I installed fedora, slackware in a same system. During installation, I accidentally configured the date as 29/4/2011 instead of 26/4/2011. After installing both distros, In fedora I found the wrong date and corrected that. but, after that when I boot the slackware, it says, "problem in mounting root partation." . and before to that there was a message, indicating the that, distro was installed on 29/4/2011 but, now date is 27/4/2011. Slackware refused to boot. Same story with same error message with fedora too. Then I changed the date in CMOS, both distros are working fine now. How can I change the date now? In which place the distro installed date get stored?