Latest Posts in Linux and Unix

CimmerianX, are you some kind of masochist? That sounds like fun though! I'll bet you could get openvz running somewhere in there too.

dihmen, I assume you are interested in using the built-in "KVM" (Kernel Virtual Machine) functionality in CentOS/RHEL 6. Here's a guide to setting up and running KVM under RHEL 6 (or CentOS 6): http://itscblog.tamu.edu/startup-guide-for-kvm-on-centos-6/

Another option that is built into the kernel is LXC (LinuX Containers). It's not full virtualization like KVM, but it's nice and lightweight. It's similar to OpenVZ if you have any experience with that. Here's a link: http://wiki.centos.org/HowTos/LXC-on-CentOS6

I hope this helps!
-G

SPeed_FANat1c,

That's interesting! I'm stumped... Can we see the full 'df' output?

rubberman,

That's one of the first things I thought about (I used to work for a company that writes backup software and this came up a lot) so I researched it to refresh my memory. The filesystem (ext2, ext3, ext4) reserves about 5% for a buffer zone by default, which is nowhere near the 20ish percent that our OP is seeing.

This does come up a lot on larger filesystems. Since the default is 5%, you lose about 50GB on a 1TB partition, or 400GB on an 8TB partition. But 5% of 20GB is only 1GB. You usually notice the difference in the space remaining in your 'df' output, but 'du' output should be correct. I suspect that whats being reported is actually correct, but we aren't seeing all the numbers.

Thanks!
-G

You are talking about the network PXE boot capability? Yes, it uses tftp to download the system image to boot.

Linux automatically reserves about 10% of available space for root, so when users fill up the file system(s), the admin can still get things re-arranged (backups, remove old/stale files, etc).

Hello Moe2!

You may want to look into using pam_passwdqc.so. If configured correctly, it should tell the user what's acceptable when the passwd command is invoked.

I hope this helps!
-G

Hidden files should be included in du output. I'm not familiar with ncdu, but I'm checking it out now!
What do you get from this command: sudo du -sh /

Thanks!
-G

It could also be that it's actually just a mathematical problem with the computer. You see, most people view 1 GB as 1000 MB. In reality, it's 1024 (computers do everything in binary, which is powers of 2). This 24 mb adds up with each GB. And really, if you look at it that way it's even larger. Basically, the right click on the drive telling you the specs and the space are calculated as 1000mb per Gb. It's not gone, just not showing it to you correctly.

That in conjunction with the MBR (master boot record) and the paging file plus the reserved space for the recycle bin can add up. The paging file can range anywhere from a couple hundred MB to a couple GB (depending on how big your filing system is). All that adds u [Sometimes].

Be sure that you do not have any hidden files, coz those hidden files tend to eat up hard disk space without your knowledge.

What version are you running and what does your config file have in it?