Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION User Manual download pdf (Page 277)

17.4 Identifying and Working with File Types 265

sneakers.txt

You’ll probably use the asterisk (*) most frequently when you’re searching. The asterisk will search

out everything that matches the pattern you’re looking for. So even by typing:

ls *.txt

or:

ls sn*

you’d ﬁnd sneakers.txt – except that as time goes on, there will be more text ﬁles, and they’ll all

show up because they match the pattern you’re searching for.

Ithelps,then,tonarrowyoursearchasmuchaspossible.

One way to narrow the search might be to use the question mark symbol (?). Like the asterisk, using

? can help locate a ﬁle matching a search pattern.

In this case, though, ? is useful for matching a single character – so if you were searching for

sneaker?.txt,you’dgetsneakers.txt as a result – and/or sneakerz.txt, if there were such

a ﬁlename.

When an asterisk, for example, just happens to be part of a ﬁlename, such as might be the case if the

ﬁle sneakers.txt was called sneak*.txt,that’s when regular expressions can come in handy.

Regular expressions are more complex than the straightforward asterisk or question mark.

Using the backslash (\), you can specify that you don’twanttosearchouteverything by using the

asterisk, but you’re instead looking for a ﬁle with an asterisk in the name.

If the ﬁle is called sneak*.txt, then, type:

sneak\*.txt

Here is a brief list of wildcards and regular expressions:

* – Matches all characters

? – Matches one character in a string (such as sneaker?.txt)

\* – Matches the * character

\? – Matches the ? character

\) – Matches the ) character

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Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION User Manual Page 277