How do I debug a script in Linux?


How do I debug a script in Linux?

The debugging options available in the Bash shell can be switched on and off in multiple ways. Within scripts, we can either use the set command or add an option to the shebang line. However, another approach is to explicitly specify the debugging options in the command-line while executing the script.

How do I run a script in debug mode?

Methods of Enabling Shell Script Debugging Mode

  1. -v (short for verbose) – tells the shell to show all lines in a script while they are read, it activates verbose mode.
  2. -n (short for noexec or no ecxecution) – instructs the shell read all the commands, however doesn’t execute them.

Which command is used to debug a shell script?

Use of set builtin command Bash shell offers debugging options which can be turn on or off using the set command: set -x : Display commands and their arguments as they are executed.

What is debug mode in Linux?

A debugger is a tool that can run a program or script that enables you to examine the internals of the script or program as it runs. In the shell scripting we don”t have any debugger tool but with the help of command line options (-n, -v and -x ) we can do the debugging.

How will you debug a shell script in Unix?

How to Debug Shell Script in Unix or Linux

  1. Using the set built-in command. You can use the set command to enable the debugging of the shell script.
  2. Debug option when running the script. Another way of debugging a shell script is to specify the debug options when executing the script.
  3. Debug function.

How do I tell if a script is running in Linux?

Check running process in Linux

  1. Open the terminal window on Linux.
  2. For remote Linux server use the ssh command for log in purpose.
  3. Type the ps aux to see all running process in Linux.
  4. Alternatively, you can issue the top command or htop command to view running process in Linux.

How do I debug a code in terminal?

To view debug information on the monitor terminal, perform the following tasks:

  1. Execute the terminal monitor and terminal debugging commands.
  2. Enable the information center (enabled by default).
  3. Use a debugging command to enable the related debugging.

How do I test a Unix shell script?

On Unix-like operating systems, the test command checks file types and compares values….Expressions.

-b FILE FILE exists and is block special
-c FILE FILE exists and is character special
-d FILE FILE exists and is a directory
-e FILE FILE exists

How can I see what scripts are running?

Open Task Manager and go to Details tab. If a VBScript or JScript is running, the process wscript.exe or cscript.exe would appear in the list. Right-click on the column header and enable “Command Line”. This should tell you which script file is being executed.