23 Nov
2001
23 Nov
'01
7:28 a.m.
On Nov 23, 14:44, Carlos Murillo wrote:
#ls
ls: not found
#vi
vi: not found
I'm no AIX expert, and I've not used it in years. I think 3.2 uses shared
libraries, and vi probably needs something in a library that's not mounted
(or not in the right place) when running the limited maintenance shell.
I'm surprised ls doesn't work, though. The shell should support ls, dd,
backup, restore, chown, mkfs, mknod, mount, and things like that. And of
course, our editor of choice: ed.
#cat /etc/mnttab
Have a look in /etc/filesystems and see what it thinks it should mount for
"mount all". I think AIX actually deletes /etc/mnttab as part of the
normal startup, and does a "touch /etc/mnttab" to leave an empty file.
#getrootfs
usage: /usr/sbin/getrootfs [-f] diskname
-f disregard status of hd5
Available disks: location:
hdisk0 00-01-00-00
#getrootfs -f hdisk0
Importing Volume Group...
rootvg
/dev/rhd4 (/): ** Unmounted cleanly - Check supressed
/dev/rhd2 (/usr): ** Unmounted cleanly - Check supressed
/usr/sbin/getrootfs: mount: not found
checking all mounts and the existance of df
/usr/sbin/getrootfs: mount: not found
/usr is not mounted
#ls
ls: not found
#mount
mount: not found
#umount
Usage: umount [-sf] {-a|-n Node|-t
Type|all|allr|Device|File|directory|File
System}
#
Further investigation revealed that if I "umount /usr", then there is
some mount executable in the ram disk. Ok, so I make /usr1, copy all
the stuff in the ramdisk /usr to /usr1 (also in ramdisk) and run
getrootfs again. Still no luck mounting /usr . So, using the tools
that I copied into /usr1 I mount /dev/hd4 in /mymnt/hd4 and /dev/hd2
in /mymnt/hd2 ; further investigation reveals that there indeed exist
directories /mymnt/hd2/bin, /mymnt/hd2/lib, /mymnt/hd4/etc and so
on; I seem to have mounted / and /usr from the HD correctly.
I still cannot use any executables in the HD, though:
#/mymnt/hd2/bin/ls
killed
typing
# cat /mymnt/hd4/etc/passwd
reveals that AIX seems to have shadow passwords but I can't find any
of the usual files (master* etc) .
Possibly in /etc/security/passwd, /etc/security/group, and so on. Don't
believe AIX is UNIX. It's not.
# passwd
cannot execute
Probably the executable isn't in your PATH. If you have the filesystems
mounted (BTW, why "mymnt" not just "mnt"? That's what mnt is for)
you can
add the relevant directories
PATH=/mymnt/hd2/bin:$PATH
but it might be better (if you just have two partitions on the hard drive)
to mount hd2 directly on /mnt, and then mount hd4 on /mnt/usr. At least
then things will be in the correct places relative to each other. There
isn't a directory called "/root", is there?
You could try the "users" command, though I expect it only works on a
normal system (ie not from the maintenacne shell, which is sort of a mini
system, like the miniroot or standalone shell in IRIX and Solaris). If you
can edit /etc/passwd with ed, you can probably remove the password field
from root's entry, leaving a null field (no
password).
--
Pete Peter Turnbull
Network Manager
University of York