Bash Here documents and here strings Execute command with here document
Example
ssh -p 21 [email protected] <<EOF
echo 'printing pwd'
echo "\$(pwd)"
ls -a
find '*.txt'
EOF
$ is escaped because we do not want it to be expanded by the current shell i.e $(pwd) is to be executed on the remote shell.
Another way:
ssh -p 21 [email protected] <<'EOF'
echo 'printing pwd'
echo "$(pwd)"
ls -a
find '*.txt'
EOF
Note: The closing EOF should be at the beginning of the line (No whitespaces before). If indentation is required, tabs may be used if you start your heredoc with <<-. See the Indenting here documents and Limit Strings examples for more information.
