$./$greetings$4$c$.$sh

$./$greetings$4$c$.$sh: line $2$: $$\text{'}\backslash$r$\text{'}$: command not found

Enter a file name in the pattern firstname$\_$lastname.usr:

$\text{'}$: not a valid identifier read: $`$file$\_$name

$./$greetings$4$c$.$sh: line $5$: $$\text{'}\backslash$r$\text{'}$: command not found

$./$greetings$4$c$.$sh: line $12$: syntax error near unexpected token $`$fi$\text{'}$

$./$greetings$4$c$.$sh: line $12$: $`$fi$\text{'}$