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CentOS 7 through nmcli team to achieve multiple network card binding

CentOS 7 through nmcli team to achieve multiple network card binding

nmcli con add type team con-name team0 ifname team0 config ‘{“runner”:{“name”:”roundrobin”}}’

Run ip link command to view the interface available in the system 1, create a bond card nmcli con add type team con-name team0 ifname team0 config ‘{ “runner”: { “name”: “roundrobin”}}’ various […]

OS Tunining

CentOS and RHEL Performance Tuning Utilities and Daemons Tuned and Ktune

Tuned is a daemon that can monitors and collects data on the system load and activity, by default tuned won’t dynamically change settings, however you can modify how the tuned daemon behaves and allow it to dynamically adjust settings on the fly based on […]

Performance Tuning in centos7

Performance Tuning in centos7 Tuned

In RedHat (and thus CentOS) 7.0, a daemon called “tuned” was introduced as a unified system for applying tunings to Linux. tuned operates with simple, file-based tuning “profiles” and provides an admin command-line interface named “tuned-adm” for applying, listing and even recommending tuned profiles.

Some operational benefits of tuned:

File-based configuration – […]

How-to extend a root LVM partition online

How-to extend a root LVM partition online

This guide will explain you how to extend a root LVM partition online.

There is also a quick remedy for the emergency situation when your root partition runs out of disk space. There is a feature specific to ext3 and ext4 that can help the goal of resolving […]

Firewalld Centos-7

As of Centos7 the default firewall application has changed from iptables to firewalld. FirewallD provides dynamic filterinc versus static ones in iptables. You can read more about details of the features included at Fedora project page here and or on their official homepage here.

This page will help me to unlearn the iptables and remember […]

Disable or enable the IPv6 protocol

Disable or enable the IPv6 protocol

Disabling IPv6 support in Red Hat Enterprise Linux 7

Disable ipv6 built-in kernel module.

Edit /etc/default/grub and append ipv6.disable=1 to GRUB_CMDLINE_LINUX like the following sample: Raw

GRUB_CMDLINE_LINUX=”rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.lv=rhel/root ipv6.disable=1″

Run the grub2-mkconfig command to regenerate the grub.cfg file: Raw

# grub2-mkconfig -o […]

Compare Linux XFS vs EXT4 File System

Linux Operating System has lots of different file system alternatives, with all the existing default is commonly used ext4. File systems are generally utilized in order for handling how the information is kept soon after any program no longer is utilizing it, how accessibility to the information is managed, what other information (metadata) is linked […]

Kdump for Linux Kernel Crash Analysis

Kdump is an utility used to capture the system core dump in the event of system crashes. These captured core dumps can be used later to analyze the exact cause of the system failure and implement the necessary fix to prevent the crashes in future. Kdump reserves a small portion of the memory for the […]

YUM SERVER

YUM SERVER

#################### Y U M S E R V E R ####################

[root@server~]#vi /etc/hosts

192.168.10.253 server.example.com server

[root@server~]#rpm -qa | grep yum #require packages

yum-3.0.1-5.el5 yum-metadata-parser-1.0-8.fc6 yum-rhn-plugin-0.4.3-1.el5 yum-updatesd-3.0.1-5.el5

[root@server~]#rpm -qa | grep createrepo

createrepo-0.4.4-2.fc6 # To create repository

[root@server~]#rpm -qa | grep vsftpd #FTP service for yum server

vsftpd-2.0.5-10.el5

#service vsftpd restart #chkconfig […]

Kdump for Linux Kernel Crash Analysis

Kdump for Linux Kernel Crash Analysis

Kdump is an utility used to capture the system core dump in the event of system crashes. These captured core dumps can be used later to analyze the exact cause of the system failure and implement the necessary fix to prevent the crashes in future. Kdump reserves a […]