4 GB hard disk

when i type df -h , it show only 2GB information

Filesysem Size Used Avail Use% Mounted on
/dev/ide/host0/bus1/target0/lun0/part5
1.9G 1.4G 428M 77%

how can i make rest of 2GB as linux partition so it will be show while typing df -h

Only mounted partitions will be showed in df. If you have two 2 GB partition then you have to format the other one (using mkfs utility for example) and mount it. But if you have a one 4 GB partition but df says that it's 2 GB then there is a problem :-) Which one?

Is the rest of the drive part of another partition? Or did you partition the drive correctly?

need the results of fdisk -l
on the drive in question...

The partition youare showing us here in the first logical drive in the extended partition. Maybe the rest is a primary partition...

you can do a fdisk -l to get a list of all the partitions on your disk.

df only shows the mounted partitions.

#fdisk -l

Disk /dev/ide/host0/bus0/target0/lun0/disc: 4303MB,4303272960 bytes
255 heads, 63 sectors/track, 523 cylinders
Units=cylinders of 16065 * 512= 8225280 bytes

Device Boot Start End Blocks Id S system

/dev/ide/host0/bus0/target0/lun0/part1 * 1 484 3887698+ 83 L linux
/dev/ide/host0/bus0/target0/lun0/part2 485 516 257040 5 E Extended
/dev/ide/host0/bus0/target0/lun0/part5 485 516 257080+ 82 L linux swap

Ah, you must have two drives... this one is a primary master hd and the one you listed earlier was a partition on a primary slave hd.

#fdisk -l

Disk /dev/ide/host0/bus1/target0/lun0/disc: 40.0 GB, 40020664320 bytes
16 heads, 63 sectors/track, 77545 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System
/dev/ide/host0/bus1/target0/lun0/part1 1 77545 39082648+ 5 Extended
/dev/ide/host0/bus1/target0/lun0/part5 1 3969 2000313 83 Linux
/dev/ide/host0/bus1/target0/lun0/part6 3970 15596 5859976+ 83 Linux
/dev/ide/host0/bus1/target0/lun0/part7 15597 17581 1000408+ 83 Linux
/dev/ide/host0/bus1/target0/lun0/part8 17582 21457 1953472+ 83 Linux

Disk /dev/ide/host0/bus0/target0/lun0/disc: 4303 MB, 4303272960 bytes
255 heads, 63 sectors/track, 523 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/ide/host0/bus0/target0/lun0/part1 * 1 484 3887698+ 83 Linux
/dev/ide/host0/bus0/target0/lun0/part2 485 516 257040 5 Extended
/dev/ide/host0/bus0/target0/lun0/part5 485 516 257008+ 82 Linux swap