Showing posts from January, 2017

Ubuntu animated gif or screencast

Silentcast seems to be a good choice Gif has limited color palette though and are large, so mp4 or other outputs might be better when practical to embed a player. Others include LICEcap on wine Byzanz Kazam Peek

Image types - jpg, png, gif

jpg, png, and gif what are the differences jpg lossy, but smaller png no loss

Vertx Microservices Example

Vertx Microservices Store Example

State machines should be used more often

Why Develpers Never Use State Machines Unlike the author of the post, I've incorporated state machines many times in my software career because. It's probably because I started out in the hardware world. We used a lot of state machines in PALs/GALs /ASICs at Telenet/Sprint.

bash command line editing

bash productivity commands Command Recall Shortcuts Ctrl + r – search the history backwards Ctrl + g – escape from history searching mode Ctrl + p – previous command in history (i.e. walk back through the command history) Ctrl + n – next command in history (i.e. walk forward through the command history) Alt + . – use the last word of the previous command Command Control Shortcuts Ctrl + l – clear the screen Ctrl + s – stops the output to the screen (for long running verbose command) Ctrl + q – allow output to the screen (if previously stopped using command above) Ctrl + c – terminate the command Ctrl + z – suspend/stop the command Bash Bang (!) Commands Bash also has some handy features that use the ! (bang) to allow you to do some funky stuff with bash commands. !! – run last command !blah – run the most recent command that starts with ‘blah’ (e.g. !ls) !blah:p – print out the command that !blah would run (also adds it as the latest command in the command histo


semver Major.Minor.Patch Patch - backward compatible bug fix Minor - backward compatible feature addition Major - not backward compatible change


ansible-galaxy To load role projects from git into playbook roles folder Execute from roles directory ansible-galaxy install -r requirements-gitHTTPS.yml could use git protocol and ssh keys or https and username/password requirements-gitHTTPS.yml --- - src:   scm: git - src:   scm: git use boto for AWS inventory to find resources by tag pip install boto