Linux结构化命令(四)——case命令

case variable inpattern1 | pattern2) commands1;;pattern3) commands2;;*) default commands;;esac

#！/bin/bashcase $USER inroot | ait)    echo "wlecome $USER"    echo "Please enjoy your visit";;oracle | dmhs)    echo "Hi,$USER"    echo "We are glad you could join us";;aaa)    echo "Please log out when done with aaa";;*)    echo "Sorry,you are not allowed here";;esac