Title: How to Modify Grep Command to Save Information to File and Display on Screen

Question:

How can you modify the command `grep -r key/bin/ /usr/bin/ /usr/local/bin > /tmp/key.out` to save the information to a file called `tmp/key.out` AND display it on the screen (stdout)?

Answer:

To modify the command `grep -r key/bin/ /usr/bin/ /usr/local/bin > /tmp/key.out` to save the information to a file called `tmp/key.out` AND display it on the screen (stdout), you can use the `tee` command.

Explanation:

The `grep` command is used to search for lines that contain the specified pattern (`key/bin/` in this case) in the specified files or directories (`/usr/bin/` and `/usr/local/bin` in this case).

The `-r` flag is used to perform a recursive search, meaning it will search for the pattern in all files and directories under the specified directories.

The `|` symbol is called a pipe and is used to redirect the output of one command to another command.

The `tee` command reads the output of the `grep` command and saves it to the specified file (`/tmp/key.out`) while also displaying it on the screen (stdout).

By using the `tee` command, you can both save the information to the file and display it on the screen simultaneously.