Linux cat command (as end marker)
The 'cat << EOF ' option displays end marker at the end of a file. This is called here directive and file content will be saved at the given end marker.
File can be also saved with the help of 'ctrl + d ' keys. It works same as end marker.
Note: Any word other than 'EOF' can be used for the end marker.
In the above snapshot, we have created 'exm.txt' file with 'EOF' as end marker by passing the command "cat > exm.txt << EOF".