Wednesday, February 22, 2023

Solved : Unable to guess the MIME type as no guessers are available (have you enabled the php_fileinfo extension?).

Issues: 
1. Image doesn't load correctly or shows broken
2. File (i.e: csv, xlsx etc.) will not be downloaded or cannot be exported

Solution:
in WHM:
  1. Navigate to Software -> EasyApache4
  2. Click the button that says Customize next to Currently Installed Packages
  3. Click PHP Extensions
  4. Search for Fileinfo in the search bar and select the extensions you would like to install
  5. Click Review
  6. After looking over the proposed changes, scroll to the bottom of the screen and click provision.




In cPanel using PHP Selector (if not works even installed in WHM):




In cPanel using ini file (if not works even installed in WHM):




Other:
  1. Install PHP FIleInfo Extension (if not installed)
  2. Enable php_fileinfo in php.ini 
extension=php_fileinfo.dll (Windows)
extension=php_fileinfo.so (Linux)

Monday, February 20, 2023

How to Install Nginx, MariaDB, PHP and Create Virtual Server Block with Nginx on AlmaLinux 8

yum install nginx -y
systemctl start nginx
systemctl enable nginx
systemctl status nginx
nginx -v


firewall-cmd --permanent --zone=public --add-service=http 
firewall-cmd --permanent --zone=public --add-service=https
firewall-cmd --reload
chown nginx:nginx /usr/share/nginx/html -R

################ MariaDB ##############################

yum install mariadb-server mariadb -y
systemctl start mariadb
systemctl enable mariadb
systemctl status mariadb
mysql_secure_installation
mysql -e "SHOW DATABASES;" -p

################ PHP installation ##########################

yum install php php-mysqlnd php-fpm php-opcache php-gd php-xml php-mbstring php-json -y

################### For Specific PHP Version #################
sudo dnf config-manager --set-enabled crb
sudo dnf install epel-release -y
sudo dnf install http://rpms.remirepo.net/enterprise/remi-release-9.rpm
sudo dnf update -y
sudo dnf module list php
sudo dnf -y install yum-utils
sudo dnf module enable php:remi-8.2 -y
########################################################
systemctl start php-fpm

systemctl enable php-fpm

systemctl status php-fpm

vi /etc/php-fpm.d/www.conf

user = nginx
group = nginx

systemctl reload php-fpm

echo "<?php phpinfo() ?>" > /usr/share/nginx/html/info.php

systemctl restart nginx php-fpm
########################################################
            Host File
=====================================================
sudo vi /etc/hosts
IP_ADDRESS mt.baycombd.com
chown nginx:nginx /var/www/example.com/public_html -R
echo "<?php phpinfo() ?>" > /var/www/example.com/public_html/info.php
======================================================
         Custom  Public_html Directory
=====================================================
sudo mkdir -p /var/www/example.com/public_html
sudo chown -R nginx:nginx /var/www/example.com/public_html
sudo chmod -R +x /var/www
sudo chcon -t httpd_sys_content_t /var/www/example.com -R
sudo chcon -t httpd_sys_rw_content_t /var/www/example.com -R
=====================================================
             Create Custom Server Block 
=====================================================
touch /etc/nginx/conf.d/example.com.conf
# Web root location & port listining
server 
{
        listen 80;
        root /var/www/example.com/public_html;
        index index.php index.html index.htm;
        server_name example.com www.example.com;
        access_log /var/www/example.com/access.log;
        error_log /var/www/example.com/error.log;

# Redirect server error pages to the static page
        location / 
{
try_files $uri $uri/ /index.php;
        }
        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;
        location = /50x.html 
{
        root /var/www/example.com/public_html;
        }
# Pass the PHP scripts to FastCGI server
location ~ \.php$ 
{
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        try_files $uri =404;
       # fastcgi_pass 127.0.0.1:9000;
fastcgi_pass unix:/var/run/php-fpm/www.sock;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_index index.php;
        include fastcgi_params;
        }
}      
======================================================
systemctl restart nginx php-fpm
nginx -t

Sunday, February 19, 2023

503 Service Unavailable : PHP-FPM issue

Error: 503 Service Unavailable The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Solution: 

systemctl start php80-php-fpm (if face the error follow the next command )

systemctl status php80-php-fpm.service

ERROR: unable to bind listening socket for address '127.0.0.1:9000': Address already in use (98)

netstat -tulpn | grep -w 9000 

tcp        0      0 127.0.0.1:9000          0.0.0.0:*               LISTEN      884/php-fpm: master 

kill 884

systemctl start php80-php-fpm


Note: Use your PHP version, PID and Port in the command. if netstat not works install net-tools first: yum install net-tools

How to Install PHP 8.0/8.1on Linux Centos 7

Method-1 for PHP 8.0

Remi Repository
# yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
# yum install https://rpms.remirepo.net/enterprise/remi-release-7.rpm

PHP 8.0 install
# yum install -y --enablerepo=remi-php80 php php-cli

Exntesions:
#yum install -y --enablerepo=remi-php80 php-mysqlnd

Method-1 for PHP 8.1

yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum -y install https://rpms.remirepo.net/enterprise/remi-release-7.rpm
yum -y install yum-utils
yum-config-manager --disable 'remi-php*'
yum-config-manager --enable remi-php81
yum repolist
yum -y install php php-{cli,fpm,mysqlnd,zip,devel,gd,mbstring,curl,xml,pear,bcmath,json,opcache,redis,memcache}

Thursday, February 16, 2023

How to test PowerMTA SMTP using telnet

telnet localhost 25

ehlo localhost

mail from: username@from-domain.tld

rcpt to: username@to-domain.tld

data

Subject: PMTA SMTP Check

This is just an SMTP conf Check. You may disregard.

.

quit


tail -f /var/log/pmta/pmta.log

pmta show queues

How to Send an email using Telnet in CentOS

sudo apt install telnet

sudo yum install telnet


telnet targetserver.tld 25


HELO sourceserver.tld 

MAIL FROM: username@sourcedomain.tld

RCPT TO: username@example.com

DATA 
Subject: Sending an email using  SMTP through telnet 
Hi, 
This is just a Test Email ? You may disregard this? 

regards;
Mr. Y

.

Note: We can start writing some subject and body. To do that we need to use the DATA command. First type DATA followed by Subject: and the body. Once done, enter " . "  (without quote)to send the email to be queued.

Wednesday, February 15, 2023

Stop and Disable Firewalld on CentOS 7

sudo firewall-cmd --state

sudo systemctl stop firewalld

sudo systemctl disable firewalld

sudo systemctl mask --now firewalld

Monday, February 13, 2023

Create and Install Self-Signed SSL Certificate on CentOS

yum install openssl

mkdir /etc/[webserver]/ssl

openssl genrsa -out “/etc/[webserver]/ssl/example.key” 2048

openssl req -new -key “/etc/[webserver]/ssl/example.key” \ -out “/etc/[webserver]/ssl/example.csr”


Country Name (2 letter code) [AU]:xx

State or Province Name (full name) [Some-State]:xx xx

Locality Name (eg, city) []:xx

Organization Name (eg, company) [Internet Widgits Pty Ltd]:xx

Organizational Unit Name (eg, section) []:xx

Common Name (e.g. server FQDN or YOUR name) []:example.com

Email Address []:xxx@gmail.com

openssl x509 -req -days 365 -in “/etc/[webserver]/ssl/example.csr” \ -signkey “/etc/[webserver]/ssl/example.key” \ -out “/etc/[webserver]/ssl/example.crt”


Saturday, February 11, 2023

Add Domain specific DKIM in PMTA config

#MTAs

<virtual-mta ip1>

    smtp-source-host 192.198.0.1 host.domain.tld

    <domain *>

        max-msg-rate 400/h

    </domain>

</virtual-mta>

#DKIM Keys

domain-key key1,domain1.tld,/etc/pmta/keys/key1.domain.tld

domain-key key2,domain2.tld,/etc/pmta/keys/key2.domain.tld

domain-key key3,domain3.tld,/etc/pmta/keys/key3.domain.tld

#Specify the DKIM for specific Domain using Directive

<domain domain1.tld>

    dkim-sign yes

    smtp-hosts [127.0.0.1]:587

    dkim-identity @domain1.tld

</domain>

<domain domain2.tld>

    dkim-sign yes

    smtp-hosts [127.0.0.1]:587

    dkim-identity @domain2.tld

</domain>

<domain domain3.tld>

    dkim-sign yes

    smtp-hosts [127.0.0.1]:587

    dkim-identity @domain3.tld

</domain>

#CALL PMTA POOL for Rotation

<virtual-mta-pool pmta-pool>

    virtual-mta ip1

</virtual-mta-pool>


Extract the First Word Using Text Formulas

 =IFERROR(LEFT(A2,FIND(" ",A2)-1),A2)



How to merge a branch to main branch in Github.

In Terminal or Command Prompt:  git checkout main  [switch to main branch] git pull origin main  [grab latest updates from main branch] git ...