The KEKB injector linac was completely upgraded for the KEKB-Factory (KEKB) project in March, 1998. Many difficulties have beenovercome during the elaborate commissioning of the upgraded linac sincethe end of 1997. The 3.5-GeV positron and 8-GeV electron beams have beeninjected to the KEKB rings with good performance. Much effort has alsobeen continuing to stabilize the intensity and quality of the beams.Some experimental results on the beam stability issues am shown togetherwith the recent operation status in this report. A beam test on a newscheme of a two-bunch injection was started in order to increase thepositron intensity since March, 2001
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