1d List the contents of your home directory. It should look similar to this:
-rw-r--r-- 1 tux users 0 2006-07-14 13:34 foo.xml
-rw-r--r-- 1 tux users 0 2006-07-14 13:47 home.html
-rw-r--r-- 1 tux users 0 2006-07-14 13:47 index.html
-rw-r--r-- 1 tux users 0 2006-07-14 13:47 toc.html
-rw-r--r-- 1 tux users 0 2006-07-14 13:34 manual.pdf
-rw-r--r-- 1 tux users 0 2006-07-14 13:49 myfile1.txt
-rw-r--r-- 1 tux users 0 2006-07-14 13:49 myfile2.txt
-rw-r--r-- 1 tux users 0 2006-07-14 13:49 myfile3.txt
-rw-r--r-- 1 tux users 0 2006-07-14 13:49 myfile4.txt
-rw-r--r-- 1 tux users 0 2006-07-14 13:49 myfile5.txt
-rw-r--r-- 1 tux users 0 2006-07-14 13:32 tux.png
2 With the help of wild cards, select certain subsets of the les according to
various criteria:
2a
To list all les with the .html extension, enter
ls -l *.html
2b
To list all “versions” of myfile.txt, enter
ls -l myfile?.txt
Note that you can only use the ? wild card here because the number-
ing of the les is single-digit. As soon as you have a le named
myfile10.txt you must to use the * wild card to view all versions of
myfile.txt (or add another question mark, so your string looks like
myfile??.txt).
2c
To remove, for example, version 1-3 and version 5 of myfile.txt,
enter
rm myfile[1-3,5].txt
2d Check the result with
ls -l
Of all myfile.txt versions only myfile4.txt should be left.
You can also combine several wild cards in one command. In the example above, rm
myfile[1-3,5].* would lead to the same result as rm myfile[1-3,5].txt because
there are only les with the extension .txt available.
Shell Basics 99
