Know about Netapp Snapvault
cloudibee Netapp SnapVault is a heterogeneous disk-to-disk backup solution for Netapp filers and systems with other OS (Solaris, HP-UX, AIX, Windows, and Linux). In event of data loss or corruption on…
Linux
AIX : Managing service subsystem
lssrv , stopsrc and startsrc are used to manage service subsystem in AIX. lssrc lists out all services that are active and inactive. “startsrc” and “stopsrc” are used to start…
Netapp VIFs loadbalancing
NetApp loadbalancing algorithm for determining ethernet load balancing (vifs) differs from Cisco, so it’s normal to see unbalanced traffic in Netapp vifs. The Cisco method for determining load balancing is…
Steps to create initrd
Creating initrd using mkinitrd # mkinitrd -v -f –with=e1000 /tmp/initrd.gz 2.6.9-55 Extracting the initrd image to add contents in it # mkdir /initrdroot# cd /initrdroot# gzip -dc /tmp/initrd.gz | cpio…
Resizing ext3 filesystem
The ext3 filesystem on Linux can be resized using ext2online . This can only be done when the filesystem is online (mounted) and where the the filesystem is on a…
Windows provisioning from PXE
Two opensource solutions through which you can provision Windows servers by network booting from a Linux PXE : http://unattended.sourceforge.net/http://unattended-gui.sourceforge.net/ Good one & they worked for me.
NFS mount options
Some important nfs mount options in Linux. tcp – Specifies for the NFS mount to use the TCP protocol instead of UDP. rsize=8192 and wsize=8192 – These settings speed up…
Netapp Flexshare
A very good demo on Netapp Flexshare and how it impacts performance : http://www.netapp.com/ftp/flash/flexshare-demo/flexshare_demo.html
Know about /proc/meminfo
/proc/meminfo is one of the more commonly used files in the /proc/, as it reports a large amount of valuable information about the Linux system’s memory. Here is the brief…
Converting ext2 filesystem to ext3 filesystem
ext3 filesytem is a journal’d filesystem. The command “tune2fs“ can add a journal to an existing ext2 file system and convert it to ext3, without altering the data already on…
Network bonding : Part II ( modes of bonding )
The steps for creating network boding in Linux is available in http://unixfoo.blogspot.com/search/label/networking. RHEL bonding supports 7 possible “modes” for bonded interfaces. These modes determine the way in which traffic sent…
How to configure Linux machine as router?
Here are some simple steps to do it, using Network Address Translation (NAT) Enable packet forwarding . Make it permanent by adding “net.ipv4.ip_forward = 1” to /etc/sysctl.conf echo “1” >…
AIX tips : Switching to 64-bit kernel
The AIX kernel is available in 32-bit or 64-bit mode. If a 32-bit kernel is running and you want to switch to 64-bit kernel , use the following command. (…
Sticky bit
What is the “sticky bit”? (t and T) The sticky bit is primarily used on shared directories. It is useful for shared directories such as /var/tmp and /tmp/ because users…
Linux Benchmarking tools
Here is a list of few benchmarking tools put together Bonnie++ : This is a benchmark suite that is aimed at performing a number of simple tests of hard drive…