My HD is 30GB now I have 1 / partition, 1Swap, 1/home and
I have a 10GB free space without partition what can I do to take advantage of the free space ?, how can I do a partition? I tried with this:

[root@ud3-25 Gerardo]# /sbin/fdisk /dev/shm
You will not be able to write the partition table.

Unable to read /dev/shm

Thanks

Try /sbin/fdisk /dev/hda I am assuming this is the first HD.

That's not a drive IDE drives have to be /dev/hda, /dev/hdb, /dev/hdc or /dev/hdc unless it's a raid array.

My HD config is :

[root@ud3-25 Gerardo]# /sbin/fdisk /dev/hda -l

Disk /dev/hda: 255 heads, 63 sectors, 3738 cylinders
Units = cylinders of 16065 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 1925 15358140 83 Linux
/dev/hda3 1926 2435 4096575 83 Linux
/dev/hda4 2436 3738 10466347+ f Win95 Ext'd (LBA)
/dev/hda5 2436 2459 192748+ 82 Linux swap

and I tryed sbin/fdisk /dev/hda and it works but in the menu what command I need choose?

Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)

Thanks!!

So you have cylinders 2460 - 3738 left for partitioning.

Just like the menu says, n creates a new partition (but not unless you exit with w) with the default start = first available cylinder and end = last cylinder

man fdisk
info fdisk

Don't forget after partitioning, you have to format with mkfs, then make mount points, then mount.

Hi again:

Hey what did you mean with "unless you exit with w", please if you can tell me step by step I will appreciate. you I'm newbie

Thanks.

Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)

As is says, w actually writes the partition table and exits. You can chicken out with q quit without saving changes.

It's self explanatory, at least it makes sense to me.

I tried this one

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

and when I type df -h still

[root@ud3-25 Gerardo]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda2 14G 1.7G 12G 12% /
/dev/hda1 99M 9.2M 84M 10% /boot
/dev/hda3 3.8G 119M 3.5G 4% /home
none 93M 0 93M 0% /dev/shm

Thanks

Obviously you didn't n add a new partition before you re-wrote the exact same partition table.

Or if you did, did you reboot?

Sorry but belive me I'm newbie in partitions and I fear to fall in a big mistake
I reboot my box then I add a new partition and then "w" and appeared me the same error and now if I try to add a new partition appear me "No free sectors available" what do you think?

Thanks

Go back through the process. Look at your partition table again

fdisk /dev/hda -l

Has it changed since your first posting of it?

You won't see it in df -h until you

1. Create the new partition
2. Create a filesystem
3. Create a mount point
4. Mount the drive

Then you can see it.

Yeah now is:

/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 1925 15358140 83 Linux
/dev/hda3 1926 2435 4096575 83 Linux
/dev/hda4 2436 3738 10466347+ f Win95 Ext'd (LBA)
/dev/hda5 2436 2459 192748+ 82 Linux swap
/dev/hda6 2460 3738 10273536 83 Linux

but how can I use it?

how can I make the file system? , and the mount point?

Thanks a lot..