Check Linux partitions and free space using terminal

To check list of partitions in partition table:

# fdisk -lu
Disk /dev/sda: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders, total 10485760 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63      208844      104391   83  Linux
/dev/sda2          208845    10474379     5132767+  8e  Linux LVM

To check free space and usage details:

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      3.8G  884M  2.7G  25% /
/dev/sda1              99M   13M   82M  13% /boot
tmpfs                 252M     0  252M   0% /dev/shm