I am running dual boot Ubuntu 18.04 with Windows 10. I installed Ubuntu as an afterthought, and originally split the disk roughly down the middle between the two. I later reduced the size of the Windows 10 partition and moved the Ubuntu partition to take over the new free space. Unfortunately, Ubuntu doesn't seem to recognize all of its new free space--it is using some, but not all, of the newly acquired space.
lsblk reports:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 89.1M 1 loop /snap/core/8268
loop1 7:1 0 14.8M 1 loop /snap/gnome-characters/495
loop2 7:2 0 44.9M 1 loop /snap/gtk-common-themes/1440
loop3 7:3 0 3.7M 1 loop /snap/gnome-system-monitor/127
loop4 7:4 0 14.8M 1 loop /snap/gnome-characters/399
loop5 7:5 0 956K 1 loop /snap/gnome-logs/93
loop6 7:6 0 956K 1 loop /snap/gnome-logs/81
loop7 7:7 0 4.3M 1 loop /snap/gnome-calculator/704
loop8 7:8 0 160.2M 1 loop /snap/gnome-3-28-1804/116
loop9 7:9 0 3.7M 1 loop /snap/gnome-system-monitor/135
loop10 7:10 0 4.2M 1 loop /snap/gnome-calculator/544
loop11 7:11 0 54.7M 1 loop /snap/core18/1668
loop12 7:12 0 91.4M 1 loop /snap/core/8689
sda 8:0 0 477G 0 disk
├─sda1 8:1 0 579M 0 part
├─sda2 8:2 0 174.8G 0 part /home/user/Windows
└─sda5 8:5 0 301.6G 0 part /
GParted agrees: disk size: 301.57 GiB; Used: 273.14 GiB; Unused: 28.43 GiB
But df -h disagrees.
Filesystem Size Used Avail Use% Mounted on
udev 7.8G 0 7.8G 0% /dev
tmpfs 1.6G 2.0M 1.6G 1% /run
/dev/sda5 296G 268G 14G 96% /
tmpfs 7.8G 88M 7.7G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/loop2 45M 45M 0 100% /snap/gtk-common-themes/1440
/dev/loop0 90M 90M 0 100% /snap/core/8268
/dev/loop3 3.8M 3.8M 0 100% /snap/gnome-system-monitor/127
/dev/loop4 15M 15M 0 100% /snap/gnome-characters/399
/dev/loop1 15M 15M 0 100% /snap/gnome-characters/495
/dev/loop5 1.0M 1.0M 0 100% /snap/gnome-logs/93
/dev/loop7 4.4M 4.4M 0 100% /snap/gnome-calculator/704
/dev/loop6 1.0M 1.0M 0 100% /snap/gnome-logs/81
/dev/loop8 161M 161M 0 100% /snap/gnome-3-28-1804/116
/dev/loop9 3.8M 3.8M 0 100% /snap/gnome-system-monitor/135
/dev/loop11 55M 55M 0 100% /snap/core18/1668
/dev/loop10 4.3M 4.3M 0 100% /snap/gnome-calculator/544
/dev/loop12 92M 92M 0 100% /snap/core/8689
/dev/sda2 175G -29G 204G - /home/user/Windows
tmpfs 1.6G 16K 1.6G 1% /run/user/121
tmpfs 1.6G 40K 1.6G 1% /run/user/1000
I can account for the ~5G difference between disk size in df vs lsblk/gparted with swap:
$ du -h /swap*
2.1G /swapfile
1.1G /swapfile2
1.1G /swapfile3
1.1G /swapfile4
I know that I'm not going to get everything out of my disk/partition, but a 14 GiB difference in free space is make-or-break for a couple extra VMs. Any thoughts?
sudo df -h /to see what fills up your system, Drill down through the largest directories. A guess would be /var/log - but it is only a guess. Update your question with the result of the df. – Soren A Mar 19 '20 at 14:53