How can i solve that problem in my N900,i am not using my mobile now because there is many problems as listed above and i am totally new for Maeo5 ,i have no idea,plz help me, explain me if u have any idea,Thanks. KHYAM OLI

basically, do

apt-get clean

that will purge the cache of downloaded packages and free up space.
it's basically, as pointed out to you already, what is described in #22 -- but with the proper command.

afterwards, pleasse do

dpkg -C

and post the output here.

I opened " X Terminal " then i did as-
du -sh /var/cache/apt/archives
after that i did 'Enter' it is came again same as below-
0 /var/cache/apt/archives
after that i did again as-
rm /var/cache/apt/archives/*.deb
then 'Enter' it is came again as below-
rm: cannot remove ' /var/cache/apt/archives/*.deb' : No such file or directory

plz give me idea detail again ,Thanks, KHYAM OLI

that means, the folder is empty.

small, wonder. when the folder is empty, you can't delete files in it.

please, post the output of

df -h

i have type df -h in " X Terminal" then Enter ,there is came file system as-
Filesystem Size Used Available Use% Mouned on
rootfs 227.6M 227.6M 0 100% /
ubi0:rootfs 227.6M 227.6M 0 100% /

many kinds of file below but thoes file are not full every file has free space,just two file is full ,no free space whiich one i listed above.

ofcourse u can fix my problem because u r helping me ,thanks for that arne.anka, i am waitng for your kind help. KHYAM OLI

Take a read at this:
http://wiki.maemo.org/Free_up_rootfs_space

when i did apt-get clean by " X Terminal" ,it said that-
~ $ apt-get clean
E: Could not open lock file /var/cache/apt/archives/lock -open (13 Permission denied)
E: Unable to lock the download directory

Thanks for the link, and solution.It Worked great

Hi, I had the same problem on my N800. Mine was as a result of not having enough space to install the google-latitude-updater app on my N800 - the app installed half-way and complained of insuffient space on my device. After this, I started getting the operation failed error msg each time I open Application Manager.


This was how I resolved it:

1. open xterminal and run the following command:
df -h

check the available space for the /dev/mtdblock4 filesystem. Mine was:

Filesystem Size Used Avail Use% Mounted on
/dev/mtdblock4 249.5M 248.2 1.3M 99% /

This meant that I had 1.3M of disk space. This is too small to run Application Manager.

2. In order to create more space, I had to delete my Gmail Account which had about 477 messages.
Goto Tools -> Accounts . Select ur e-mail acct, if any, and then delete it. This should create additional disk space for /dev/mtdblock4. Use df -h to verify that.

3. I then went on to uninstall the google-latitude-updater app to create more disk space (about 10.2MB) for /dev/mtdblock4.

Now u should be able to successfully open App Manager without the operation failed error msg.

In summary, the whole idea is to create enough disk space on /dev/mtdblock4 in order to run the app manager sw.

Cheers

you need to be root for that.
if your prompt starts with
you are not root. when root the prompt looks like