Measuring disk space

df -h <dir> Returns disk usage and free space for the filesystem containing the given directory. Similarly, the -h option only exists in GNU df.
Example: > df -h . Filesystem Size Used Avail Use% Mounted on /dev/hda5 9.2G 7.1G 1.8G 81% /
df -h Returns disk space information for all filesystems available in the system. When errors happen, useful to look for full filesystems.

df -h <dir> Returns disk usage and free space for the filesystem containing the given directory. Similarly, the -h option only exists in GNU df.