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#sudo apt-get install ncdu
sudo ncdu -rx /
# -r = read-only
# -x = do not traverse mounts
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The df command stands for "disk-free," and shows available and used disk space on the Linux system.
df -h shows disk space in human-readable format
df -a shows the file system's complete disk usage even if the Available field is 0
df command
df -T shows the disk usage along with each block's filesystem type (e.g., xfs, ext2, ext3, btrfs, etc.)
df -i shows used and free inodes