How To Install InfluxDB and Telegraf on Oracle Linux Server 9

 InfluxDB is an open-source time series database (TSDB) developed by the company InfluxData.
Telegraf is a server-based agent for collecting and sending all metrics and events from databases, systems, and IoT sensors.
__________________________________________________________________________________________________________________________________
Server - Os:  Oracle Linux Server 9.0   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
__________________________________________________________________________________________________________________________________
cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y

cat <<EOF | sudo tee /etc/yum.repos.d/influxdb.repo
[influxdb]
name = influxdb Repository - RHEL \$releasever
baseurl = https://repos.influxdata.com/rhel/\$releasever/\$basearch/stable
enabled = 1
gpgcheck = 1
gpgkey = https://repos.influxdata.com/influxdb.key
EOF

sudo dnf install influxdb2
sudo systemctl start influxdb ; sudo systemctl enable influxdb ; sudo systemctl status influxdb
sudo firewall-cmd --add-port=8086/tcp --permanent ; sudo firewall-cmd --reload ; sudo firewall-cmd --list-ports
sudo dnf install influxdb2-cli -y
which influx ; influx version

sudo influx completion bash > /etc/bash_completion.d/influx.sh
sudo chmod +x /etc/bash_completion.d/influx.sh
sudo influx TAB
sudo influx setup
sudo influx user list
sudo influx auth list

export INFLUX_TOKEN=OK15O5laLtEr88RFtLE9xtVAN7cNCieQFT_YJ2FYEC5T-fYcZkGyp1A7e_vjhIXUKZDBktaPdH0GUmlVQDzsDQ==
sudo influx v1 shell $INFLUX_TOKEN
show DATABASES
http://192.168.5.100:8086)
alice
__________________________________________________________________________________________________________________________________

HAProxy: Configure HTTP Load Balancing Server in Rocky Linux 8.5

 in This Tutorial you will Learn " HAProxy: Configure HTTP Load Balancing Server in Rocky Linux 8.5"

HAProxy is a free and open source software that provides a high availability load balancer and proxy server for TCP and HTTP-based applications that spreads requests across multiple servers. It is written in C and has a reputation for being fast and efficient.
-----------+---------------------------+--------------------------+-------------
           |                           |                          |
           |192.168.1.20                    |192.168.1.80                 |192.168.1.70
+----------+-----------+   +-----------+----------+   +-----------+----------+
|   [ www.primaryhost.com ]  |     | [ www.tertiary.com ] |   | [ www.example.com ] |
|        HAProxy       |                           Web Server#1    |         Web Server#2    |
_________________________________________________________________________________________
Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
_________________________________________________________________________________________
cat /etc/system-release ; sestatus ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install haproxy
gedit /etc/haproxy/haproxy.cfg &>/dev/null
frontend http-in
    # listen 80 port
    bind *:80
    # set default backend
    default_backend    backend_servers
    # send X-Forwarded-For header
    option             forwardfor

backend backend_servers
    # balance with roundrobin
    balance            roundrobin
    # define backend servers
    server             node01 192.168.1.80:80 check
    server             node02 192.168.1.70:80 check
systemctl enable --now haproxy ; systemctl daemon-reload ; systemctl restart haproxy
systemctl status firewalld
________________________________________________________________________________________
Backends Web server 1-
cat /etc/system-release ; sestatus ; hostname ; hostname -I
dnf install httpd -y
gedit /etc/httpd/conf/httpd.conf &>/dev/null
LogFormat "\"%{X-Forwarded-For}i\" %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
systemctl restart httpd
echo "<h1>This is a Test Page www.tertiary.com</h1>" > /var/www/html/index.html
_________________________________________________________________________________________
Backends Web server 2-
cat /etc/system-release ; sestatus ; hostname ; hostname -I
yum install httpd -y
gedit /etc/httpd/conf/httpd.conf &>/dev/null
LogFormat "\"%{X-Forwarded-For}i\" %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
systemctl restart httpd
echo "<h1>This is a Test Page www.example.com</h1>" > /var/www/html/index.html
_________________________________________________________________________________________

How To Enable HAProxy Stats On Rocky Linux 8.5

 in This Tutorial you will Learn "How To Enable HAProxy Stats On Rocky Linux 8.5"

HAProxy Stats is a useful application that provides useful information about total connection, data transfer, server state and more.

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
_________________________________________________________________________________________
Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
_________________________________________________________________________________________
cat /etc/system-release ; sestatus ; dnf groupinstall "Development Tools" -y
dnf -y install haproxy
gedit /etc/haproxy/haproxy.cfg &>/dev/null
frontend http-in
    # listen 80 port
    bind *:80
    # set default backend
    default_backend    backend_servers
    # send X-Forwarded-For header
    option             forwardfor

backend backend_servers
    # balance with roundrobin
    balance            roundrobin
    # define backend servers
    server             node01 192.168.1.80:80 check
    server             node02 192.168.1.70:80 check
    # enable statistics reports
    stats enable
    # auth info for statistics site
    stats auth admin:adminpassword
    # hide version of HAProxy
    stats hide-version
    # display HAProxy hostname
    stats show-node
    # refresh time
    stats refresh 60s
    # statistics reports URI
    stats uri /haproxy?stats
systemctl enable --now haproxy ; systemctl daemon-reload ; systemctl restart haproxy
http://127.0.0.1/haproxy?stats
________________________________________________________________________________________

How To Install Craft CMS on Rocky Linux 8

 in This Tutorial you will Learn " How To Install Craft CMS on Rocky Linux 8"
Craft CMS is an open source CMS written in PHP. Craft CMS source code is hosted on GitHub.
_________________________________________________________________________________________
Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
_________________________________________________________________________________________
cat /etc/system-release ; sestatus ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf install nginx mariadb-server php php-cli php-fpm php-common php-curl php-gd php-json php-mbstring php-mysqli php-pgsql php-zip php-intl php-xml php-pdo -y

nano /etc/php.ini
memory_limit = 256M

nano /etc/php-fpm.d/www.conf
user = nginx
group = nginx
systemctl start nginx mariadb php-fpm ; systemctl enable nginx mariadb php-fpm

mysql
create database craftdb;
grant all on craftdb.* to craftuser@localhost identified by 'securepassword';
flush privileges;
quit;

mysql_secure_installation

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"

HASH="$(wget -q -O - https://composer.github.io/installer.sig)"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

php composer-setup.php --install-dir=/usr/local/bin --filename=composer

cd /var/www/html/ ; composer create-project craftcms/craft craft
chown -R nginx:nginx /var/www/html/craft ; chown -R nginx:nginx /var/lib/php/session
nano /etc/nginx/conf.d/craft.conf
server {

  listen 80;
  server_name craft.example.com;
  root /var/www/html/craft/web;
  index index.php;


  location / {
    try_files $uri/index.html $uri $uri/ /index.php?$query_string;
  }

  location ~ [^/]\.php(/|$) {
    try_files $uri $uri/ /index.php?$query_string;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass unix:/run/php-fpm/www.sock;
    fastcgi_index index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_param HTTP_PROXY "";
  }

}
nano /etc/nginx/nginx.conf
server_names_hash_bucket_size 64;
systemctl restart nginx

echo "192.168.1.20 craft.example.com" >> /etc/hosts
firewall-cmd --permanent --add-service={http,https} ; firewall-cmd --reload  
craft.example.com
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

How To Install Laravel PHP Framework on Rocky Linux 8

 in This Tutorial you will Learn " How To Install Laravel PHP Framework on Rocky Linux 8"

Laravel is an open-source PHP framework designed for web application development. It is built on various components of the Symfony framework and makes it easier to program PHP web applications. It provides a meaningful and creative syntax for simplifying common tasks such as authentication, routing, sessions, working with databases, and more. It makes development process simple for developers without compromising program capabilities.
_________________________________________________________________________________________
Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
_________________________________________________________________________________________
cat /etc/system-release ; sestatus ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf install nginx mariadb-server php php-fpm php-common php-xml php-mbstring php-json php-zip php-mysqlnd curl unzip -y
systemctl start php-fpm nginx mariadb ; systemctl enable php-fpm nginx mariadb

nano /etc/php-fpm.d/www.conf
listen.owner = nginx
listen.group = nginx

nano /etc/php.ini
date.timezone = UTC
cgi.fix_pathinfo=1

systemctl restart php-fpm
curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer ; chmod +x /usr/local/bin/composer

cd /var/www/html/
composer create-project --prefer-dist laravel/laravel laravelsite
chown -R nginx:nginx /var/www/html/laravelsite/storage/
chown -R nginx:nginx /var/www/html/laravelsite/bootstrap/cache/
chmod -R 0777 /var/www/html/laravelsite/storage/
chmod -R 0775 /var/www/html/laravelsite/bootstrap/cache/

nano /etc/nginx/conf.d/laravel.conf
server {
       listen 80;
       server_name laravel.yourdomain.com;
       root        /var/www/html/laravelsite/public;
       index       index.php;
       charset utf-8;
       gzip on;
    gzip_types text/css application/javascript text/javascript application/x-javascript  image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;
        location / {
        try_files $uri $uri/ /index.php?$query_string;
        }

        location ~ \.php {
                include fastcgi.conf;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/run/php-fpm/www.sock;
        }
        location ~ /\.ht {
                deny all;
        }
}

systemctl restart php-fpm nginx ; systemctl status nginx
firewall-cmd --zone=public --permanent --add-service=http
firewall-cmd --zone=public --permanent --add-service=https
firewall-cmd --reload
nano /etc/hosts
192.168.1.20    laravel.yourdomain.com
laravel.yourdomain.com
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

How To Install Apache Solr on Rocky Linux 8.5

 Apache Solr or Solr is a free and open-source search platform based on the Apache Lucene library. Solr is stands for Searching On Lucene with Replication, it is an enterprise-grade search platform written in Java.
_________________________________________________________________________________________
Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
_________________________________________________________________________________________
cat /etc/system-release ; sestatus ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf install java-11-openjdk java-11-openjdk-devel
java --version
Latest- https://downloads.apache.org/lucene/solr/
wget https://downloads.apache.org/lucene/solr/8.11.1/solr-8.11.1.tgz
tar xzf solr-8.11.1.tgz
solr-8.11.1/bin/install_solr_service.sh solr-8.11.1.tgz

nano /etc/security/limits.conf
soft    nofile        65000
hard    nofile        65000
soft    nproc        65000
hard    nproc        65000
su - solr -c "/opt/solr/bin/solr restart"
firewall-cmd --add-port=8983/tcp --permanent ; firewall-cmd --reload
http://192.168.1.20:8983/solr
http://resolvable-hostname:8983/solr
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

How To install GFortran ( Fortran Programming Language ) & Write a Hello World Program On Ubuntu 20.04

 ________________________________________________________________________________________
How To install GFortran ( Fortran Programming Language ) & Write a Hello World Program On Ubuntu 20.04
________________________________________________________________________________________

FORTRAN is a powerful programming language that is often over-shadowed by the more popular mainstream programming languages.

apt update ; apt-get install gfortran -y
gfortran --version
whereis gfortran ; which gfortran

Fortran Hello World Example: How To Write and Execute Fortran Program on Linux OS
nano helloworld.f
program hello
print *,"Hello World!"
end program hello


shorter Version  -
nano helloworld.f
PRINT *,"Hello World!"
END

Compile the Fortran program - gfortran -ffree-form helloworld.f
Execute the Fortran program (a.out) - ./a.out
mv a.out helloworld
./helloworld
_______________________________________________________________________________________