So was carrying out a security audit and came across an SSH key pair that had been setup without a password. Easy to fix just run this command on the file,

ssh-keygen -p -f keyfile

and it will ask you for the new password. If the key permissions are setup strictly you may find the command fails when it attempts to write the new file, in which case sudo the command as that way the file permission will remain unchanged.

Discovered this today,

M-x string-insert-rectangle

Just awesome allows you to modify multiple lines at the same time, ideal for covernting yaml tags to liquid tags. Such as,

---
layout:
---

to

{}

Emacs rocks!!

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