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...
Linux Admin / Linux Performance / Redhat Enterprise Linux 6 / Redhat Linux Kernel / Unix Intermediate
by Ramdev · Published April 3, 2021
What is Page cache ? When a user process reads or writes a file, it is actually modifying a copy of that file in main memory. The kernel creates that copy from the disk and writes back changes to it when necessary. The memory taken up...
Docker is the world’s leading software container platform. Developers use Docker to eliminate “works on my machine” problems when collaborating on code with co-workers. Operators use Docker to run and manage apps side-by-side in isolated containers to get better compute density. Enterprises use Docker to build...
‘od’ writes an unambiguous representation of each FILE (‘-‘ means standard input), or standard input if none are given. Synopses: od [OPTION]… [FILE]… od [-abcdfilosx]… [FILE] [[+]OFFSET[.][b]] od [OPTION]… –traditional [FILE] [[+]OFFSET[.][b] [[+]LABEL[.][b]]] Each line of output consists of the offset in the...
Introduction to Grep `grep’ searches input files for lines containing a match to a given pattern list. When it finds a match in a line, it copies the line to standard output (by default), or produces whatever other sort of output you have requested with options....
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