Question

Disk Free Utility

Enter df -B 4096 to execute the disk free utility. The “-B 4096” tells the utility that you want its output to be displayed in units of 4K blocks.

1. Calculate the size of the root directory (/) in KB, MB, or GB
2. What is the path of the device to which root is mounted?

root@ubuntu: /home/ubuntu# Filesystem udev tmpfs /dev/sro /dev/loopo /cow tmpfs tmpfs tmpfs tmpfs tmpfs /dev/loop1 /dev/Loop2 tmpfs /dev/loop3 /dev/loop4 /dev/Loop5 /dev/loop6 /dev/loop7 df -B 4096 4K-blocks Used Available Use% Mounted on 296373 0% /dev 60056 1%/run 296373 60398 342 487424 487424 465120 465120 /cdrom /rots 100% 100% 0 301987 94691 207296 32%/ /dev/shm /run/Lock /sys/fs/cgroup 301987 1280 301987 301987 60397 301987 1278 391987 0% 1% 6% 301987 0%/tmp 13 23296 23296 8864 8864 /run/user/999 /snap /core/6350 /snap/gtk-common-themes/818 /run /user/0 /snap/gnome-3-26-1604/74 /snap/gnome-calculator/260 /snap/gnome-characters/139 /snap/gnome-logs/45 /snap/anone-system-monitor/57 60384 1% 100% 100% 0% 100% 100% 100% 100% 100% 60397 60397 0 36032 36032 576 3328 3328 3744 3744 960 576 960

Answer 1

1. Calculate the size of the root directory (/) in KB, MB, or GB

Size of the root directory in KB:

$   df /root -B 1024

   Size of the root directory in MB:

$ df /root -B 1048576

Size of the root directory in GB:

$ df /root -B 1073741824

2.  What is the path of the device to which root is mounted?

  Below is the example output of the df command :

  Filesystem 1M-blocks Used Available Use% Mounted on
/dev/sda1 51001 21077 27312 44% /

  The df command gives Mounted on column in the output, the value of that column is the path where

root is mounted on.

ExampleScreenshots:

ashok@ashok-VirtualBox: df /root -B 1024 Filesystem /dev/sdal ashok@ashok-VirtualBox:-$ df /root -B 1048576 Filesystem /dev/sdal ashok@ashok-VirtualBox:$ df /root -B 1073741824 Filesystem /dev/sdal ashok@ashok-VirtualBox:-$ Used Available Use% Mounted on 1K-blocks 52224588 21582320 27966352 44%/ 1M-blocks Used Available Use% Mounted on 51001 21077 27311 44%/ 1G-blocks Used Available Use% Mounted on 21 2744%| 50