What does the number 2 denote in the command tail -c2 /tmp/hello?

In the command tail -c2 /tmp/hello, the number 2 denotes the number of bytes to display from the end of the file /tmp/hello.

Breakdown of the Command

• tail: This is the command used to display the last part of a file.
• -c: This option specifies that you want to display a certain number of bytes instead of lines.
• 2: This indicates that you want to see the last 2 bytes of the file.
• /tmp/hello: This is the path to the file from which you want to display the last 2 bytes.

Example

If the contents of /tmp/hello are:

Hi,
I am Labby!

Running the command:

tail -c2 /tmp/hello

Would output:

!

This shows the last 2 bytes of the file, which in this case is the exclamation mark at the end of the sentence.

If you have any more questions or need further clarification, feel free to ask!