What could cause my SSH passphrase to fail on my AWS VM but work fine on my Mac laptop, for the exact same keypair? See below (blank lines added for clarity). Passphrase was copy/pasted so is identical, no typos involved.
320 ~/.ssh$ uname -a
Darwin mbp.local 19.6.0 Darwin Kernel Version 19.6.0: Thu May 6 00:48:39 PDT 2021; root:xnu-6153.141.33~1/RELEASE_X86_64 x86_64
321 ~/.ssh$ ssh-keygen -y -f md.id_rsa
Enter passphrase:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQDHR9AEY2NOLQBVM5uUAMsKMm2XUXnUoiESGvLTJ7tte86JUI8ZZVDmGxrlP
[snip]
322 ~/.ssh$ scp md.id_rsa md.id_rsa.pub AWS:.ssh
md.id_rsa 100% 2655 44.0KB/s 00:00
md.id_rsa.pub 100% 570 9.0KB/s 00:00
323 ~/.ssh$ ssh AWS
Last login: Fri Jul 30 11:56:36 2021 from 10.50.30.167
421 AWS:~$ cd .ssh
422 AWS:~/.ssh$ uname -a
Linux AWS.xyz.com 2.6.32-754.35.1.el6.x86_64 #1 SMP Sat Nov 7 12:42:14 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
423 AWS:~/.ssh$ ssh-keygen -y -f md.id_rsa
Enter passphrase:
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