Linux tutorials / Performance Analysis / Recent Posts / Redhat Enterprise Linux 6 / RHEL7
by Shujat Husain · Published April 12, 2021
For every system admin, making sure that all the servers are working fine is an important aspect of the job. So if you have a few servers, we can run commands like top or df -h or free -m to make sure that our CPU, HDD...
Blog for Unix Admin / Solaris Admin / Solaris Troubleshooting / SUN Hardware
by Ramdev · Published April 11, 2021
Step 1)Â What is exact cause of system hang (system, RSC, network)
What is a patch? A patch fixes problems that prevent the proper execution of software. It is a collection of files and directories that replace or update existing files/binaries and directories. The entire OS is installed as a collection of Solaris packages. It is done during...
For Solaris 8 hosts the common multipathing product is VxDMP or EMC PowerPath. And for  Solaris 10 hosts it can be MPxIO (the majority), VxDMP or EMC PowerPath. It is important to note that both VxDMP and MPxIO can be active at the same time;...
Blog for Unix Admin / Solaris Admin / Solaris Disk Management / SUN Hardware / Veritas Administration for unixadmin / VxVM Learning
by Ramdev · Published April 8, 2021
Hot swapping of a failed disk is fairly straight procedure if the disks are regular SCSI disks, but for the Fibre Channel (FC) disks we should follow different procedure for hot swaping. Below specific procedure should be used when replacing one of the internal disks in...
Blog for Unix Admin / Solaris Admin / Solaris Troubleshooting / SUN Hardware
by Ramdev · Published April 8, 2021
System Administrators encounter frequent issues with onboard PCI slots after the maintenance operations like the OS upgrades, patch installations and firmware upgrades. And often it will leave us in a situation that we couldn’t boot up the machine, because of the issues to recognize PCI slots after...
Ansible is an open source automation platform. …Ansible can help you with configuration management, application deployment, task automation. It can also do IT orchestration, where you have to run tasks in sequence and create a chain of events which must happen on several different servers or...
1. Network does not start due to “Device not managed by Network-Manager” error. Generally, this error occurs when the ethernet cable does not connect to the interface well and the interface is not configured properly. The solution for this issue is to ensure the link...
Solaris Admin / Solaris Disk Management / Solaris Troubleshooting / Storage Administration - SAN / Unix Intermediate
by Ramdev · Published April 5, 2021
It is often possible that we boot from a Solaris machine from one of the root mirror disk, and after sometime we forget current active disk. And the information of active boot disk is important while we perform SVM maintenance disks. This post will help you...
A loop statement can use any other type of command within the loop, including other loop commands. This is called a nested loop. Care should be taken when using nested loops, because you’re performing an iteration within an iteration, which multiplies the number of times commands...
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