1042% df -k /dev/hda7
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9606556   7156344   1962216  79% /
1043% perl -e'print `df -k /dev/hda7`'
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9606556   7156344   1962216  79% /