You're developing a Bash script that needs to create a temporary directory, perform some operations within it, and then delete the temporary directory and its contents when done. Which command sequence ensures the secure creation and deletion of the temporary directory?1.0 Markstmp_dir="/tmp/mytempdir"mkdir $tmp_dirrm -r $tmp_dirtmp_dir=$(mktemp -d)rm -r $tmp_dirtmp_dir="/tmp/mytempdir"trap "rm -r $tmp_dir" EXITmkdir $tmp_dirtmp_dir=$(mktemp -d)trap "rm -r $tmp_dir" EXITtmp_dir="/tmp/mytempdir"mkdir $tmp_dirrm -rf $tmp_dir

The correct command sequence for securely creating and deleting a temporary directory in a Bash script is:

tmp_dir=$(mktemp -d)
trap "rm -r $tmp_dir" EXIT

Here's a step-by-step explanation:

1. tmp_dir=$(mktemp -d): This command creates a new temporary directory. The mktemp -d command creates a unique temporary directory and returns its name. The $(...) syntax is a command substitution, meaning it runs the command inside the parentheses and replaces the command with its output. So this line is creating a new temporary directory and storing its name in the tmp_dir variable.

2. trap "rm -r $tmp_dir" EXIT: The trap command allows you to specify commands that will be executed when a certain signal is received. In this case, the signal is EXIT, which is sent when the script exits for any reason. The command rm -r $tmp_dir will delete the temporary directory and its contents. So this line is setting up a trap that will delete the temporary directory whenever the script exits.