Problem: Not able to login to Ubuntu Linux system because the disk partition containing the HOME directory has become full.

Solution:

• Press CTRL ALT F1 together to switch to text mode and try to login.
• After login, check the free space in disk partitions by give the command,

$ df -h

• Make space in the disk partition containing the HOME directory by deleting files from the command line. After adequate space has been freed, press CTRL D to logout. Press CTRL ALT F7 together to get the graphical user interface.