Debugging Methods for Shell scripts

Debugging Methods for Shell scripts

The shell provides some options for debugging scripts, as follows:

-N

Read the command in the script but not execute it to check for syntax errors in the script

-V

Executes scripts while printing executed script commands to standard error output

-X

Provides trace execution information and prints each command and result that executes sequentially

There are three ways to use these options, one to provide parameters at the command line

$ sh-x./script.sh

The second is to provide parameters at the beginning of the script

    #! /bin/sh-x

The third method is to enable or disable parameters with the SET command in the script

    #! /bin/sh    If [-z], then      set-x      echo "Error:insufficient Args."      Exit 1      set +x    fi

The Set-x and set +x respectively indicate that the-x parameter is enabled and disabled, so that only one segment of the script can be tracked for debugging.

Debugging Methods for Shell scripts