... Error\n”;;esacdone < $URLFILEfirm -f $URLFILE}Listing 9. 9 check_HTTP_server function listing. (continued)This is a nice function in Listing 9. 9 for checking the status of a Web server and alsoto ... shown in List-ing 9. 8, with the output of the query; however, the Oracle Listener is not tested as in theprevious sqlplus statement in Listing 9. 7. The sqlplus command in Listing 9. 8 shouldbe run ... variable. For shell variables you must use the shell notation here, too. Ifthe number of arguments on the command line exceeds three, then we display theusage function and exit the shell script...