This document discusses shell scripting parameters and conditional tests. It defines common shell parameters like $1, $2 for individual arguments and $* for all arguments as a string. It also covers comparison operators for conditional tests like -eq for equal, -ne for not equal. An example tests if variable x equals y and prints the return value, then an if statement checks if the number of arguments is not equal to 3 and prints a message.

7. $1 The first argument
$2 Second argument
$0 The name of the script
$# The number of argument
$* The complete set of positional parameters as single string.

10. -eq Equal to
-ne Not equal to
-gt GreaterThan
-ge Greater than equal to
-lt Less than
-le Less than equal to
$ x=5; y=7;
$ test $x –eq $y; echo $?
1 Not equal
if test $# -ne 3; then
echo “You didn’t enter three arguments
else
echo “You entered correctly”
fi