Solaris system state or init states refer to the level of services provided by the system on that specific run-level.Normally SVR4 systems has 7 run levels and Solaris too has that.(S)tart files, (K)ill files: In unix ,runlevel will define what are the process need to start in OS startup according to which run level defined in the /etc/inittab file.For example, in initab […]
VI Editor- Command Reference
“vi” is powerful editor which is available in Unix/Linux to edit the text files.Its an command oriented text editor. It has three modes. 1.Insert mode.2.command mode. 3.last line mode.Once you open a file using vi,it opens the file in command mode,which will allow you to move the cursor quickly within a file.Insert mode allows you to enter a new text and modify […]
Live upgrade patch installation before OS patching
If you want to use Liveupgrade feature on oracle Solaris 10, Oracle recommends to patch the Liveupgrade packages to the latest version since lot of bugs with old patch versions. For me Liveupgrade patch (121431-54) gave lot of trouble after booting from alternative boot environment. I have used the patch version 121431-74 which worked like charm.The logs below will show you that how […]
Unix File’s – hard link and soft link
In Unix, links allow more than one file name to refer to the same file.In windows terminology,we use to call it as shortcut. (soft link).Link will not consume any disk space.It will just refer the source file.In Solaris,if you want to see soft links just go to /etc/rc2.d or /etc/rc3.d directory.You can find most links […]
How to add new filesystem in VCS cluster ?
How to add a new filesystem on Veritas Cluster? Once the filesystem is provisioned, we will be adding it in vfstab/fstab to mount if it’s a non-cluster filesystem. On Cluster nodes, Most of the application filesystem will be managed under cluster to mount the filesystem. This will ensure that filesystem will be mounted during the […]
Veritas cluster concepts
VCS Basics A single VCS cluster consists of multiple systems connected in various combinations to shared storage devices. VCS monitors and controls applications running in the cluster, and restarts applications in response to a variety of hardware or software faults. Client applications continue operation with little or no downtime. Client workstations receive service over the […]
How to fix the corrupted VXFS Filesystem with Symantec help
Recently i have faced strange issue in HP-UX v11.31 with VXVM 5.0 . When we tried to extend one of the file system,vxresize command returns the following error messages. UX:vxfs fsadm: ERROR: V-3-20295: device record checksum is invalidUX:vxfs fsadm: ERROR: V-3-20291: could not initialize devicesVxVM vxresize ERROR V-5-1-7514 Problem running fsadm command for volume test5, in […]
How to use the mirror VXVM volume for backout reason
Normally Unix admin will come across the root volume back-out.Here we are going to see how to perform data volume back-out on veritas volume manager’s mirrored volume.For an example, database team wants to restore the DB but you want to preserve current copy of the volume before the restore starts.This can be done if you are using […]
cfg2html on Solaris – OS configuration Backup
cfg2html is very use full script to take all the system configuration backup in text format and html format.This script is available for Solaris,various Linux flavors and HP-Unix. For more information about the script,please visit http://groups.yahoo.com/group/cfg2html. Once you run the script by default it will generate three files. 1. System configuration in text format 2. System configuration in […]
Performance issues-Solaris Part2-CPU
If its comes to performance issue in Unix operating systems, everybody will be behind on CPU.But not all the time CPU will cause for the performance problem. Because sometimes CPU may waiting for resources like Disk I/O, Swapping ,Network.As sysadmin you should able to pin point where the problem.vmstat is very useful command to determined where it the problem. After introduction Solaris zones, […]