the same IP address.

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Comment by najeh for Best practice is to not have passwords on cloud...

I acces to the instance and after a few time i lose this access and i can't ping the instance address. Where is the problem ? and show this error ssh: connect to host 192.168.x.x port 22: Connection...

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Comment by najeh for Best practice is to not have passwords on cloud...

Thanks this solve my issue, the mykey.pem will be the same for all instances ?

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Comment by Bernd Bausch for Best practice is to not have passwords on cloud...

For all instances that you launch with mykey. But if you like you can create other keypairs and run instances with those.

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Answer by Bernd Bausch for i use a ubuntu 18.04 image to launch the instance,...

Best practice is to not have passwords on cloud instances. If you have several hundred instances to look after, you either give them the same password (bad for security) or you have to remember several...

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Comment by najeh for you should inject password to ubuntu and then launch it

@novainfinite how can i do this ?

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Answer by novainfinite for i use a ubuntu 18.04 image to launch the instance,...

you should inject password to ubuntu and then launch it

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can't ssh an instance

i use a ubuntu 18.04 image to launch the instance, but after the launching i cannot ssh this instance and an error is displyed #ssh ubuntu@192.168.x.x ubuntu@192.168.x.x: Permission denied...

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