Re: [gentoo-user] md5sum mismatch, upgrade from torrent, fsck

[Eric Martin]

Thufir wrote:
> I suppose I'll have to re-download the iso if the md5sum doesn't match
> (which it doesn't per <https://help.ubuntu.com/community/
> UbuntuHashes#9.04>)?  The problem is that the iso is corrupted?
>
Do the md5sums match?  If they do you downloaded the cd fine.  If not,
redownload
> thufir@arrakis:~/Desktop$
> thufir@arrakis:~/Desktop$
> thufir@arrakis:~/Desktop$ sudo mount -o loop ~/Desktop/ubuntu-9.04-
> alternate-i386.iso /media/cdrom0
> mount: wrong fs type, bad option, bad superblock on /dev/loop0,
>        missing codepage or helper program, or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
>
> thufir@arrakis:~/Desktop$  dmesg | tail
> [  461.450949] kjournald starting.  Commit interval 5 seconds
> [  461.451532] EXT3-fs warning: maximal mount count reached, running
> e2fsck is recommended
> [  461.488324] EXT3 FS on sda1, internal journal
> [  461.488342] EXT3-fs: mounted filesystem with ordered data mode.
> [  616.822097] ISO 9660 Extensions: Microsoft Joliet Level 3
> [  616.993243] ISOFS: changing to secondary root
> [  617.046821] isofs_fill_super: root inode is not a directory. Corrupted
> media?
> [  636.444512] ISO 9660 Extensions: Microsoft Joliet Level 3
> [  636.446011] ISOFS: changing to secondary root
> [  636.447168] isofs_fill_super: root inode is not a directory. Corrupted
> media?
> thufir@arrakis:~/Desktop$
> thufir@arrakis:~/Desktop$ md5sum ubuntu-9.04-alternate-i386.iso
> 1dd3245e86b89b38abb01814b05ae299  ubuntu-9.04-alternate-i386.iso
>
You need to grab the md5sum file and run md5sum -c (md5sumfile)
> thufir@arrakis:~/Desktop$
> thufir@arrakis:~/Desktop$ sudo e2fsck -yv /dev/sda1
> [sudo] password for thufir:
> e2fsck 1.41.3 (12-Oct-2008)
> /dev/sda1 is mounted.
>
What is /dev/sda1?  On most of my machines that's boot, although I won't
assume anything.  Also, I believe you can mount stuff read only via
mount -o ro,remount <mountpoint> and fsck will be *much* happier.
> WARNING!!!  Running e2fsck on a mounted filesystem may cause
> SEVERE filesystem damage.
>
> Do you really want to continue (y/n)? no
>
> check aborted.
> thufir@arrakis:~/Desktop$
>
>
> I wasn't quite sure how to run fsck without a live cd...
>
> out of curiosity, when I tried to download via the torrent the speed
> seemed exactly the same as directly downloading the iso but the progress
> was painfully slow versus directly downloading the CD (which I'll do
> again).
>
>
Torrents speeds are based on your peers and isps.  Downloads the
traditional ways are direct connections to one server.  Torrents should
be faster but ISPs throttle you quite frequently. I hope this answered
everything :)
> thanks,
>
> Thufir
>
>
-- 
Eric