HungYuHei

查看系统提供的JDK版本信息
$ /usr/sbin/alternatives --config java

配置SunJDK
# /usr/sbin/alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_27/bin/java 2
# /usr/sbin/alternatives --config java

HungYuHei

.replace {
  display:block;
  height:0;
  overflow:hidden;
  font-size:0;
  letter-spacing:-1em;
  text-indent:-1000em;
}
.heading {
  width:135px;

HungYuHei

def generate_password(length=6)
  chars = 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ23456789'
  password = ''
  length.times { |i| password << chars[rand(chars.length)] }
  password
end

HungYuHei

gem install bundler --pre
gem install mongoid bson_ext haml heroku rb-inotify libnotify guard-livereload mini_magick carrierwave carrierwave-mongoid client_side_validations

HungYuHei

gem list | cut -d" " -f1 | xargs gem uninstall -aIx

HungYuHei

@foo.current_page
@foo.num_pages
@foo.limit_value
@foo.total_count
@foo.last_page?
@foo.first_page?
@foo.num_pages

HungYuHei

// top-level namespace being assigned an object literal  
var myApp = myApp || {};  
// a convenience function for parsing string namespaces and  
// automatically generating nested namespaces  
function extend( ns, ns_string ) {  
    var parts = ns_string.split('.'),  
        parent = ns,  
        pl, i;  
    if (parts[0] == "myApp") {  
        parts = parts.slice(1);  

HungYuHei

cat ~/.ssh/id_dsa.pub | ssh me@remotebox "cat >> ~/.ssh/authorized_keys"

HungYuHei

/System/Library/CoreServices/Dock.app/Contents/Resources

HungYuHei

# place it in /etc/openvpn/server.conf

port 53
proto udp
dev tun

ca /etc/openvpn/ca.crt
cert /etc/openvpn/server.crt
key /etc/openvpn/server.key
dh /etc/openvpn/dh1024.pem