Linux Tips, Hacks, Tricks, and Tutorials
1) pwd command ඔබ සිටින වත්මන් වැඩ කරන ඩිරෙක්ටරියේ (ෆෝල්ඩරයේ) මාර්ගය සොයා ගැනීමට pwd විධානය භාවිතා කරන්න . [prabath@mail ~]$ pwd /home/prabath 2) cal command වත්මන් මාසයේ දින දර්ශනය පෙන්වයි. [prabath@mail ~]$ cal November 2020 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 […]
Before you Begin Complete the steps for setting your Server / VPS hostname and timezone. Complete the steps in our Securing Your Server guide to create a standard user account, harden SSH access, and remove unnecessary network services. Update your server’s software packages:CentOS sudo yum update && sudo yum upgrade Debian / Ubuntu sudo apt […]
What is Fail2Ban? Any service that is exposed to the internet is susceptible to attacks from malicious parties. If your service requires authentication, illegitimate users and bots will attempt to break into your system by repeatedly trying to authenticate using different credentials. A common example of this is with SSH, which will be the subject […]
Download Source File This PHP API script reads Nagios status.dat file and return the JSON result. This API is desinged for Nagios Client unofficial Nagios status monitoring app. Step 1 Upload nath_status.php to your Nagios web root folder. ###Nagios Core’s 3.5.1 default Web Root folder Web Root Folder – Centos /usr/share/nagios/html/ ###Nagios Core’s default Web Root folder Web […]
If that’s what you want to do, the following hack will do it (it looks like a cleaner solution would require figuring out where the [SIGNATURE] in the email template is coming from and removing that). These instructions are for phplist version 2.10.2. Search lists/admin/sendemaillib.php for $text[“signature”] = “\n\n–\nPowered by PHPlist, www.phplist.com –\n\n”; Immediately after that line, add the line (or replace […]
This is the full step-by-step procedure to resync a master-slave replication from scratch: At the master: And copy the values of the result of the last command somewhere. Without closing the connection to the client (because it would release the read lock) issue the command to get a dump of the master: Now you can release the […]
Enviroment: – Server01.192.168.30.201 – Server02.192.168.30.202 – Directory to be Sync : “/opt/web/htdocs/prompt and /opt/vxml ” 2.Step Key based authentication Configuration -Login to Master server & generate the public and Private keys using the following command: [root@server01 ~]# ssh-keygen -t rsa [root@server01 ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.30.202 2.Step Installation Lsyncd [root@server01 ~]# yum install epel-release [root@server01 […]
Backup all the database and stop mysql mysqldump -u (userid) -p (password) –all-databases > all-databases.sql service mysqld stop Download the Repo for MySql 5.6 wget http://dev.mysql.com/get/mysql-community-release-el6-3.noarch.rpm/from/http://repo.mysql.com/ Install the repository from the local file yum localinstall mysql-community-release-el6-3.noarch.rpm Install the latest MySql yum install mysql-community-server service mysqld start Configure MySQL to start automatically on Server Reboot chkconfig […]
Prerequisites 2 or more CentOS 7 Serverpre web01 10.0.15.10 web02 10.0.15.11 web03 10.0.15.12 Floating IP Address 10.0.15.15 Root Privileges What we will do: Map the Host File Install Epel Repository and Nginx Install and Configure Pacemaker, Corosync, and Pcsd Create and Configure the Cluster Disable STONITH and Ignore the Quorum Policy Add the Floating-IP and […]
Networking: We have two nodes that are reachable by below Networks: 10.1.1.0/24 : Cluster heartbeat vlan. 172.16.1.0/24 : LAN with access to the Internal LAN network and Internet. We have set the following hostnames: [master ~]# hostnamectl set-hostname master.sysadmin.lk [client ~]# hostnamectl set-hostname client.sysadmin.lk We defined the Hostname and IP Address in “/etc/hosts” file(On both […]