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Sentence in blue , Help me to understand .

zerol

Soul of New Machine

发贴: 593

于 2003-11-27 17:26

这是从Solaris Administration 教程中摘录的，章节是"File Permissions"

All access permissions have been removed, except for the directory indicator on the special file test. Note the main difference between setting files using symbolic codes rather than octal codes: Symbolic codes are relative, numeric codes are absolute. This means that unless you explicitly revoke a file permission when setting another using symbolic codes, it will persist. Thus, if a file already has group write access, and you grant group execute access (or remove group execute access), the write access permission is not removed. However, if you specify only group execute access using an octal code, the group write access will automatically be removed if it has been previously set.

Tip
You may well find that in startup scripts and situations where the permissions are unknown in advance, using octal codes is safer.

EXAM TIP You must be able to interpret every element of an octal permissions code.

★☆　The Truth Lies Somewhere In The Middle　☆★　

作者

Re:Sentence in blue , Help me to understand . [Re:zerol]

dorrenchen

发贴: 298

于 2003-11-28 03:15

You may well find that in startup scripts and situations where the permissions are unknown in advance.

modified: You may often find that some startup scripts and in other situations where the permissions are unknown in advance.

你会时常发现有些启动文件和在其他情况下,预先你不知道文件的许可权。

ok, that's the translation. But I don't get it, you can check the file permission at any time by doing "ls -l" at command prompt.

You sure study a lot.

作者	Re:Sentence in blue , Help me to understand . [Re:zerol]
zerol Soul of New Machine 发贴: 593	于 2003-11-28 09:50 I got it ! >You sure study a lot. I just keep on read news on theserver.com everyday and some ebooks. ^^ ★☆　The Truth Lies Somewhere In The Middle　☆★

作者

Re:Sentence in blue , Help me to understand . [Re:zerol]

floater

Java Jedi

总版主

发贴: 3233

于 2003-11-28 12:25

在有些启动文件(zhong)(or in chinese)预先你不知道文件的许可权的情况下, using octal codes is safer.

There are two cases:
1. in the startup scripts
2. when the permissions are unknown in advance.
In these two cases, it's safer to set the permission absolutely.

In some cases, you don't have the permission to run ls -l, so you can't find out the permission.

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."
- Martin Fowler, Refactoring - Improving the Design of Existing Code

作者	Re:Sentence in blue , Help me to understand . [Re:zerol]
tom1973 发贴: 0	于 2003-11-29 19:13 1.startup scripts 2.situations where the permissions are unknown in advance

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