Search-and-replace is a capability that allows a computer
user to find a given sequence of characters in one or more text files
and, if desired, replace the sequence with another sequence of characters.
A global search-and-replace means that the replace is to take effect in
all files within the context of the search.
In Unix and some other operating systems, a grep command or utility can
be used to do search-and-replace. In Windows operating systems, a popular
product that provides a graphical user interface is called Search and
Replace for Windows 95/NT.
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