Sams Teach Yourself Shell Programming in 24 Hours, Second Edition

Questions

1:	What is the difference between the following commands? if [ -e /usr/local/bin/bash ] ; then /usr/local/bin/bash ; fi if [ -x /usr/local/bin/bash ] ; then /usr/local/bin/bash ; fi
2:	Given the following variable declarations, HOME=/home/ranga BINDIR=/home/ranga/bin what is the output of the following if statement? if [ $HOME/bin = $BINDIR ] ; then echo "Your binaries are stored in your home directory." fi
3:	Write a test command that can be used to test if /usr/bin is a directory or a symbolic link.
4:	Given the following if statement, write an equivalent case statement: if [ "$ANS" = "Yes" -o "$ANS" = "yes" -o "$ANS" = "y" -o "$ANS" = "Y" ] ; then ANS="y" else ANS="n" fi