The use of test in the shell

#/secondin/secondfirstsh
echo "Please enter the Numseconder"
Read First
Read Second
if test $first-eq $second
Then echo "The No.2″"
Elif Test $first-GT $second//Determine if it is greater than
Then echo "The No.2″ >

else echo "No.2″ <
Fi
Example 2. Find out if the file exists under the/root/directory
#/secondin/secondfirstsh
echo "Enter first file Nfirstme:"
Read First
if test-e/root/$first //E represents the existence of this file
Then echo "The file is exist!"
else echo "The file is not exist!"
Fi

The use of test in the shell