If new machinery is being installed in a factory and some existing employees are fired due to lack of knowledge of machinery's operating procedure, then what kind of unemployment will it be called?

Structural unemployment

Structural unemployment is that unemployment which is caused by a mismatch between the skills that workers in the economy can offer, and the skills demanded of workers by employers. Structural unemployment is often brought about by technological changes that make the job skills of many workers obsolete. In the above question, all the workers which were unable to deal with the technological change were fired.