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wobbler
Asked: 2019-11-24 05:03:18 +0800 CST

/ is full. How do I find out what's taking up space? [duplicate]

  • 772

I Recently noticed an lightweight app (Sonarr) wasn't running, so when into webmin to find a fidk fill error. '/' was 100% full. I have hunted around and sound a few commands to get a bit of short term space back (down to 96%), but there shouldn't be that much usage. I'm just running Ubuntu Server LTS18 and a couple of apps on a 120GB SSD. But I am seeing the below and cannot (and do no know how to) find where the heavy directories and/or file are in /.

Filesystem                                 Size  Used Avail Use% Mounted on
udev                                       7.3G     0  7.3G   0% /dev
tmpfs                                      1.5G  2.8M  1.5G   1% /run
/dev/sde2                                  110G  104G  4.6G  96% /
tmpfs                                      7.3G   12K  7.3G   1% /dev/shm
tmpfs                                      5.0M     0  5.0M   0% /run/lock
tmpfs                                      7.3G     0  7.3G   0% /sys/fs/cgroup
/dev/loop0                                  90M   90M     0 100% /snap/core/7917
/dev/loop1                                  90M   90M     0 100% /snap/core/8039
storage disk-usage

2 Answers

  1. Best Answer

    Try to install ncdu - it is a graphical disk usage app for the command line.

    sudo apt-get install ncdu

    And then

    ncdu /

    Then you'll see a list of the directories within / - you can navigate the directories and drill into them by hitting enter.

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  2. The other answer recommends installing ncdu which appears to be a great tool and loved by many users. However this is a "Catch 22" situation because when you are out of disk space you usually can't install a program to find out why because... you have no disk space.

    The only option is to use a program already installed:

    $ sudo du -cha --max-depth=1 --exclude=/mnt / 2>/dev/null

40M     /core
1.7G    /var
6.5M    /dev
15M     /bin
3.4M    /tmp
681M    /opt
6.5G    /usr
4.4G    /lib
3.9M    /lib32
17M     /root
15M     /etc
1.1G    /boot
12G     /home
13M     /sbin
1.8M    /run
26G     /
26G     total
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