Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sda1       78122968 16966776  57187732  23% /
udev              505784        4    505780   1% /dev
tmpfs             205424      904    204520   1% /run
none                5120        0      5120   0% /run/lock
none              513556      360    513196   1% /run/shm
none              102400       20    102380   1% /run/user
/dev/sdb1      115377640 86545684  22971044  80% /backup