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....
Blog for Unix Admin / Solaris Admin / Solaris Performance Monitoring / Video Learning / Video Posts
by Ramdev · Published March 30, 2021
This Video presents you the procedure to investigate various performance bottlenecks related to Memory, CPU and IO using the commands iostat, vmstat and prstat.
In Simple Terms, Shared memory is chunk of memory that can be shared by multiple processes. An application acquires shared memory by making a system call similar to what it would make to acquire conventional memory. The only difference is that each chunk of shared memory...
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