我的用户 bob 无法访问他（理论上拥有）的文件。我正在运行 Fedora Core 8。显示可能比告诉更容易：
> ls -al .
total 32
drwxrwxr-x 7 bob bob 4096 May 18 14:33 .
drwxrwxr-x 4 bob bob 4096 May 12 15:44 ..
drwxr-xr-x 2 bob bob 4096 June 1 14:22 log
> cd ./log
-bash: cd: log/: Permission denied
> ls -al ./log
ls: cannot access log/..: Permission denied
ls: cannot access log/the.log: Permission denied
ls: cannot access log/.: Permission denied
total 0
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