Archive for the ‘centos’ Category

Unmounting stale NFS mount points in Linux

Unmounting stale NFS mount points in Linux can be royal pain sometimes. In Solaris, umount -f does the job just fine. Linux on the other hand seems to get stuck if you use only -f switch. It just hangs there until you reboot the system. If you use lazy umount, that will probably help you [...]

Posted on March 31, 2011 at 21:35 by somedude · Permalink · Leave a comment
In: centos, linux, linux tips, linux utilities, redhat

Why it’s not a good idea to remove active log file

So, someone deleted a log file of a running process because partition was running out of space. That’s seemingly logical thing to do, but not a wise one. What ended up happening was that the filesystem was still getting filled and deleting the log file made no difference whatsoever. So what happened? When the log [...]

Posted on February 14, 2011 at 16:33 by somedude · Permalink · Leave a comment
In: centos, linux, linux tips, linux utilities, redhat

Linux multipathing

I use MPxIO in Solaris quite often and it works very well for me. This time I needed to test out I/O multipathing in RedHat. What I really needed to do: have a server with two HBA’s manage a mirror which has submirrors on separate SAN’s; so that the server has multiple paths to each [...]

Posted on November 27, 2009 at 22:40 by somedude · Permalink · Leave a comment
In: centos, fibre channel, hp eva, linux, linux tips, multipathing, redhat, san, storage

Mounting Linux NFS share: Not owner

I was trying to mount a RHEL 4 NFS share in Solaris 10. But for whatever reason I just could not seem to get it mounted. It would always come back with “Not owner” error: bash-3.00# mount -F nfs carbon:/media/cdrecorder /mnt/carbon nfs mount: mount: /mnt/carbon: Not owner So, I checked and rechecked my settings with [...]

Posted on October 11, 2009 at 13:03 by somedude · Permalink · Leave a comment
In: centos, linux, linux tips, nfs, redhat, solaris, solaris tips

Network interface bonding in Linux

Bonding Ethernet interfaces in Linux is pretty straight forward. There is bunch of articles out there on it already, but since this is where I keep some of my notes, I decided to write a post on it. Plus I do not have to bother with Google and I can come straight here for instructions. [...]

Posted on May 4, 2009 at 15:42 by somedude · Permalink · Leave a comment
In: centos, linux, linux tips, networking, redhat