Which of the following commands is used to change options and positional parameters for a running Bash?
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A. B. C. D. E.B
The correct answer is B. set.
The set command is used to modify shell options and positional parameters in a running Bash session. When called without arguments, it displays the current settings of all options. You can use the set command with various options to change the behavior of the shell.
For example, you can use the set -o command to display the current settings of all options, and the set -o <option> command to enable or disable a specific option. The -o option stands for "option".
You can also use the set command to set positional parameters. These are the arguments that are passed to a shell script or function when it is called. For example, you can use the set -- <arg1> <arg2> command to set the positional parameters to <arg1> and <arg2>.
In summary, the set command is a powerful tool for modifying shell behavior on the fly. It can be used to enable or disable shell options, set positional parameters, and more.