Failed to install ipkg

[Galleons]

I got the following error when I try to install ipkg.

[admin@(none) /opt]$ ipkg.sh install ipkg

Downloading http://wl500g.dyndns.org/ipkg/ipkg_0.99.149-2_mipsel.ipk ...
Connecting to wl500g.dyndns.org[212.192.248.17]:80
ipkg_0.99.149-2_mips 100% |***************************************| 71113       00:00 ETA
Done.
Unpacking ipkg...Done.
Configuring ipkg...tar: Cannot create directory `./opt/bin': No such file or directory
tar: ./opt/bin/ipkg: No such file or directory
Done.

I have followed the instruction to create /opt/tmp/ipkg. Currently, I don't create a swap partition. Is it a must? Could someone help? I am a beginner to Linux.

[admin@(none) root]$ free
              total         used         free       shared      buffers
  Mem:        30140        14608        15532            0         3260
 Swap:            0            0            0
Total:        30140        14608        15532
[admin@(none) root]$ df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root                 2944      2944         0 100% /
/dev/discs/disc0/part1  10690160   2423880   7714452  24% /opt
/dev/discs/disc0/part5  20659352   3896348  16763004  19% /tmp/harddisk
[admin@(none) root]$

Galleons

[calebz]

Do you have proper filesystems on that HDD ?

[Galleons]

I think so because the log shows it and I can access the data in the drive.

Jan  1 08:00:04 kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Jan  1 08:00:04 kernel:   Vendor: ST340015  Model: A                 Rev: 0811
Jan  1 08:00:04 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
Jan  1 08:00:04 kernel: Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Jan  1 08:00:04 kernel: SCSI device sda: 78165360 512-byte hdwr sectors (40021 MB)

I think the reason it cannot create the directory is because the directory is just a link. And, the link is actually not valid.

[admin@(none) /]$ ls -l ./opt/bin
lrwxrwxrwx    1 admin    root            9 Jan  1  1970 ./opt/bin -> /apps/bin

But, I don't know how to change it and what should I change.