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Showing posts from December, 2011

CentOS in Single user mode / root password reset [Default Installation]

Setting 'root' Password for Centos. Today my friend was having an issue where he was not able to set 'root' password. As the default installation had a default account without "sudo" privilege. To set the "root" password for Cent OS  Follow below steps. 1. In the grub boot menu prompt - enter "e" (for edit) to edit boot parameters. 2. Select menu this will bring up 3 or more based on the installation type. root, kernel, initrd   root (hd0,0)  kernel /vmlinuz-2.6.8-1.523 ro root=/dev/VolGroup00/LogVol00 rhgb quiet  initrd /initrd-2.6.8-1.523.img 3. Select " kernel /vmlinuz-2.6.8-1.523 ro root=/dev/VolGroup00/LogVol00 rhgb quiet " and press "e" for edit kernel /vmlinuz-2.6.8-1.523 ro root=/dev/VolGroup00/LogVol00 rhgb quiet single 4. Now add "single" at the end of the line (<space> single) as you see like the above line and press <enter> 5. Now at the boot menu enter "b" f