Syntax
[cmd] <<[-] delimeter [cmd] contents delimeter All contents will be passed to the cmd as an input, examples below will use EOF as a delimeter and cat as a command, you can change to whatever you want.
With Variable
cat <<EOF echo "$HOME" EOF result:
echo "/home/clavinjune" Escape Variable
Use \$ instead of $ to escape specific variable
cat <<EOF echo "$HOME" echo "\$HOME" EOF result:
echo "/home/clavinjune" echo "$HOME" Escape All Variables
Use 'EOF' instead of EOF to escape all variables
cat <<'EOF' echo "$HOME" echo "\$HOME" EOF result:
echo "$HOME" echo "\$HOME" Remove Leading Tab
Use <<- instead of << to remove leading tabs
cat <<-EOF echo "$HOME" echo "\$HOME" EOF result:
echo "/home/clavinjune" echo "$HOME" Add More Pipeline
cat <<EOF | grep june echo "$HOME" echo "\$HOME" EOF result:
echo "/home/clavinjune" Write To a File
cat <<-'EOF' > /tmp/foo echo "$HOME" echo "\$HOME" EOF result:
$ cat /tmp/foo echo "$HOME" echo "\$HOME" Thank you for reading!
Top comments (1)
so nice, thanks for sharing. expect to update~