May 2000
Beginner
761 pages
18h 20m
English
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9.9. Debugging
By using the -n option to the bash command, you can check the sytnax of your scripts without really executing any of the commands. If there is a syntax error in the script, the shell will report the error. If there are no errors, nothing is displayed.
The most commonly used method for debugging scripts is the set command with the -x option, or bash, invoked with the -x option, and the scriptname. See Table 9.7 on page 465 for a list of debugging options. These options allow an execution trace of your script. Each command from your script is displayed after substitution has been performed, and then the command is executed. When a line from your script is displayed, it is preceded with a plus (+) sign.
With the verbose option turned ...
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