Linux vendor Red Hat Inc. closed one office in the United States and two in Europe last week as it tries to deal with overlaps in personnel caused by the company's numerous acquisitions made this year. First on the chopping block, Red Hat's San Francisco office is shutting its doors and laying off seven of the 20 people employed there. Those who retained their positions will have the option to work remotely or in other California offices in nearby Oakland and Sunnyvale, a spokeswoman said. The company also plans to close its Newbury, England, office and relocate all the workers to another office nearby. In addition, an office in Cagnes-sur-Mer, France, will shut down, with employees heading to Red Hat's Paris locale.