Follow the prerequisites before the SQLCL deployment.

• Linux server with Java 17 and SQLcl version 23+ installed(added to PATH).
• Prepare placeholder.properties with all parameter.* keys used by SQL files; avoid trailing spaces in values.
• If corporate proxies are required, export http(s)_proxy/HTTP(S)_PROXY and NO_PROXY as per the environment.
• Encrypt DB credentials using salt. Keep salt and encrypted values aligned with sqlclconfig.properties.