====== heredoc ======

===== Suppress variable expansion =====

To do not handle ''$'' in heredoc you need to quote (''<nowiki>'</nowiki>'' or ''<nowiki>"</nowiki>'') heredoc delimiter:

<code bash>
cat > /opt/bin/startup.sh << "ENDSCRIPT"
#!/bin/sh
export LD_LIBRARY_PATH=...:$LD_LIBRARY_PATH
source /opt/bin/env.sh
/opt/bin/hello
ENDSCRIPT
</code>