Unix for Advanced Users

7. Viewing System Information

7.2.4 How come the disk is full? df

df summarizes disk space usage. Although its output varies among implementations of Unix, you can count on seeing device file names, mount points and disk usage. Some systems require flags on the command line to see summaries of free space.

Sample output from df under Linux might look like:

Filesystem         1024-blocks  Used Available Capacity Mounted on
/dev/sda3             882015  648783   187664     78%   /
/dev/sda5             150691  120374    22536     84%   /home
/dev/sda1             149324  127748    21576     86%   /msdosc.