The fuses you want are lfuse = 0xff, hfuse = 0xc9 so try the following:
avrdude -p atmega8 -P lpt1 -c dapa -U lfuse:w:0xff:m -U hfuse:w:0xc9:m
Note: lpt1 and dapa are guesses - something tells me that the lpt1 in particular is wrong for a linux box.
I tend to use an online fuse calculator now (such as AVR® Fuse Calculator – The Engbedded Blog) rather than bend my head around the datasheet.