Terminal.app doesn't save history in El Capitan and you are using RVM

The cause is described here https://github.com/rvm/rvm/issues/3540#issue-113491283
The fix is here https://github.com/rvm/rvm/issues/3540#issuecomment-152824133

I copied the fix here just in case it's removed in the future

Another option is to create .bash_logout with a single line:

shell_session_update

Setup Debian/Ubuntu apt package cache server with Ansible

Install elnappoo.apt-cacher-ng with Ansible Galaxy and then follow the instruction in the README tab or README in the github repository. Refer to the test.yml file as an example. If you cache server doesn't have ufw running, don't forget to set apt_cacher_ng_setup_ufw: False