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Subject:
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Wrong teaching on shell conditions
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Posted By:
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aminm
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Post Date:
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4/3/2005 11:49:39 AM
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On page 32 on shell conditions the authors suggest that the trailing ] is also added just for readability. This is wrong and an opening '[' must be followed by a closing one ']'. Following the discussion, a weird example is added:
ls -l /usr/bin [
which makes no sense at all and just produces an error message that the file '[' was not found!
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Reply By:
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jaymz
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Reply Date:
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10/1/2005 6:33:14 AM
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this is not wrong. you have an extra space in your command. try it with no space between the slash and bracket:
--- cut ---
# ls -l /usr/bin/[
-rwxr-xr-x 1 root root 22132 Aug 6 23:36 /usr/bin/[
--- cut ---
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Reply By:
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buckersher
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Reply Date:
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9/27/2006 9:45:57 AM
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Aminm:
The command "ls -l /usr/bin/[" is not an example at all of using the open bracket. The author is just proving that the close bracket is not needed by showing that the '[' is merely a symlink to the test command.
Murdock
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