Legacy Knowledge Base
Published Jul. 2, 2025

Unexpected operator and Bad substitution errors executing the patching-tool

Written By

David Tello

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Issue

  • When you try to execute the patching-tool, the following errors show up:

    $ sh ./patching-tool.sh
    patching-tool.sh: 13: [: unexpected operator
    patching-tool.sh: 13: [: unexpected operator
    patching-tool.sh: 13: [: unexpected operator
    patching-tool.sh: 22: Bad substitution

Environment

  • Liferay DXP 7.0+

Resolution

  • These errors are usually due to using a wrong command interpreter.
  • The patching-tool.sh script is written with the BASH command interpreter nomenclature, which could be incompatible with other interpreters (like DASH).
  • To execute without error the patching-tool you could use these options:
      • $ /patching-tool.sh
      • $ bash ./patching-tool.sh

Additional Information

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