

The best documents would be birth certificates for each generation, but there was a massive fire at the Dublin records office in 1922, which destroyed a lot of genological records from before then. If you have any information about where in Ireland your great grandparents were from, you may be able to find local records however. Things like parish registers and birth records for sone denominations were stored outside Dublin, so you may be able to find them, although it’ll probably mean going there, or hireing to go there, as most of those records haven’t been digitised.







The general process would look something like:
You’ll need to perform the following steps for each SSH key you are replacing:
old_id_rsaandold_id_rsa.pub(obviously use the same type name as your key, just prefixold_)~/.ssh/config, add a line telling SSH to use the old key as well as the new ones:IdentityFile ~/.ssh/old_id_rsa(change the key filename as aporopriate)ssh-keygen -t ed25519~/.ssh/id_ed25519.pubkey to theauthorized_keysfile or equivalent mechanism. Do not remove the old public key yet.IdentityFileline from your~/.ssh/configauthorized_keysfile on each server you log in to.Depending on your threat model you’re going to want to do this more or less often, and so you may want to consider automating it with sonething like
ansibleif it’ll be a regular job.