Just use ‘EOF’ to prevent the variable from expanding: sudo /bin/su -c “cat << ‘EOF’ > /etc/init.d/my-script # ^ ^ From man bash: Here Documents This type of redirection instructs the shell to read input from the current source until a line containing only delimiter (with no trailing blanks) is seen. All of the lines … Read more
You only need a minimal change; single-quote the here-document delimiter after <<. cat <<‘EOF’ >> brightup.sh or equivalently backslash-escape it: cat <<\EOF >>brightup.sh Without quoting, the here document will undergo variable substitution, backticks will be evaluated, etc, like you discovered. If you need to expand some, but not all, values, you need to individually escape … Read more
The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg. when assigning multi-line string to a shell variable, file or a pipe. Examples of cat <<EOF syntax usage in Bash: 1. Assign multi-line string to a shell variable $ sql=$(cat <<EOF SELECT foo, bar FROM db WHERE foo=’baz’ EOF ) … Read more
Read the Advanced Bash-Scripting Guide Chapter 19. Here Documents. Here’s an example which will write the contents to a file at /tmp/yourfilehere cat << EOF > /tmp/yourfilehere These contents will be written to the file. This line is indented. EOF Note that the final ‘EOF’ (The LimitString) should not have any whitespace in front of … Read more
The EOF token must be at the beginning of the line, you can’t indent it along with the block of code it goes with. If you write <<-EOF you may indent it, but it must be indented with Tab characters, not spaces. So it still might not end up even with the block of code. … Read more
Creating multiline strings in JavaScript