$ df -F ufs -o i
Filesystem iused ifree %iused Mounted on
/ 183292 812612 18% /
/app 5 19003 0% /app
/app/a 118742 2991274 4% /app/a
/opt/b 3547 500837 1% /opt/b
/opt/sysmgt 4078 472082 1% /opt/sysmgt
/var/app 4 19004 0% /var/app