On 19:59 Wed 13 Dec     , Zhang Weiwu wrote:
> Hello. Recently I have replaced my old 160GB IDE harddisk with 320GB
> SATA harddisk (using PCI VT6421 IDE RAID Controller), this is what I
> did:
>      1. connect both old harddisk and new one to the PCI IDE Controller;
>      2. partition the new harddisk (because it is originally labeld as
>         MSDOS harddisk since I bought it, I partitioned it using MSDOS
>         partition table, a.k.a not sun disk label. I guess it's no
>         problem because this harddisk is not the booting harddisk);
>      3. all partitions are created in ext3, mount to /mnt
>         as /mnt/root /mnt/home etc
>      4. do "cp -avR" for each partition;
>      5. edit /etc/fstab to mount new harddisk partitions rather then old
>         harddisk;
>      6. reboot, it works, I can log as root, all services running fine
>         (including ftp etc)
>      7. remove old harddisk;
> 
> So far everything is smooth untill I found I cannot login the host
> (named sappho) as anyone other then root.
> 
> yuliansu@esmeralda:~> ssh zhangweiwu@sappho
> Password:
> Last login: Wed Dec 13 00:51:51 2006 from 218.193.55.201
> Could not chdir to home directory /home/zhangweiwu: Permission denied
> /bin/bash: Permission denied
> Connection to sappho closed.
> 
> yuliansu@esmeralda:~> ssh root@sappho
> Last login: Wed Dec 13 00:52:07 2006 from 218.193.55.201
> sappho ~ #
> 
> Strangely: it seems everybody do have permission to run /bin/bash
> 
> sappho ~ # ls -lh /bin/bash
> -rwxr-xr-x  1 root root 693K Feb  9  2006 /bin/bash
> 
> This is rather strange, such thing never happend (have permission to run
> but get "Permission denied") in my 6 years of using Linux. Can I get
> some of your suggestions? Is it because I didn't label the harddisk with
> sun disk label?
> 

Try doing:
ls -ld /

Make sure the permissions on the root directory are 755 not 700.