steps to clean up excessive launch configs

commands on the shell

$ sudo apt-get install awscli
$ aws configure
$ aws autoscaling describe-launch-configurations | grep LaunchConfigurationName | cut -d '"' -f4 > all_lcs
$ aws autoscaling describe-auto-scaling-groups | grep LaunchConfigurationName | cut -d '"' -f4 | sort -u > used_lcs
$ ./delete.py > delete_lcs
$ for i in `cat delete_lcs`; do aws autoscaling delete-launch-configuration --launch-configuration-name ${i}; done

delete.py

#!/usr/bin/env python2.7

in_use=[]

with open("./used_lcs") as fd:
    for lc in fd.readlines():
        in_use.append(lc.strip())

to_remove=[]

with open("./all_lcs") as fd:
    for lc in fd.readlines():
        lc = lc.strip()
        if lc not in in_use:
            to_remove.append(lc)

for lc in to_remove:
    print lc