Create or Update test.txt

To create or update the test.txt file using the following command:

$ cat << EOF > test.txt
  This is the first line.
  This is the second line.
  EOF

Explanation:

• The cat << EOF > test.txt command creates (or updates if the file already exists) a file named test.txt and writes the specified content into it.
• Everything between EOF and the second EOF is written into the file.
• This command adds two lines to test.txt:
  • "This is the first line."
  • "This is the second line."

After running this command, your test.txt file will contain the following:

This is the first line.
This is the second line.