function::user_long_error - Linux


user_long_error is a Linux utility used for testing the handling of user-generated long error messages. It intentionally creates an error message that is longer than the standard length Limit and allows users to observe how the system responds to such errors.


user_long_error [--length <length>] [--file <file>]


  • –length : Specify the length of the generated error message. Defaults to 1024 characters.
  • –file : Write the error message to the specified file instead of the standard error output.


  • Generate a long error message and print it to the standard error output:

  • Generate a long error message with a custom length:

    user_long_error --length 2048
  • Generate a long error message and write it to a file:

    user_long_error --file /tmp/error.txt

Common Issues

  • Error message cutoff: If the generated error message exceeds the system’s limit, it may be truncated.
  • System resources: Generating very long error messages can consume significant system resources, potentially affecting the system’s performance.


user_long_error can be used in conjunction with other tools for testing purposes:

  • logger: Log the generated error message to the system log.
  • stress: Stress test the system’s error handling capabilities by repeatedly generating long error messages.

Related Commands

  • logger
  • syslog
  • stress