> I have no idea why the clock slows down in my computer (MSI mainboard), All those mainboard clocks are the cheapest you can find/build. It's perfectly normal for them to leak several minutes per week. > but here is my fix to the problem: I would merge all those lines into one: /etc/crontab: 01,11,21,31,41,51 * * * * root hwclock -s --noadjfile --localtime -- ---> doj / cubic ----> http://cubic.org/~doj -----> http://llg.cubic.org