whenever I try to install any app

I get the error message
not enough space in application memory

Even though whenever I click file manager/memory usage it says
I have 73mb available application memory

What should I do

Please post the output from this:

Here are the results from
df -h
in command line


BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ $ df -h
Filesystem Size Used Available Use% Mounted on
rootfs 227.8M 217.9M 5.7M 97% /
ubi0:rootfs 227.8M 217.9M 5.7M 97% /
tmpfs 1.0M 72.0k 952.0k 7% /tmp
tmpfs 256.0k 84.0k 172.0k 33% /var/run
none 10.0M 72.0k 9.9M 1% /dev
tmpfs 64.0M 4.0k 64.0M 0% /dev/shm
/dev/mmcblk0p2 2.0G 1.8G 70.9M 96% /home
/home/opt 2.0G 1.8G 70.9M 96% /opt
/opt/pymaemo/usr/lib/python2.5
2.0G 1.8G 70.9M 96% /usr/lib/python2.5
/opt/pymaemo/usr/share/pyshared
2.0G 1.8G 70.9M 96% /usr/share/pyshared
/opt/pymaemo/usr/lib/pyshared
2.0G 1.8G 70.9M 96% /usr/lib/pyshared
/opt/pymaemo/usr/share/python-support
2.0G 1.8G 70.9M 96% /usr/share/python-support
/opt/pymaemo/usr/lib/python-support
2.0G 1.8G 70.9M 96% /usr/lib/python-support
/dev/mmcblk0p1 27.0G 22.0G 5.0G 82% /home/user/MyDocs
~ $

I think the problem is rootsh being 97% used.

Read this:
http://wiki.maemo.org/Free_up_rootfs_space

EDIT:
Take note what it says on the top:
Some instructions here may cause serious problems. When unsure, see General precautions
Backing up your data is recommended. In case of trouble you might need to re-flash your device.

try this:

in xterminal type:

sudo gainroot
apt-get autoclean
apt-get purge

I have used all the commands above and
I am still unable to install applications on my Nokia n900
and I am given the same error

When done that, show us the output from df -h again.

I have df -h in command line again here are the results


/home/user # df -h
Filesystem Size Used Available Use% Mounted on
rootfs 227.8M 217.9M 5.7M 97% /
ubi0:rootfs 227.8M 217.9M 5.7M 97% /
tmpfs 1.0M 72.0k 952.0k 7% /tmp
tmpfs 256.0k 84.0k 172.0k 33% /var/run
none 10.0M 72.0k 9.9M 1% /dev
tmpfs 64.0M 4.0k 64.0M 0% /dev/shm
/dev/mmcblk0p2 2.0G 1.8G 79.2M 96% /home
/home/opt 2.0G 1.8G 79.2M 96% /opt
/opt/pymaemo/usr/lib/python2.5
2.0G 1.8G 79.2M 96% /usr/lib/python2.5
/opt/pymaemo/usr/share/pyshared
2.0G 1.8G 79.2M 96% /usr/share/pyshared
/opt/pymaemo/usr/lib/pyshared
2.0G 1.8G 79.2M 96% /usr/lib/pyshared
/opt/pymaemo/usr/share/python-support
2.0G 1.8G 79.2M 96% /usr/share/python-support
/opt/pymaemo/usr/lib/python-support
2.0G 1.8G 79.2M 96% /usr/lib/python-support
/dev/mmcblk0p1 27.0G 22.0G 5.0G 82% /home/user/MyDocs

Obviously it has not affected it at all.
Are you sure you did the commands _as root_?

You can also try this

yes i am running commands as root

before I type any command in

I type sudo gainroot

and I have just ran the command apt-get autoremove

I am still unable to install any apps

and I am given the same error