read chapter 25 in the online textbook links to an external site.. using vi, create a data file called ".addr book" in your home directory. this file is a book of contacts and should contain entries for people, businesses, etc. for example you might have an entry for ladawn: mike murphy - unix/linux instructor - email:esvoec6e0caa557e500a28c779c14aab7feb4f1b24bb23f3b7d433171452784f96919eovse note that each entry is a single line! have at least 3 entries in the file. (don't have any blank lines or any comment lines.) here is another example using generic information: firstname lastname - jobtitle - email: lastname.firstnameesvoee2d0402c074a0da467686ef48a59b7a4acf9a125545ff0b8d4bee08128158c29eovseemailserver start a session log with the script command for your command line work. you can type exit before using interactive utilities, like vi, but remember to restart your session log when you leave vi. use utilities to search for entries in your .addr book file and display them. for example, one command could lookup my entry and display it, then another command could lookup your entry and display it. if you don't already have one, create a "bin" directory within your home directory create an empty file in your bin directory called "lookup" and make it executable with appropriate permissions (so you can view or modify or execute your script). using vi, edit the file called "lookup" that you created in step 6. you will use positional parameters in this script, so make sure to review chapter 25 in the online textbook for this step. the script should perform the following tasks: display a message such as "searching for" then display the positional parameter(s) provided when the script is executed. using positional parameters, find the entry in the "$home/.addr book" file that matches the positional parameter(s) provided when the script is executed. then, display a message such as "all address book entries: " display all lines from the file in sorted order. the output must be sorted. you can sort the entire line, you are not required to sort on any specific part of the line. however, if you would like an extra challenge, try sorting on the last name.
