One of the prime job of Unix administrators will be extending and reducing the volumes/filesystems according to the application team requirement.In Veritas volume manages,we carry out such a tasks in online without un-mounting the filesystems. To increase or reduce the filesystem, you need to add or remove the disks from the diskgroup in vxvm. But in ZFS, once […]
Oracle Solaris
How to Create a Virtual switch on Solaris11 ? How to Use it ?
Oracle Solaris 11 introduces a one of the new network virtualization component is called Virtual switch.There are two type of virtual-switches are available in Solaris 11. First type is, when you create a first VNIC on the system,it will automatically creates a virtual switch in the background for external network communications.The second type of virtual switch can be created by using “etherstub” command for […]
What is GUDS ? When/How to Run on Solaris Host ?
There is no operating systems in the world without performance issues. Issue may happen due to poor system design or poor application configuration. As an Unix administrator, we will be always responsible to identify issues on the system and only Unix admin can identify it.But not all the time,Unix administrators can fix the issues and sometimes they […]
Solaris 11 – How to Create VNIC and Assign a IP ?
How to assign Static IP address in Solaris 11? Is it possible to assign multiple IP address to NIC ? First we will the basic difference between older version of Solaris and Solaris 11.In Solaris 10, according to the NIC manufacturer,physical network interfaces are named (Ex:bge,e1000g,nxge).But in Solaris 11 onwards,the inconsistencies names are hidden from the view and all the interfaces will be […]
SOLARIS 11 – Link aggregation vs IPMP ? How to Configure it?
How many of the Solaris administrator knows the difference between link aggregation and IPMP (IP Multi-pathing) ? Even i don’t know the difference till last month.But I was in situation to choose between IPMP and Link aggregation for one of the server.Then I have read the Solaris 11 manuals and finally find out the difference between both. Both IPMP and Link aggregation increase […]
How to configure Solaris 10 IPMP ?
This article describes how to configure link based IPMP interfaces in Solaris 10. IPMP eliminates single network card failure and it ensures system will be always accessible via network.You can also configure the failure detection seconds in “/etc/default/mpathd” file and the default value is 10 seconds.In this file there is an option called “FAILBACK” to […]
wireshark – How to analyse captured network data ?
Network troubleshooting is most difficult part in Unix Administration.To get resolve these network issues ,you need good support from network team .You never know where the problem resides on network issues since many hardwares involved like NIC,switch,cables, routers and firewalls. Most of the network issues are intermediate and you never know when it will happen again.So you need to […]
How to reduce the Security risk in Solaris ? – Generic OS Hardening steps
Is your Solaris environment is secure enough ? How can we tighten the system security ? Here we will see some basic Hardening steps for Solaris OS.Every organization should maintain hardening checklists of each operating systems which they are using it.Before server is bringing to operation/production, hardening check list needs to be verified by support […]
Solaris ZFS – Interview Questions
As we know Oracle made ZFS is a default root filesystem from Solaris 11 onwards. This shows their future plans of improving ZFS and making it as worlds best volume manager cum filesystem in near future.Customers would like to have ZFS in their environment since its a inbuilt volume manager and there is no additional operating cost unlike VXVM. They preferred […]
How to add ZPOOL-ZFS to Solaris local zones ?
Oracle is marketing Oracle’s ZFS(Zeta Byte filesystem) is the next generation filesystem. If you say next generation filesystem,will it be enhanced to support OS virtualization ? Yes.It is.Unlike VXVM, we can delegate the entire zpool to local zones.So that we can manage the entire zpool from the local zone level without logging in to global zone.It includes creating […]