Determine disk usage for a filesystem

Top 10 for root filesystem

1
[root@localhost ~]# du -amx --max-depth=1 / | sort -rn | head

Top 10 for a specific filesystem

1
[root@localhost ~]# du -sm /var/* | sort -rn | head

or

1
2
[root@localhost ~]# cd /var
[root@localhost ~]# du -sm * | sort -rn | head