Oracle Linux: Check Disk Usage Meaningfully
(Doc ID 2522329.1)
Last updated on FEBRUARY 26, 2020
Applies to:Linux OS - Version Oracle Linux 5.11 to Oracle Linux 7.6 with Unbreakable Enterprise Kernel [4.14.35] [Release OL5U11 to OL7U6]
The venerable df(1) and du(1) commands may give inconsistent results because the commands do not interpret disk occupancy in the same way. For example, a sparse file size may show as 10Tb but the file may only occupy 1 block of disk space.
The command du -sh /var/* doesnot show the proper summary of the disk usage, only an approximation. We suggest additional ways to check disk usage below.
The df(1) command shows 30G space consumption, but the individual file roster given by du(1) shows significantly less.
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