[root@localhost test10g]# tune2fs -help
tune2fs 1.35 (28-Feb-2004)
tune2fs: invalid option — h
Usage: tune2fs [-c max-mounts-count] [-e errors-behavior] [-g group]
[-i interval[d|m|w]] [-j] [-J journal-options]
[-l] [-s sparse-flag] [-m reserved-blocks-percent]
[-o [^]mount-options[,…]] [-r reserved-blocks-count]
[-u user] [-C mount-count] [-L volume-label] [-M last-mounted-dir]
[-O [^]feature[,…]] [-T last-check-time] [-U UUID] device
[root@localhost test10g]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 8776068 7576504 753764 91% /
/dev/sda1 497829 16303 455824 4% /boot
none 517300 0 517300 0% /dev/shm
/dev/sda5 1035660 96452 886600 10% /tmp
[root@localhost test10g]# tune2fs -l /dev/sda1|grep Block
Block count: 514048
Block size: 1024
Blocks per group: 8192
[root@localhost test10g]# tune2fs -l /dev/sda2|grep Block
Block count: 2229018
Block size: 4096
Blocks per group: 32768