Shell同時使用變量和轉義美元字符

Question

如何使用cat << _ EOF _在 shell 腳本中同時使用變量和轉義美元字符？

重要的是我沒有使用 " 或 ' 字符。

這是我要寫的文字：

cat <<- _EOF_ >> "$serverconfigdir/$siteaddress"
    This is a sample text! Here is my variable below!
    $usethisvariable

    This is another sample text! $escapethisstring show it how it looks bla bla.
_EOF_

Answer 1

您需要在第二次出現時轉義$ ：

cat <<- _EOF_ >> "$serverconfigdir/$siteaddress"
    This is a sample text! Here is my variable below!
    $usethisvariable

    This is another sample text! \$escapethisstring show it how it looks bla bla.
_EOF_