dfc wiki

Note: If you haven't already, you might want to have a look at the FAQ.

So dfc is a simple tool that display disk usage. Ok but how does it look like?

Here is the output of dfc on my laptop:

rootfs      [===========---------]   54%     12.7G     27.9G /
/dev        [--------------------]    0%      3.8G      3.8G /dev
run         [=-------------------]    0%      3.8G      3.8G /run
/dev/sdc1   [===========---------]   54%     12.7G     27.9G /
shm         [==------------------]    8%      3.5G      3.8G /dev/shm
tmpfs       [=-------------------]    0%      6.0G      6.0G /tmp
/dev/sda7   [====----------------]   16%     80.5M     95.4M /boot
/dev/sda3   [===============-----]   74%     91.1G    344.6G /home
/dev/sda5   [===========---------]   52%      6.1G     12.6G /var
/dev/sdb1   [===============-----]   73%     81.3G    297.8G /mnt/Videos

A screenshot is actually better to show color output:

Of course, there is some options available, dfc -h summarizes them:

Usage:  dfc [OPTION(S)] [-c WHEN] [-e FORMAT] [-p FSNAME] [-q SORTBY] [-t FSTYPE] [-u UNIT]
Available options:
        -a      print all mounted filesystem
        -b      do not show the graph bar
        -c      choose color mode. Read the manpage
                for details
        -d      show used size
        -e      export to specified format. Read the manpage
                for details
        -f      disable auto-adjust mode (force display)
        -h      print this message
        -i      info about inodes
        -l      only show information about locally mounted
                file systems
        -m      use metric (SI unit)
        -M      do not print "mounted on" 
        -n      do not print header
        -o      show mount flags
        -p      filter by file system name. Read the manpage
                for details
        -q      sort the output. Read the manpage
                for details
        -s      sum the total usage
        -t      filter by file system type. Read the manpage
                for details
        -T      show filesystem type
        -u      choose the unit in which
                to show the values. Read the manpage
                for details
        -v      print program version
        -w      use a wider bar
        -W      wide filename (un truncate)

If it is not clear enough, you can always read the manpage dfc(1) which you can find as a download link on the bottom of this page.

dfc -Tadisob:

rootfs           rootfs        54%     13.8G     12.7G     27.9G     1835K     1294K /                 rw
proc             proc         100%        0B        0B        0B        0         0  /proc             rw,nosuid,nodev,noexec,relatime
sys              sysfs        100%        0B        0B        0B        0         0  /sys              rw,nosuid,nodev,noexec,relatime
/dev             devtmpfs       0%        0B      3.8G      3.8G      993K      992K /dev              rw,nosuid,relatime,size=3974136k,nr_inodes=993534,mode=755
run              tmpfs          0%    352.0K      3.8G      3.8G      994K      993K /run              rw,nosuid,nodev,relatime,mode=755
/dev/sdc1        ext4          54%     13.8G     12.7G     27.9G     1835K     1294K /                 rw,noatime,user_xattr,acl,commit=600,barrier=1,data=ordered,discard
devpts           devpts       100%        0B        0B        0B        0         0  /dev/pts          rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000
shm              tmpfs          8%    318.3M      3.5G      3.8G      994K      992K /dev/shm          rw,nosuid,nodev,relatime
tmpfs            tmpfs          0%     20.0K      6.0G      6.0G      994K      994K /tmp              rw,nosuid,nodev,noexec,relatime,size=6291456k
/dev/sda7        ext2          16%      9.9M     80.5M     95.4M       25K       25K /boot             rw,relatime,user_xattr,acl,barrier=1
/dev/sda3        ext4          74%    236.2G     91.1G    344.6G       22M       21M /home             rw,noatime,user_xattr,acl,commit=600,barrier=1,data=ordered
/dev/sda5        reiserfs      52%      6.5G      6.1G     12.6G        0         0  /var              rw,noatime
gvfs-fuse-daemon +fuse-daemon 100%        0B        0B        0B        0         0  /home/robin/.gvfs rw,nosuid,nodev,relatime,user_id=1000,group_id=100
/dev/sdb1        ext4          73%    201.6G     81.3G    297.8G       19M       19M /mnt/Videos       rw,noatime,user_xattr,acl,commit=600,barrier=1,data=ordered
SUM:                           65%    472.2G    221.0G    728.2G       49M       47M

And a screenshot that shows how it looks like when some options are activated: