Glauber “glommer” Costa says guestfish is “the most kicking ass software ever”. Cheers Glauber. I wrote virt-rescue for glommer because he wanted to “fsck” interactively to fix his broken virtual machine. Libguestfs wasn’t designed for making ad-hoc interactive changes, but glommer gave me the idea that we could reuse the libguestfs appliance quite easily to make an interactive rescue shell for virtual machines, analogous to the rescue CDs that are common for physical machines. And so virt-rescue came about.
The not so good one appeared in SearchEnterpriseLinux.com and is little more than blogspam, and I speak as someone who used to write similar trash (it’s very attractive to Google, and before Red Hat I used to work in SEO). I don’t think the author actually tried guestfish or libguestfs, it seems he just copied stuff out from our manpages. I doubt SearchEnterpriseLinux care since it is my opinion that they exist to make widely syndicated spam articles just to attract page views by misleading users of search engines.