Install MySQL 8.0 on Centos 7

Steps to install MySQL 8.0 Community Edition in Centos 7

1. Enable MySQL 8.0 Repository
sudo yum localinstall https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
2. Install MySQL 8.0 using Yum sudo yum -y install MySQL-community-server 3. Enable to start at boot sudo systemctl enable mysqld
    sudo systemctl start mysqld
    sudo systemctl status mysqld 4. Get temporary root password sudo grep 'temporary password' /var/log/mysqld.log 5. Secure MySQL installation
    sudo mysql_secure_installation 6. Try to run MySQL client: mysql -u root -p

That's all folks!  6 steps only.

Fyi, I referred to https://linuxize.com/post/install-mysql-on-centos-7/ for this.

Restore MySQL Enterprise Backup File

Restore MySQL Enterprise Backup File

1. Shutdown MySQL server

mysqladmin -u root -p shutdown

2. Restore MySQL Backup

./mysqlbackup --defaults-file=/etc/MySQL/my.cnf --datadir=/var/lib/MySQL --backup-image=/srv/db_backup/my.mbi --backup-dir=/srv/db_backup/restore-tmp copy-back-and-apply-log --force --uncompress

3. Update file permission

chown -R mysql:mysql /var/lib/MySQL

4. Start MySQL

service start MySQL

5. Check your MySQL data to ensure that it's been successfully restored.

That's all folks!  5 steps only.  I've restored 16GB of compressed my.mbi backup file in less than half an hour.
Fyi, I referred to https://dev.mysql.com/doc/mysql-enterprise-backup/4.1/en/mysqlbackup.restore.html for this.

Install WSO2 Identity Server 5.7.0 on Centos 7 x64

Pre-requisites:
OpenJDK8 or Oracle JDK 1.8.*

Steps:
1. Download WSO2 Identity Server from WSO2 Website:

https://wso2.com/identity-and-access-management/install/

2. Install WSO2 Identity Server

rpm -i wso2is-linux-installer-x64-5.7.0.rpm

3. Download and install Apache Tomcat version 8 or above
I installed Apache Tomcat 9 which I downloaded from Apache Tomcat 9 Core Download (tar.gz)

tar xvf apache-tomcat-9.0.14.tar.gz

4. Download and install curl
I installed it using yum

yum -y install curl

5. Create a Twitter application to try out multi-factor or federated authentication
a. Go to https://twitter.com/ and create an account
b. Register for Twitter Developer account

I applied for it on 31 Jan 2019 6.00pm GMT+8.  Will update here when it is approved).

Update: My Twitter Developer Account was approved 1 Feb 2019 11.43pm GMT+8.  Twitter first responded asking for more info on 31 Jan 2019 10.24pm GMT+8 but I didn't notice the email and only replied back on 1 Feb 2019 11.25pm GMT+8.  So, it's either I was very lucky to have gotten a very fast response or Twitter is super efficient in handling these developer accounts application because I think there would be like thousands of application per day from all over the world everyday!  Anyway, thanks to Twitter for approving my developer account.)

c. Register a new application on Twitter at https://apps.twitter.com You can use the following url as the Callback URL for your Twitter application: https://localhost:9443/commonauth

d. Note down API key and secret for later use.

6. Open the /etc/hosts file and add the following entry
127.0.0.1     localhost.com

7. Start WSO2 IS

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/
export WSO2IS_HOME=/usr/lib64/wso2/wso2is/5.7.0/

cd $WSO2IS_HOME/bin
sudo ./wso2server.sh

8. Open firewall port if firewalld is active in Centos 7

firewall-cmd --permanent --add-port=9443/tcp
firewall-cmd --list-ports

List the services that are accepted through the firewall:
firewall-cmd --list-services

Install TeamViewer on Centos7

1. Get the RPM Package

    wget https://download.teamviewer.com/download/linux/teamviewer-host.x86_64.rpm

2.  Install EPEL Repository

    sudo yum -y install epel-release

3. Install TeamViewer

    sudo yum -y install ./teamviewer-host*.rpm

That's all folks!  3 steps only.

Fyi, I referred to https://community.teamviewer.com/t5/Knowledge-Base/How-to-install-TeamViewer-on-Red-Hat-and-CentOS/ta-p/30708 for this.

Install FileZilla FTP Client on Centos7

1. Enable EPEL Repository

    sudo yum -y install epel-release

2. Install FileZilla

    sudo yum -y install filezilla


That's all folks.  2 steps only.

Fyi, i referred to http://sysadmindata.com/install-filezilla-centos-7/ for this.

Install Google Chrome on Centos7

1. Enable Yum Repository

    sudo vi /etc/yum.repos.d/google-chrome.repo

    Add the following:

    [google-chrome]
    name=google-chrome
    baseurl=http://dl.google.com/linux/chrome/rpm/stable/x86_64
    enabled=1
    gpgcheck=1
    gpgkey=https://dl.google.com/linux/linux_signing_key.pub

2. Install Google Chrome

    sudo yum install google-chrome-stable

That's all folks.  2 steps only.

Fyi, I referred to https://www.cyberciti.biz/faq/howto-install-google-chrome-on-redhat-rhel-fedora-centos-linux/ for this.

Installing Visual Studio Code on Centos7

1. Enable Yum Repository

     sudo vi /etc/yum.repos.d/vscode.repo

     Add the below:

     [vscode]
     name=Visual Studio Code
     baseurl=https://packages.microsoft.com/yumrepos/vscode
     enabled=1
     gpgcheck=1
     gpgkey=https://packages.microsoft.com/keys/microsoft.asc

2. Import the package signing GPG key

     sudo rpm --import https://packages.microsoft.com/keys/microsoft.asc 

3. Install Visual Studio Code


     sudo yum check-update
     sudo yum install code


That's all folks! 3 steps only.


Fyi, I referred to https://tecadmin.net/install-visual-studio-code-editor-in-fedora/ for this.

My To Read List:

Java JWT Token Tutorial using JJWT Library

Over a quarter of employees don't know company protocol for sharing business info

Enterprise is dead, long live Agile!

Building Docker Intuition

SEI CERT releases open-source Source Code Analysis Laboratory for pinpointing vulnerabilities

Architecture with Docker for Two-tier Application

MVVM in Flutter using ScopedModel

SSO for your Single Page Application (part 1/2 — AngularJS)

https://stackoverflow.com/questions/8176001/trouble-creating-active-directory-users-with-java

https://www.youtube.com/watch?v=qs2n_poLarc

Drop database and then restore (Postgresql 10.4.0):

1. su as postgres

2. run psql at command prompt

3. First, find the activities that are taken place against the target database, you can query the pg_stat_activity view with the following query:

SELECT
 *
FROM
 pg_stat_activity
WHERE
 datname = 'target_database';

4. Second, terminate the active connections by issuing the following query:

SELECT
 pg_terminate_backend (pg_stat_activity.pid)
FROM
 pg_stat_activity
WHERE
 pg_stat_activity.datname = 'target_database';

5. Third, execute the DROP DATABASE statement:

DROP DATABASE target_database;

6. Create database:

CREATE DATABASE target_database;

7. Copy file from host to docker container:

docker cp src/. mycontainer:/target

8. Go into docker container and restore database:

docker container exec -it mycontainer bash
su postgres
psql target_database < infile

That's all folks!

After Jenkins successfully shutdown, my Gitlab CE is now using port 8080 so I need to shut it down also to make way for my WildFly Application Server.  Command issued to shutdown Gitlab CE are as follows:

1.  su as root

2. At command prompt: gitlab-ctl stop

Referred from here: https://docs.gitlab.com/omnibus/maintenance/

That's all folks!

My Jenkins Server automatically starts upon Centos 7 server starts, so I need to stop it to make way for my WildFly Application Server.  What I did to stop it are as follows:

1. On my Firefox browser, go to this url : http://localhost:8080/exit

2. It will ask me to login then i have to click some button to initiate the shutdown process

I saw someone also asking about the same thing at stackoverflow: https://stackoverflow.com/questions/10238604/how-to-shutdown-my-jenkins-safely/35922474

It's that easy folks!