Bash Shell Scripting- Exit Status of a Command

The video tutorial explains the concept of exit status in Linux commands, which indicates whether a command was executed successfully or failed. A status of zero means success, while a non-zero status indicates an error. The tutorial demonstrates how to check the exit status using the $? variable and how to store it in a custom variable. It provides practical examples, such as searching for a file and understanding common exit codes like 127 for command not found and 1 for execution errors.

What does an exit status of zero indicate in Linux commands?

• The command usage was incorrect.

• The command was executed successfully.

• The command was not found.

• The command was executed with errors.

How can you check the exit status of the last executed command in Linux?

• By using the command '$?'.

• By using the command 'status check'.

• By using the command 'status $?'.

• By using the command 'exit status'.

What does a non-zero exit status indicate?

• The command was executed twice.

• The command was not executed.

• The command was executed with an error.

• The command was executed successfully.

How can you store the exit status of a command into a variable?

• By using 'var = $?'.

• By using 'exit $?'.

• By using 'status = $?'.

• By using 'code = $?'.

What does an exit status of '127' signify?

• Command executed successfully.

• Command not found.

• Command executed with warnings.

• Command usage was incorrect.

If a command returns an exit status of '1', what does it mean?

• The command was not found.

• The command executed successfully.

• The command was valid but failed during execution.

• The command usage was incorrect.

What does an exit status of '2' indicate?

• Incorrect command usage.

• Command executed successfully.

• Command not found.

• Command executed with warnings.