Showing posts with label centos. Show all posts
Showing posts with label centos. Show all posts
Tuesday, October 17, 2017

Centos 7: install epel and speedtest-cli

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To install epel # yum install epel-release To install speedtest-cli # yum install python2-speedtest-cli To run speedtest-cli # spe...
Tuesday, May 2, 2017

Centos 6: csf blocking whois

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symptom: # whois google.com [Querying whois.verisign-grs.com] [Unable to connect to remote host] To solve this problem, edit /etc/c...
Friday, April 7, 2017

Centos 6/7: using needs-restarting after yum update

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Install yum utility # yum install yum-utils Some update require system to restart or some services to restart. To determine system needs...
Monday, January 23, 2017

Centos ConfigServer Security & Firewall

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Download latest CSF & LFD from  https://download.configserver.com/csf.tgz, extract it and install it: # wget https://download.configs...
Friday, August 5, 2016

Fix IP address after kernel 3.10.0-327.28.2.el7.x86_64 upgrade on Centos 7 (KVM Guest)

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symptom: after schedule restart due to kernel upgrade to 3.10.0-327.28.2.el7.x86_64, something wrong happen to our guest KVM. Some network ...
Saturday, May 14, 2016

Centos 7: installing deltarpm (Delta RPMs disabled)

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Symptoms: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. Centos 7 with minimal installation does not include deltarp...
Saturday, April 23, 2016

WHM/CPanel Centos 7: enabling ipset in csf

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Prerequisite: Iptables & Ipset Serverconfig v7.54 or later Follow WHM/CPanel centos 7: blocking brute force attack to replace fi...
Sunday, April 17, 2016

WHM/CPanel Centos 7: blocking brute force attack

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By default, Centos 7 use firewalld to manages net filter rules. Just like iptables, adding new rules may increase your cpu load. This is m...
Monday, January 18, 2016

Centos 6 bridge network

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Directory /etc/sysconfig/network-scripts/ Note: Instead of turning off NetworkManager , add "NM_CONTROLLED=no " to the ifcfg-* . E...