场景：当服务器空间被占满时，却不知道是哪里占用空间比较大的时候，可以使用该命令排查。

    1. 查看各挂载目录空间情况

      1. [oracle@localhost database]$ df -h
      2. Filesystem      Size  Used Avail Use% Mounted on
      3. /dev/sda3        28G   16G   13G  55% /
      4. devtmpfs        895M     0  895M   0% /dev
      5. tmpfs           910M     0  910M   0% /dev/shm
      6. tmpfs           910M   11M  900M   2% /run
      7. tmpfs           910M     0  910M   0% /sys/fs/cgroup
      8. /dev/sda1       297M  157M  140M  53% /boot
      9. tmpfs           182M  4.0K  182M   1% /run/user/42
      10. tmpfs           182M   28K  182M   1% /run/user/1001
      11. [oracle@localhost database]$

    2. 使用下面的命令排查 ```bash [oracle@localhost database]$ ll total 44 drwxr-xr-x. 4 oracle oinstall 248 Aug 27 2013 install -rw-r—r—. 1 oracle oinstall 30016 Aug 26 2013 readme.html drwxr-xr-x. 2 oracle oinstall 61 Aug 26 2013 response drwxr-xr-x. 2 oracle oinstall 34 Aug 26 2013 rpm -rwxr-xr-x. 1 oracle oinstall 3267 Aug 26 2013 runInstaller drwxr-xr-x. 2 oracle oinstall 29 Aug 26 2013 sshsetup drwxr-xr-x. 14 oracle oinstall 4096 Aug 26 2013 stage -rw-r—r—. 1 oracle oinstall 500 Aug 26 2013 welcome.html [oracle@localhost database]$ du -sh * 2.1M install 32K readme.html 80K response 12K rpm 4.0K runInstaller 32K sshsetup 2.5G stage 4.0K welcome.html [oracle@localhost database]$

    ```