gsh tries, when an error occurs, to output an informative error message that will lead you to the solution of your problem. This appendix documents all gsh error messages and what the probable cause of the problem might be. There are five classes of errors: generic gsh, command-entry, syntax, execution, and builtin. Each error is discussed separately.
These errors can typically occur at any time and may not be directly related to something the user has done. Some of them are trivial, and some are very serious and should be reported immediately via the GNOBugs web page.
All stopped jobs must be killed before exiting the shell. Use the jobs and kill commands.