Command-line Knowledge Base

Use findmnt to display free and used space of mounted filesystems

findmnt -D
SOURCE                  FSTYPE       SIZE   USED   AVAIL USE% TARGET
devtmpfs                devtmpfs   994.2M      0  994.2M   0% /dev
selinuxfs               selinuxfs       0      0       0    - /sys/fs/selinux
tmpfs                   tmpfs     1001.5M    68K 1001.4M   0% /dev/shm
tmpfs                   tmpfs     1001.5M   724K 1000.8M   0% /run
tmpfs                   tmpfs     1001.5M      0 1001.5M   0% /sys/fs/cgroup
/dev/mapper/fedora-root ext4         6.5G   5.3G  811.6M  82% /
tmpfs                   tmpfs     1001.5M    60K 1001.5M   0% /tmp
/dev/sda1               ext4       476.2M 107.7M  339.6M  23% /boot
NULL