相关疑难解决方法(0)

我的代码有什么问题？

#!/bin/sh

LOOK_FOR="$1"

for i in `find $2 -name "*jar"`; do
  echo "Looking in $i ..."
  #jar tvf $i | grep $LOOK_FOR > /dev/null
  jar tvf "$i" | grep "$LOOK_FOR" 

  if [ $? == 0 ] ; then
    echo "==> Found \"$LOOK_FOR\" in $i"
  fi  
done #line 13

产量

wk@wk-laptop:$ sh lookjar.sh org/apache/axis/message/addressing/EndpointReference  /media/0C06E20B06E1F61C/uengine/uengine
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/build/uengine_settings.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/WebContent/uengine-web/lib/FCKeditor/WEB-INF/lib/commons-fileupload.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/WebContent/uengine-web/lib/FCKeditor/WEB-INF/lib/FCKeditor-2.3.jar ...
[: 13: 1: unexpected …

当我运行以下脚本时

#!/bin/sh
[ `whoami` == root ] || echo "must be run as root" 

我收到以下错误

./test.sh: 2: [: root: unexpected operator

我该如何避免这个错误？