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Chapter 5. Command Line Tools
This section describes the behavioral changes of command-line tools in Red Hat Enterprise Linux 6.
The behavior of the
grepcommand has changed with regards to searching for upper and lower case strings. Using interval searching in the [a-z] format is dependent on the LC_COLLATE variable.
You can set
LC_COLLATE=Cto preserve old behavior and to achieve proper results when performing interval searching with this method; however, in Red Hat Enterprise Linux 6, the recommended way of interval searching is to use the [[:lower:]],[[:upper:]] format.
This change can significantly affect output, so scripts and processes must be reviewed to continue to achieve the correct results.