Sams Teach Yourself Shell Programming in 24 Hours, Second Edition

Questions

1:	Add a check to the sshd init script that verifies if the user is root. (Init scripts should only be executed by root). HINT: Use the id and sed commands.
2:	The showperson script lists all matching entries in the address book based on a name provided by the user. The matches produced are case sensitive. How can you change the script matches so they aren't case sensitive?
3:	Both the showperson and delperson scripts reproduce the following code PATH=/bin:/usr/bin # check that a name is given if [ $# -lt 1 ] ; then printUSAGE "`basename $0` name" exit 1 fi # check that the address book exists MYADDRESSBOOK="$HOME/addressbook" if [ ! -f "$MYADDRESSBOOK" ] ; then printERROR "$MYADDESSBOOK does not exists, or is not a file." exit 1 fi