Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 08-05-2008 Installation Manual page 374

[set]
Matches one of the characters from the group specified inside the square brackets,
which is represented here by the string set. As part of set you can also specify
character classes using the syntax [:class:], where a class is one of alnum,
alpha, ascii, etc.
Using ! or ^ at the beginning of the group ([!set]) matches one character other
than those identified by set.
Assuming that your test directory contains the files Testfile, Testfile1,
Testfile2, and datafile.
• The command ls Testfile? lists the files Testfile1 and Testfile2.
• The command ls Testfile? lists the files Testfile1 and Testfile2.
• With ls Test*, the list also includes Testfile.
• The command ls *fil* shows all the sample files.
• Use the set wild card to address all sample files whose last character is a number:
ls Testfile[1-9] or, using classes, ls Testfile[[:digit:]].
Of the four types of wild cards, the most inclusive one is the asterisk. It could be used
to copy all files contained in one directory to another one or to delete all files with one
command. The command rm *fil*, for instance, would delete all files in the current
directory whose name includes the string fil.
Viewing Files with Less and More
Linux includes two small programs for viewing text files directly in the shell: less
and more. Rather than starting an editor to read a file like Readme.txt, simply enter
less Readme.txt to display the text in the console window. Use Space to scroll
down one page. Use Page Up and Page Down to move forward or backward in the text.
To exit less, press Q .
Instead of less, you can also use the older program more. However, it is less convenient
because it does not allow you to scroll backwards.
356 Installation and Administration