chmod:无效模式:`+ a'
系统:(lsb_release -a) Distributor ID: Ubuntu Description: Ubuntu 10.04.4 LTS Release: 10.04 Codename: lucid 这是我的命令: sudo chmod +a "www-data allow delete,write,append,file_inherit,directory_inherit" app/cache app/logs 文件: http://symfony.com/doc/current/book/installation.html#configuration-and-setup 错误: chmod: invalid mode: `+a' Try `chmod --help' for more information. 为什么不起作用?+ a不是标准的chmod吗? 更新: 看起来这是仅OSX的mod: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/chmod.1.html