jeffchao

ssh -t bastion -L localhost:port:remotehost:port
use jconsole, visualvm, zmc, etc.

-L [bind_address:]port:host:hostport
     -L [bind_address:]port:remote_socket
     -L local_socket:host:hostport
     -L local_socket:remote_socket
             Specifies that connections to the given TCP port or Unix socket on the local (client) host are to be forwarded to the given host and port, or Unix
             socket, on the remote side.  This works by allocating a socket to listen to either a TCP port on the local side, optionally bound to the specified
             bind_address, or to a Unix socket.  Whenever a connection is made to the local port or socket, the connection is forwarded over the secure channel,

jeffchao

docker-machine start
eval $(docker-machine env default)
docker ps

jeffchao

The full scale (which is explained) is:

10 - Wrote the book on it (there must be a book)
9 - Could have written the book, but didn't.
8 - Deep understanding of corner cases and esoteric features.
7 - Understanding and (appropriate) usage of most lesser known features.
6 - Can develop large programs and deploy new systems from scratch.
5 - Can develop/deploy larger programs/systems using all basic (w/o book) and more esoteric features (some w/ book, some without)
4 - Can develop/deploy medium programs/systems using all basic (w/o book) and a few esoteric features (w/ book). Understands enough about internals to do nontrivial troubleshooting.
3 - Can utilize basic features without much help, manage a small installation competently.

jeffchao

CREATE TABLE employees (company varchar, name varchar, age int, role varchar, primary key (company, name, age)) with clustering order by (name desc, age asc);

jeffchao

upstream foo_backend {
  server 127.0.0.1:8080;
}
 
server {
  listen 443 ssl;
  ssl_certificate /etc/nginx/ssl/foo.com.bundle.crt;
  ssl_certificate_key /etc/nginx/ssl/foo.com.key;
  ssl_ciphers RC4:HIGH:!aNULL:!MD5;
  ssl_prefer_server_ciphers on;

jeffchao

// Reset the index to the desired tree.
git reset <specific sha>

// Move the branch pointer back to the previous HEAD.
git reset --soft HEAD@{1}

git commit

git push origin master

jeffchao

# By commit hash
git for-each-ref --sort=-committerdate refs/heads/

# By name, date.
git for-each-ref --sort=-committerdate refs/heads/ --format='%(committerdate:short) %(authorname) %(refname:short)'

jeffchao

# Get a list of existing remote branches
git fetch origin

# Checkout the branch from that branch
git checkout -b branch_name origin/branch_name

git pull origin branch_name
git push origin branch_name  # yields 'Everything up-to-date'

jeffchao

rm -rf _deploy
mkdir _deploy
cd _deploy
git init
git remote add origin git@github.com:username/username.github.io.git
git pull origin master
cd ..
bundle exec rake deploy

jeffchao

Array.prototype.myinject = function () {
  var obj = Object(this);
  var base;
  var callback;

  if (arguments.length === 2) {
    base = arguments[0];
    callback = arguments[1];
  } else if (arguments.length === 1) {
    callback = arguments[0];