[ug-bosug] Mounting a Solaris partition

[Pavan T C]

Pavan T C wrote:
> Sriram Narayanan wrote:
> 
>> Hi all:
>>
>> My friend Sandeep (whom I've CC'd on this mail, and who'll be joining
>> BoSUG soon) has a problem. At his office, they have an x86 box
>> containing Sun One, and the person who'd configured the root password
>> has left. He needs to reset that password (and I can vouch for him,
>> he's a sysadmin I've known for years :) ).
>>
>> Here's what I told him.
>> 1. Download Belenix
>> 2. Use fdisk to find the root partition.
>>     fdisk -l /dev/rdsk/c0d0p0
> 
> 
> There is no "fdisk -l" in solaris. You just have to do fdisk <raw device>.
> 
> AFAIK, Belenix would already have mounted the solaris partition (I'm not 
> sure about the mount point, though). You can check the system log, or 
> just use "mount" to see the mounted partitions.
> 
>>     Mostly the partition would be /dev/rdsk/c0d0s2
>> 3. Mount the partition at /mnt/s2
>>     mount /dev/rdsk/c0d0s2 /mnt/s2
> 
> 
> /dev/rdsk/cNdNs2 is the device node that represents the entire solaris 
> partition (even though the nomenclature has 's' in it, which stands for 
> slice. Actually, it *is* a slice which spans the entire partition) You 
> would not find a filesystem on this straight away. You would need to 
> figure out which of the slices in this partition has the root file 
> system and then mount *that* slice as ufs.
> To verify, try fstyp /dev/rdsk/c0d0s2, and see if you get a sensible 
> output.
> So, one of the cNdNs[1,3,4,5,6,7] would be the potential root slices.

Sorry, add 0 to the possible list of slices. So list now is 
[0,1,3,4,5,6,7]. Actually, s0 would most probably be your root slice.

Pavan
> Once you have mounted the root slice, you can try the different ways 
> mentioned in the thread to change the root password.
> 
> Pavan
> 
>> 4. Edit /mnt/s2/etc/shadow and knock off the entry for root
>> 5. Reboot the box off the hard disk, and log on as root without having
>> to enter any password.
>>
>> Questions:
>> 1. Are the instructions given above correct ?
>> 2. Does he need to provide an argument to the mount command for the
>> file system type ?
>>
>> -- Sriram
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