Unix Admins would like to have one of the best ssh/telnet tools on their desktop.If we say best tools, what are the features it should have by default? Now a days there are many tools available in market which are coming with great features.These ssh tools should have session log saving feature and also it […]
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 […]
SAN/NAS – 10 FREE STORAGE APPLIANCES
Storage virtualization brought many advanced features to SAN/NAS world.SAN/NAS appliance moved one step forward and made any system can be act as virtual SAN/NAS box.For an example using openfiler, you can provision LUNS and assign to any server using ISCIS protocol.The same way it can act like NAS filer as well.Here I have list down […]
How to configure bonding/teaming on Redhat Linux 6 ?
All the system admin would like to avoid server outage by having redundancy for root filesystem using mirroring, Multiple FC links to SAN with help of multi-pathing and many more.So here the question is how do you provide redundancy in network level ? Having a multiple network card will not give any redundancy.In redhat Linux you need to configure bonding […]
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 scan new FC LUNS and SCSI disks in Linux ?
How to scan new FC LUNS and SCSI disks in Redhat Linux without rebooting the server? Most of the Linux beginners have to wonder how to do this and this article will be for them. It may look very simple as we perform this in daily operation to scan LUNS but the system has much work […]
RSYNC – sync the data between two servers using script
How to sync the data between two servers without using SAN replication ? Do you have better than RSYNC tool for this job ? I don’t think so, you we will not get better than RSYNC. It uses ‘rsync algorithm’ which provides a very fast method for syncing the directories or filesystems. An important feature of […]
Solaris 11 – New Features & Capabilities of Zones
Solaris 11 zones have some many differences from Solaris 10 zones.Oracle tried to make zone as completely independent virtual machines and they succeed on that.Oracle introduced many utilities and new features in Solaris 11 local zones.some of the key features are, 1. zonestat 2. beadm in zones 3. anet, the new auto-configuring zone network interface […]
Solaris Zone’s shutting down state
As you know that Solaris zones are not completely isolated from Solaris global zone.All of the local zones will be considered as global zone’s instances and it all depends on global zone’s kernel.For an example,you can see all the local zone process from global zone using “ps -efZ” command and that shows that zones are not completely isolated from […]
Solaris – Scenario Based Interview Questions
I have seen many of the candidates are very good in theoretical but they will struggle to answer scenario based and ITIL process based questions in Unix interviews. By just reading the text books and remembering commands won’t work. You need to apply your logical skills to succeed there.Be confident on what you know and […]