Understanding the test command
Let's now understand the
Using the test command with single brackets
Let's learn the following example to check the content or value of expressions:
$ test $name = Ganesh $ echo $? 0 if success and 1 if failure.
In the preceding example, we want to check if the content of the variable name is the same as
? To check this, we have used the
test command. The
test will store the result of the comparison in the
We can use the following syntax for the preceding
test command. In this case, we used
[ ] instead of the
test command. We've enclosed the expression to be evaluated in square brackets:
$ [[ $name = Ganesh ]] # Brackets replace the test command $ echo $? 0
During the evaluation ...
Get Learning Linux Shell Scripting now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.