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<td width="66%" height="25"><strong>如何使用组合命令(Compound Command)数</strong></td>
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<td height="50" colspan="2" class="main_ArticleTitle" style="word-break:break-all;Width:fixed">如何使用组合命令(Compound Command)数</td>
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<td colspan="2">作者:<a href='http://www.77169.com/ShowAuthor.asp?ChannelID=1010&AuthorName=不详' title='不详'>不详</a> 文章来源:<a href='http://www.77169.com/ShowCopyFrom.asp?ChannelID=1010&SourceName=来自 Internet'>来自 Internet</a> 点击数:
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更新时间:2003-11-2</td>
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1、&
<P>Usage:第一条命令 & 第二条命令 [& 第三条命令...]</P>
<P>用这种方法可以同时执行多条命令,而不管命令是否执行成功</P>
<P>Sample:<BR>C:\>dir z: & dir c:\adam<BR>The system cannot find the path specified.<BR>Volume in drive C has no label.<BR>Volume Serial Number is 0078-59FB</P>
<P>Directory of c:\adam</P>
<P>2002-05-14 23:51 <DIR> .<BR>2002-05-14 23:51 <DIR> ..<BR>2002-05-14 23:51 14 sometips.gif</P>
<P>2、&&</P>
<P>Usage:第一条命令 && 第二条命令 [&& 第三条命令...]</P>
<P>用这种方法可以同时执行多条命令,当碰到执行出错的命令后将不执行后面的命令,如果一直没有出错则一直执行完所有命令;</P>
<P>Sample:<BR>C:\>dir z: && dir c:\adam<BR>The system cannot find the path specified.</P>
<P>C:\>dir c:\adam && dir z:<BR>Volume in drive C has no label.<BR>Volume Serial Number is 0078-59FB</P>
<P>Directory of c:\adam</P>
<P>2002-05-14 23:55 <DIR> .<BR>2002-05-14 23:55 <DIR> ..<BR>2002-05-14 23:55 14 sometips.gif<BR>1 File(s) 14 bytes<BR>2 Dir(s) 768,671,744 bytes free<BR>The system cannot find the path specified.</P>
<P>在做备份的时候可能会用到这种命令会比较简单,如:<BR>dir file://192.168.0.1/database/backup.mdb && copy file://192.168.0.1/database/backup.mdb E:\backup<BR>如果远程服务器上存在backup.mdb文件,就执行copy命令,若不存在该文件则不执行copy命令。这种用法可以替换IF exist了 :)</P>
<P>3、||</P>
<P>Usage:第一条命令 || 第二条命令 [|| 第三条命令...]</P>
<P>用这种方法可以同时执行多条命令,当碰到执行正确的命令后将不执行后面的命令,如果没有出现正确的命令则一直执行完所有命令;</P>
<P>Sample:<BR>C:\adam>dir sometips.gif || del sometips.gif<BR>Volume in drive C has no label.<BR>Volume Serial Number is 0078-59FB</P>
<P>Directory of C:\adam</P>
<P>2002-05-14 23:55 14 sometips.gif<BR>1 File(s) 14 bytes<BR>0 Dir(s) 768,696,320 bytes free</P>
<P>组合命令使用的例子:<BR>sample:<BR>@copy trojan.exe \\%1\admin$\system32 && if not errorlevel 1 echo IP %1 USER %2 PASS %3 >>victim.txt</P>
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