The sys admin’s daily grind: ncdu


Article from Issue 81/2007

I’ve never heard of an admin having to remove disks from a server because of a chronic lack of data, but full disks are part of the daily grind. The du clone ncdu will help slim down your data.

I use Nagios to keep track of hard-disk capacity on my server disks. Whenever the successor to NetSaint kindly informs me that the remaining disk capacity on server XY has dropped below the magical threshold of 10%, I may be warned, but the trouble is just starting. If I’m out of luck, the whole data repository could reside on a RAID system without anything in the line of partitioning, and believe me, this is fairly typical for smaller servers. With a bit more luck, Nagios might tell me that the /var partition is the bottleneck, leaving me to launch du and find out where the disk hogs have their megabytes stashed. Unfortunately, output from the Disk Usage tool for overly complicated directory trees, like the ones I have, is less than intuitive.

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy Linux Magazine

Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

  • Charly's Column: Nmon

    Nmon monitors system information. You can use the Nmon’s capture mode to output data to a file, then extract the values you need with a script.

  • Charly’s Column: Btrfs

    Btrfs might not be complete, but conceptually, it combines so many useful filesystem functions that Charly couldn’t wait to play around with it.

  • Charly's Column

    Immenstadt, Germany, was the site of the 10th anniversary LUG Camp for the founding Linux User Groups from Germany's Allgäu and Augsburg.

  • Charly's Column

    Debian fans appreciate the ability to update their systems to a new release without having to reinstall. The Deborphan tool takes care of the victims of the upgrade by searching for orphaned packages on which no other packages depend.

  • Charly's Column

    On a trip to Berlin, Charly discovers that the nmap port scanner has a new cousin who enjoys spying on phones – smap scans networks for VoIP devices.

comments powered by Disqus

Direct Download

Read full article as PDF:

Charlys_Column.pdf  (86.79 kB)