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pkaramol
Asked: 2014-06-06 02:41:58 +0800 CST

Ubuntu 中的 Joomla 文件/文件夹权限

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在 joomla 根目录中设置文件和文件夹权限的推荐方法如下（来自 help.ubuntu 网站）

cd /var/www/joomla/
sudo find . -type f -exec chmod 644 {} \;
sudo find . -type d -exec chmod 755 {} \;

谁能解释一下上面两个 chmod 语句中 {} 和 \ 的用途？

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1 个回答

  1. Best Answer

    该find命令返回一个文件列表，-exec参数对每个列出的文件执行该命令chmod 644。括号允许用户指定在命令中使用列出的文件名的位置...

    the\;用于指定命令的结尾（在本例中为chmod命令的结尾）

    看man find：

       -exec command ;
      Execute  command;  true  if 0 status is returned.  All following
      arguments to find are taken to be arguments to the command until
      an  argument  consisting of ';' is encountered.  The string '{}'
      is replaced by the current file name being processed  everywhere
      it occurs in the arguments to the command, not just in arguments
      where it is alone, as in some versions of find.  Both  of  these
      constructions might need to be escaped (with a '\') or quoted to
      protect them from expansion by the shell.  See the EXAMPLES sec-
      tion  for examples of the use of the '-exec' option.  The speci-
      fied command is run once for each matched file.  The command  is
      executed  in  the  starting  directory.    There are unavoidable
      security problems surrounding  use  of  the  -exec  option;  you
      should use the -execdir option instead.

    http://unixhelp.ed.ac.uk/CGI/man-cgi?find

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