At work, we recently standardised on Amazon Linux 2 for several reasons. One of which was to take advantage of EC2 instance connect so we no-longer have a public key distribution problem, and can grant SSH access using IAM. I initially wrote a quick shell script to create and use…
Quite often you'll find yourself needing to know the region your instance resides in. I've seen this done a couple of ways: $ curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e 's/\([1-9]\).$/\1/g' This is pretty ugly, so I prefer to use this method…
Recently at work we were trying to find out exactly what query was running that was causing an exception in our application. Fortunately, this was quick and easy using good old tcpdump: # tcpdump -A -nn -s 0 \ "tcp dst port 9200 and \ (((ip[2:2] - ((ip[0]&0xf)…