Question

5

how to execute a string block from a file

rated 0 times [ 5] [ 0] / answers: 1 / hits: 644 / 1 Year ago, thu, march 16, 2023, 4:41:52

I have the following command saved in mat.txt file:

printf "

       _       ____            __ _

 _ __ (_)_  __/ ___|_ __ __ _ / _| |_

| '_ |  / / |   | '__/ _` | |_| __|

| | | | |>  <| |___| | | (_| |  _| |_

|_| |_|_/_/_____|_|  __,_|_|  __|





"

when I execute this file after made it executable using:

chmod +x mat.txt

It gives me an Error:

It's saying like command not found, file end reached when searching for ' & syntaxerror.

Anyone knows why?

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turhizz

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answered 1 Year ago taigysel · Accepted Answer

From man bash:

Enclosing characters in double quotes preserves the literal
value of all characters within the quotes, with the exception of $,
`, , and, when history expansion is enabled, !.

In other words, " ... " is not sufficient to protect the unbalanced backtick on line 4 of your text; the shell is interpreting it as the start of a command substitution.

OTOH you can't use single quotes, because your text contains single quotes.

I'd suggest avoiding the issue of quoting altogether by using a here document. You should also use a shebang to make sure your file is interpreted by the intended shell. So:

#!/bin/sh



cat <<'TXT'

       _       ____            __ _

 _ __ (_)_  __/ ___|_ __ __ _ / _| |_

| '_ |  / / |   | '__/ _` | |_| __|

| | | | |>  <| |___| | | (_| |  _| |_

|_| |_|_/_/_____|_|  __,_|_|  __|





TXT

then

$ ./mat.txt

       _       ____            __ _

 _ __ (_)_  __/ ___|_ __ __ _ / _| |_

| '_ |  / / |   | '__/ _` | |_| __|

| | | | |>  <| |___| | | (_| |  _| |_

|_| |_|_/_/_____|_|  __,_|_|  __|