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CentOS/RHEL

How to monitor NVME drives on Centos 6

by admin

Recently, one of our customers asked us to upgrade his server hardware. Unfortunately, they can’t update their software and We had to install Centos 6 with new NVMe drives. But, We need to monitor them and default smartmontools don’t support NVMe on Centos 6.X. Also, you can read about how to install smartmontools in the […]

Filed Under: CentOS/RHEL, Linux

Monitor HDD and SSD with smartd and smartctl

by admin

Basic information smartd is a daemon that monitоrs the Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T) system that is built into most ATA/SATA and SCSI/SAS drives and solid-state drives. smartctl is a command-line utility designed to perform SMART tasks such as printing the SMART self-test and error logs, enabling and disabling SMART automatic testing, and initiating […]

Filed Under: CentOS/RHEL, Linux

Intel I219-LM Centos 6 network failed to start

by admin

Introduction If you are using old software on new software you can receive some weird errors. Today We will describe an error with Inle l219-LM and CentOS 6 error. For some reason from time to time, Centos 6 fails to start network when using the Intel I219-LM network card. We’ve faced the following issue with […]

Filed Under: CentOS/RHEL, CentOS/RHEL 6, Linux

How To Install Python 3 On CentOS 7 Using SCL

by admin

Introduction Python is an interpreted, high-level, general-purpose programming language. Created by Guido van Rossum and first released in 1991, Python’s design philosophy emphasizes code readability with its notable use of significant whitespace. Its language constructs and object-oriented approach aim to help programmers write clear, logical code for small and large-scale projects. It’s an incredible programming […]

Filed Under: CentOS/RHEL, Linux

CentOS/RHEL7 – Tuned Profiles Oracle

by admin

Tuned is a set of tools and a daemon that tunes your system’s settings automatically depending on its usage. It periodically collects data from its components through plugins, which it uses to change system settings according to the current usage. You can find the system’s tuned profiles used in /lib/tuned/. When you create your own, […]

Filed Under: CentOS/RHEL, CentOS/RHEL 7, CentOS/RHEL 8, Linux, oracle

tuned-adm and Oracle

by admin

To offer the best possible performance right from the start, CentOS/RHEL 7 and 8 come with tuned. It offers a daemon that monitors system activity and provides some profiles. In the profiles, an administrator can automatically tune a system for the best possible latency, throughput, or power consumption. Based on the properties of an installed […]

Filed Under: CentOS/RHEL, CentOS/RHEL 7, CentOS/RHEL 8, Linux, oracle

“-bash: route: command not found” on CentOS/RHEL 7

by admin

The route command is used to show/manipulate the IP routing table. The simplest command with ‘route’ is to run it without any options or arguments which will return the IP routing table. The equivalent command with ip is as follows: $ ip r where r stands for route. The route command was deprecated in CentOS […]

Filed Under: CentOS/RHEL, CentOS/RHEL 7, Linux

How to Add or Remove Ports when firewalld is Disabled

by admin

There may be a case when you need to add or remove ports when firewalld is disabled. In such cases “firewall-offline-cmd” can be used as it is an offline command-line client of the firewalld daemon. A port can be added or removed via firewall-offline-cmd in case firewalld is not active. Note: Please make sure to […]

Filed Under: CentOS/RHEL, Linux

firewall-offline-cmd Command Examples in Linux

by admin

firewall-offline-cmd is an offline command-line client of the firewalld daemon. It should be used only if the firewalld service is not running. A port can be added or removed via firewall-offline-cmd in case firewalld is not active. firewall-offline-cmd Command Examples 1. For adding a port: # firewall-offline-cmd –port=XXXX:tcp 2. For removing a port: # firewall-offline-cmd […]

Filed Under: CentOS/RHEL, Linux

lvsd Command Examples in Linux

by admin

lvsd is a daemon to control the Red Hat clustering services. lvsd reads in the cluster configuration file lvs.cf, calls ipvsadm to maintain the IPVS routing table, and nanny to perform monitoring services. lvsd Command Options

Filed Under: CentOS/RHEL, Linux

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