some general config
alias o='open '
alias ll='ls -al'
alias cls='clear'
alias df='df -H'
alias tree="find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'"
some config for Xcode
alias om='open XXXX.xcodeproj'
the ping config
alias pb='ping www.baidu.com'
alias pt='ping www.taobao.com'
alias pg='ping www.google.com'
