下面的命令可以实现只能往/var/log/messages里面追加数据，但不能删除的功能。 chattr +a /var/log/messages
下面的命令可以实现只能往/var/log/messages里面追加数据，但不能删除的功能。 chattr +a /var/log/messages
参考答案和解析
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