Monday, June 29, 2020
Friday, June 26, 2020
How To Start, Stop, And Restart , Reload, Nginx Web Server
Video Tutorial -https://youtu.be/xDGRw4TPPHI
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Nginx is a powerful server application that routes network traffic. It’s often used as a reverse proxy server, but can also be configured as a regular web server.
One of the most common operations you will encounter is starting, stopping, and restarting the Nginx web server.
In this tutorial, learn how to start, stop, and restart the Nginx service.
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Testing Environment:Ubuntu 20.04 LTS Hostname - www.yourdomain.com - ip Address - 192.168.1.20
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Check Nginx version# nginx -v
Start Nginx# systemctl start nginx Or service nginx start Or sudo /etc/init.d/nginx start
Stop Nginx# systemctl stop nginx Or service nginx stop Or sudo /etc/init.d/nginx stop
Restart Nginx# systemctl restart nginx Or service nginx restart Or sudo /etc/init.d/nginx restart
Reload Nginx# systemctl reload nginx Or service nginx reload Or sudo /etc/init.d/nginx reload
View server status# systemctl status nginx Or service nginx status Or sudo /etc/init.d/nginx status
Test Nginx Configuration# service nginx configtest Or ngixn -t
Show command help# systemctl -h nginx Or service nginx -?
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How To Start, Stop, And Restart ,Reload, Apache2 Web Server
Video Tutorial -https://youtu.be/_JWSpbOn5tI
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Apache HTTP server is the most popular web server in the world. It is a free, open-source, and cross-platform HTTP server providing powerful features that can be extended by a wide variety of modules.
If you are a developer or system administrator, chances are that you’re dealing with Apache regularly.
In this Tutorial, we will go over the most important and frequently used Apache commands, including starting, stopping, and restarting Apache
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Testing Environment:Ubuntu 20.04 LTS Hostname - www.yourdomain.com - ip Address - 192.168.1.20
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Check Apache version# apache2 -v
Start Apache# systemctl start apache2 Or service apache2 start Or sudo /etc/init.d/apache2 start
Stop Apache# systemctl stop apache2 Or service apache2 stop Or sudo /etc/init.d/apache2 stop
Restart Apache# systemctl restart apache2 Or service apache2 restart Or sudo /etc/init.d/apache2 restart
Reload Apache# systemctl reload apache2 Or service apache2 reload Or sudo /etc/init.d/apache2 reload
View server status# systemctl status apache2 Or service apache2 status Or sudo /etc/init.d/apache2 status
Enable Apache Service# systemctl enable apache2
Check Apache Configuration Syntax Errors# apachectl -t
Show command help# systemctl -h apache2 Or service apache2 -?
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Tuesday, June 23, 2020
How To install Zabbix Server Or Cacti On Ubuntu 20.04 LTS
Video Tutorial -https://youtu.be/JBJ66UucQCw
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Zabbix is an open source interesting and most popular monitoring package. Zabbix provide the monitoring service on servers, desktops, network based applications and applications etc. It uses Zabbix agent for getting information and collecting data on the devices installed with Zabbix. You can also monitor the SMTP, HTTP, SNMP, TCP, ICMP, SSH and telnet protocols or packets. You’ll be get notified by Zabbix to stay alert for real time with the help of XMPP.
Website - https://www.zabbix.com/
Github - https://github.com/zabbix/zabbix
Cacti is a free and open-source network monitoring and graphic tool written in PHP. It is designed as the front-end application for the Round-Robin database tool (RRDtool). It is used to get CPU load and network bandwidth utilization in a graph format.
Website - https://www.cacti.net/
Github - https://github.com/Cacti/cacti/
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Testing Environment: Ubuntu 20.04 LTS Hostname - www.example.com - ip Address - 192.168.1.40
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installing Zabbix -
apt update ; apt install -y build-essential net-tools curl git software-properties-common
wget https://repo.zabbix.com/zabbix/5.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_5.0-1+focal_all.deb
dpkg -i zabbix-release_5.0-1+focal_all.deb
apt update ; apt -y install zabbix-server-mysql zabbix-frontend-php zabbix-agent zabbix-apache-conf
nano /etc/zabbix/apache.conf
php_value date.timezone Asia/Kolkata
sed -i "s/;date.timezone.*/date.timezone = Asia\/\Kolkata/" /etc/php/*/apache2/php.ini
mysql -u root -p | Password - Blank
create database zabbix character set utf8 collate utf8_bin;
grant all privileges on zabbix.* to zabbixuser@localhost identified by 'password';
quit;
DBDetails - DBName: zabbix | DBUser: zabbixuser | DBPassword: password
cd /usr/share/doc/zabbix-server-mysql ; zcat create.sql.gz | mysql -u zabbixuser -p zabbix
nano /etc/zabbix/zabbix_server.conf
DBHost=localhost | DBName=zabbix | DBUser=zabbixuser | DBPassword=password
systemctl restart zabbix-server zabbix-agent apache2 ; systemctl enable zabbix-server zabbix-agent apache2
http://www.example.com/zabbix/ | Username: Admin | Password: zabbix
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installing Cacti
apt install -y apache2 php-mysql libapache2-mod-php php-xml php-ldap php-mbstring php-gd php-gmp mariadb-server mariadb-client snmp php-snmp rrdtool librrds-perl build-essential net-tools curl git software-properties-common
nano /etc/mysql/mariadb.conf.d/50-server.cnf
collation-server = utf8mb4_unicode_ci
max_heap_table_size = 128M
tmp_table_size = 128M
join_buffer_size = 256M
innodb_file_format = Barracuda
innodb_large_prefix = 1
innodb_buffer_pool_size = 2048M
innodb_flush_log_at_timeout = 3
innodb_read_io_threads = 32
innodb_write_io_threads = 16
innodb_io_capacity = 5000
innodb_io_capacity_max = 10000
innodb_buffer_pool_instances = 21
systemctl daemon-reload ; systemctl restart mariadb ; systemctl status mariadb
sed -i "s/;date.timezone.*/date.timezone = Asia\/\Kolkata/" /etc/php/*/apache2/php.ini
sed -i "s/;date.timezone.*/date.timezone = Asia\/\Kolkata/" /etc/php/*/cli/php.ini
sed -i "s/memory_limit = .*/memory_limit = 512M/" /etc/php/*/apache2/php.ini
sed -i "s/memory_limit = .*/memory_limit = 512M/" /etc/php/*/cli/php.ini
sed -i "s/max_execution_time =.*/max_execution_time = 60/" /etc/php/*/apache2/php.ini
sed -i "s/max_execution_time =.*/max_execution_time = 60/" /etc/php/*/cli/php.ini
mysql -u root -p [ Password - Blank Press Enter]
create database cacti;
ALTER DATABASE cacti CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'cactipassword';
flush privileges;
exit
mysql -u root -p mysql < /usr/share/mysql/mysql_test_data_timezone.sql [ Password - Blank Press Enter]
mysql -u root -p [ Password - Blank Press Enter]
GRANT SELECT ON mysql.time_zone_name TO cactiuser@localhost;
flush privileges;
exit
wget https://www.cacti.net/downloads/cacti-latest.tar.gz
tar -zxvf cacti-latest.tar.gz ; mv cacti-1* /opt/cacti
mysql -u root -p cacti < /opt/cacti/cacti.sql [ Password - Blank Press Enter]
nano /opt/cacti/include/config.php
nano /etc/cron.d/cacti
*/5 * * * * www-data php /opt/cacti/poller.php > /dev/null 2>&1
nano /etc/apache2/sites-available/cacti.conf
Alias /cacti /opt/cacti
<Directory /opt/cacti>
Options +FollowSymLinks
AllowOverride None
<IfVersion >= 2.3>
Require all granted
</IfVersion>
<IfVersion < 2.3>
Order Allow,Deny
Allow from all
</IfVersion>
AddType application/x-httpd-php .php
<IfModule mod_php.c>
php_flag magic_quotes_gpc Off
php_flag short_open_tag On
php_flag register_globals Off
php_flag register_argc_argv On
php_flag track_vars On
# this setting is necessary for some locales
php_value mbstring.func_overload 0
php_value include_path .
</IfModule>
DirectoryIndex index.php
</Directory>
apache2ctl configtest ; a2ensite cacti
systemctl restart apache2 ; systemctl status apache2
touch /opt/cacti/log/cacti.log ; chown -R www-data:www-data /opt/cacti/
http://www.example.com/cacti Username: admin | Password: admin NewPass -O8K["{7A;08^!)x
5 Min later Refresh Web Browser
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Tuesday, June 16, 2020
How to Install R Programming Language In Ubuntu 20.04 LTS
Video Tutorial -
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R is an open-source programming language that specializes in statistical computing and graphics.
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OS - Ubuntu 20.04 LTS
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apt update ; apt install -y build-essential net-tools curl git software-properties-common
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/'
apt update
apt install r-base -y
sudo -i R
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installing Go And write Hello World on Linux Mint 19.3 Tricia
Video Tutorial -
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Go is a compiled, statically typed programming language developed by Google. Many modern applications such as Docker, Kubernetes, and Caddy are written in Go.
Offcial Website -https://golang.org/
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Testing Environment Setup- : Linux Mint 19.3 Tricia ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------__________________________________________________________________________________________________________________
lsb_release -cd
apt update ; apt install -y build-essential net-tools curl git software-properties-common
wget -c https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz -O - | sudo tar -xz -C /usr/local
export PATH=$PATH:/usr/local/go/bin
source ~/.profile
go version
mkdir -p go/src/hello && cd go/src/hello
nano hello.go
package main
import "fmt"
func main() {
fmt.Printf("hello, world\n")
}
go build
./hello
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How To install Development Tools , Openssl , CMake On Ubuntu 20.04
Video Tutorial -https://youtu.be/TEYLrB3LaCw
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Development tools are required to install on your system if you have planned to build software. It’ s also useful for building packages on your system. Development tools contain few general useful tools like GCC, g++, make, libc6-dev and dpkg-dev packages.
CMake is a cross-platform, open-source build system. CMake is a family of tools designed to build, test and package software. - https://cmake.org/
OpenSSL is a full-featured software library that contains an open-source implementation of the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols, used for securing information transmitted over computer networks. - https://www.openssl.org/
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Testing Environment: Ubuntu 20.04 LTS 64Bit
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To install C, C++ Compiler -Development Tools - apt update ; apt-get install build-essential -y
Test C and C++ with a sample Program -
apt install ccache -y
nano sum.c
#include<stdio.h>
int main()
{
int a, b, c;
printf("Enter two numbers to add, separated by a space: ");
scanf("%d%d",&a,&b);
c = a + b;
printf("The sum of equals %d\n",c);
return 0;
}
gcc sum.c -o sum && ccache gcc sum.c -o sum && ./sum
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installing OpenSSL -
apt update ; apt install -y build-essential net-tools curl git software-properties-common libssl-dev checkinstall zlib1g-dev
openssl version -a
cd /usr/local/src/ ; wget https://www.openssl.org/source/openssl-3.0.0-alpha3.tar.gz
tar -xf openssl-3.0.0-alpha3.tar.gz ; cd openssl-3.0.0-alpha3/
./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl shared zlib
make && make test && make install
nano /etc/ld.so.conf.d/openssl-3.0.0.conf
/usr/local/ssl/lib
ldconfig -v
mv /usr/bin/c_rehash /usr/bin/c_rehash.BEKUP ; mv /usr/bin/openssl /usr/bin/openssl.BEKUP
nano /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/ssl/bin"
source /etc/environment
echo $PATH ; which openssl ; openssl version -a
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installing CMake -
apt update ; apt install -y build-essential net-tools curl git software-properties-common libssl-dev checkinstall zlib1g-dev
wget https://github.com/Kitware/CMake/releases/download/v3.18.0-rc1/cmake-3.18.0-rc1.tar.gz
tar -zxvf cmake-3.18.0-rc1.tar.gz
cd cmake-3.18.0-rc1/
./configure --help
./configure --prefix=/opt/cmake
make && make install
/opt/cmake/bin/cmake -version
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