if for case 及多参数同时传递

#!/bin/bash
case $ in
'start')
        echo "start server..."
        ;;
'stop')
        echo "stop server..."
        ;;
'restart')
        echo "restart server..."
        ;;
'status')
        echo "runing..."
        ;;
*)
        echo "./`basename $0` {start|stop||restart|status} "
        ;;
esac
~

同时接收多个参数

#!/bin/bash
#
DEBUG=
ADD=
DEL=

for I in `seq  $#`; do
  if [ $# -gt  ]; then
      case $ in
      -v|--verbose)
        DEBUG=
        shift ;;
      -h|--help)
        echo "Usage: `basename $0` --add USER_LIST --del USER_LIST -v|--verbose -h|--help"
        exit
        ;;
      --add)
        ADD=
        ADDUSERS=$
        shift 2  #shift 是踢掉变量的值
        ;;
      --del)
        DEL=
        DELUSERS=$
        shift
        ;;
      *)
        echo "Usage: `basename $0` --add USER_LIST --del USER_LIST -v|--verbose -h|--help"
        exit
        ;;
    esac
  fi
done

if [ $ADD -eq  ]; then
  for USER in `echo $ADDUSERS | sed 's@,@ @g'`; do
    if id $USER &> /dev/null; then
      [ $DEBUG -eq  ] && echo "$USER exists."
    else
      useradd $USER
      [ $DEBUG -eq  ] && echo "Add user $USER finished."
    fi
  done
fi

if [ $DEL -eq  ]; then
  for USER in `echo $DELUSERS | sed 's/\,/\ /g'`; do
    if id $USER &> /dev/null; then
      userdel -r $USER
      [ $DEBUG -eq  ] && echo "Delete $USER finished."
    else
      [ $DEBUG -eq  ] && echo "$USER not exist."
    fi
  done
fi