root@install:~# ee stack install Adding Dotdeb NGINX repository, please wait... Adding Dotdeb PHP5.5 repository, please wait... Adding Percona repository, please wait... gpg: [stdout]: write error: Broken pipe gpg: iobuf_flush failed on close: file write error [ Tue Nov 11 12:23:29 UTC 2014 ] Unable to add Percona GnuPG key, exit status = 127
Hi, I think, yo don’t have installed sudo application that is why you are getting this error. Try following
apt-get install sudo ee stack install
It’s been a long time, and we haven’t heard from you. It looks like your issue is resolved.
I am closing this support topic for now. Feel free to create a new support topic if you have any queries further.