Category: CentOS

  • Install memcached on CentOS 7

    To install memcached on CentOS 7, run

    yum -y install memcached

    Set memcached to start on boot

    systemctl enable memcached

    Start memcached with

    systemctl start memcached

    Installing PHP Module

    You need remi repository installed, which provide a memcached module for all versions of php they support.

    For PHP 5.6, run

    yum install php-memcache

    Now phpinfo() will show

    centos 7 php memcache

    See memcached

  • Adding IP Range in CentOS 6

    To add an IP range in CentOS 6 server, create file

    vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0

    Add

    IPADDR_START=67.198.150.171
IPADDR_END=67.198.150.174
CLONENUM_START=0

    Replace IP with your actual start and end IP.

    Restart network service with

    service network restart
  • Install MySQL 8 on CentOS, RHEL 6/7

    Install MySQL 8 on CentOS, RHEL 6/7

    To Add MySQL yum repository to your server, go to

    https://dev.mysql.com/downloads/repo/yum/

    Download the rpm file available.

    For RHEL/CentOS 7

    wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
rpm -ivh mysql80-community-release-el7-3.noarch.rpm

    For RHEL/CentOS 6

    wget https://dev.mysql.com/get/mysql80-community-release-el6-1.noarch.rpm
rpm -ivh mysql80-community-release-el6-1.noarch.rpm

    Installing MySQL Server

    yum install mysql-community-server

    Stop/Start MySQL

    To stop/start MySQL, use service name “mysqld”.

    systemctl start mysqld
systemctl stop mysqld
systemctl restart mysqld

    MySQL 8 root Password

    When MySQL first starts, it create a random password and store in MySQL log file. To find the MySQL root password, run

    grep 'temporary password' /var/log/mysqld.log

    This default password don’t allow you to do anything, so login to MySQL with this password and set a secure password for root.

    ALTER USER 'root'@'localhost' IDENTIFIED  BY 'MYSQL_ROOT_PASSOWRD';

    MYSQL_ROOT_PASSOWRD – replace it with you secure new MySQL root password.

    Installing Older Version of MySQL

    When you add MySQL repository, it activate latest version by default. If you want older version, say 5.7, you need to activate it.

    To see available repository, run

    yum repolist all | grep mysql

    To disable MySQL 8 repository, run

    yum-config-manager --disable mysql80-community

    To enable MySQL 5.7 repository, run

    yum-config-manager --enable mysql57-community

    Now installing MySQL server will install MySQL 5.7 instead of latest version.

    MySQL CentOS

  • chkconfig

    chkconfig is a command available in CentOS 6 to set a service start on boot.

    To start lighttpd on boot run.

    chkconfig --levels 235 lighttpd on

    chkconfig command list all services and its run levels.

    [root@server12 ~]# chkconfig
acpid          	0:off	1:off	2:on	3:on	4:on	5:on	6:off
atd            	0:off	1:off	2:off	3:on	4:on	5:on	6:off
auditd         	0:off	1:off	2:on	3:on	4:on	5:on	6:off
blk-availability	0:off	1:on	2:on	3:on	4:on	5:on	6:off
cgconfig       	0:off	1:off	2:on	3:on	4:on	5:on	6:off
cgred          	0:off	1:off	2:off	3:off	4:off	5:off	6:off
crond          	0:off	1:off	2:on	3:on	4:on	5:on	6:off
csf            	0:off	1:off	2:on	3:on	4:on	5:on	6:off
dnsmasq        	0:off	1:off	2:off	3:off	4:off	5:off	6:off
docker         	0:off	1:off	2:on	3:on	4:on	5:on	6:off
ebtables       	0:off	1:off	2:off	3:off	4:off	5:off	6:off
exim           	0:off	1:off	2:on	3:on	4:on	5:on	6:off
haldaemon      	0:off	1:off	2:off	3:on	4:on	5:on	6:off
htcacheclean   	0:off	1:off	2:off	3:off	4:off	5:off	6:off
httpd          	0:off	1:off	2:on	3:on	4:on	5:on	6:off
ip6tables      	0:off	1:off	2:on	3:on	4:on	5:on	6:off
iptables       	0:off	1:off	2:off	3:off	4:off	5:off	6:off
iscsi          	0:off	1:off	2:off	3:on	4:on	5:on	6:off
iscsid         	0:off	1:off	2:off	3:on	4:on	5:on	6:off
lfd            	0:off	1:off	2:on	3:on	4:on	5:on	6:off
lvm2-monitor   	0:off	1:on	2:on	3:on	4:on	5:on	6:off
lxc            	0:off	1:off	2:off	3:off	4:off	5:off	6:off
mdmonitor      	0:off	1:off	2:on	3:on	4:on	5:on	6:off
messagebus     	0:off	1:off	2:on	3:on	4:on	5:on	6:off
mysqld         	0:off	1:off	2:on	3:on	4:on	5:on	6:off
netcf-transaction	0:off	1:off	2:on	3:on	4:on	5:on	6:off
netconsole     	0:off	1:off	2:off	3:off	4:off	5:off	6:off
netfs          	0:off	1:off	2:off	3:on	4:on	5:on	6:off
network        	0:off	1:off	2:on	3:on	4:on	5:on	6:off
newrelic-sysmond	0:off	1:off	2:on	3:on	4:on	5:on	6:off
nginx          	0:off	1:off	2:on	3:on	4:on	5:on	6:off
ntpd           	0:off	1:off	2:off	3:off	4:off	5:off	6:off
ntpdate        	0:off	1:off	2:off	3:off	4:off	5:off	6:off
numad          	0:off	1:off	2:off	3:off	4:off	5:off	6:off
pure-ftpd      	0:off	1:off	2:on	3:on	4:on	5:on	6:off
radvd          	0:off	1:off	2:off	3:off	4:off	5:off	6:off
rdisc          	0:off	1:off	2:off	3:off	4:off	5:off	6:off
redmine        	0:off	1:off	2:on	3:on	4:on	5:on	6:off
restorecond    	0:off	1:off	2:off	3:off	4:off	5:off	6:off
rsyslog        	0:off	1:off	2:on	3:on	4:on	5:on	6:off
saslauthd      	0:off	1:off	2:off	3:off	4:off	5:off	6:off
smartd         	0:off	1:off	2:off	3:off	4:off	5:off	6:off
sshd           	0:off	1:off	2:on	3:on	4:on	5:on	6:off
svnserve       	0:off	1:off	2:off	3:off	4:off	5:off	6:off
sysstat        	0:off	1:on	2:on	3:on	4:on	5:on	6:off
udev-post      	0:off	1:on	2:on	3:on	4:on	5:on	6:off
vnstat         	0:off	1:off	2:on	3:on	4:on	5:on	6:off
yum-cron       	0:off	1:off	2:on	3:on	4:on	5:on	6:off
[root@server12 ~]#

  • Install FFmpeg on CentOS using yum

    Install epel repository using

    yum install epel-release -y

    Method 1

    Install rpmfusion for your distro

    https://rpmfusion.org/Configuration

    For CentOS 8

    rpm -ivh https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm

    For CentOS 7

    rpm -ivh https://download1.rpmfusion.org/free/el/rpmfusion-free-release-7.noarch.rpm

    Install ffmpeg with

    yum install ffmpeg

    2023-02-20 On CentOS 7, repo provided ffmpeg version 3.4.12. scrpms repo had a newer version.

    Method 2

    Install scrpms repo

    On CentOS 7

    wget http://scrpms.net/pub/RPMS/el7/x86_64/scrpms-repo-22-3.el7.x86_64.rpm
rpm -ivh scrpms-repo-22-3.el7.x86_64.rpm

    Install ffmpeg with

    yum install ffmpeg ffmpeg-devel

    NOTE:

    2019-12-11 i tested it on CentOS 7. ffmpeg worked. Version is 4.2.1. mplayer/mencoder install failed with dependency error.

    2023-02-20 CentOS 7 ffmpeg version 5.1.2

    Method 3

    http://li.nux.ro/repos.html

    On CentOS 7

    rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

    Install ffmpeg with

    yum install ffmpeg ffmpeg-devel

    NOTE: On 2019-12-11 i tested it on CentOS 7. ffmpeg and mencoder install worked. But version is very old. ffmpeg version 2.8.15. MPlayer SVN-r37391-4.8.3

    See ffmpeg

  • Install PHP 7.2 in CentOS ISPConfig Server

    First you need to install EPEL repo and REMI repo.

    To install EPEL, run

    yum install epel-release

    To Install REMI repo, download RPM file for your OS from https://rpms.remirepo.net

    For CentOS 6, run

    rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-6.rpm

    For CentOS 7

    rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-7.rpm

    Install PHP 7.2 with

    yum install php72-php-bcmath php72-php-cli php72-php-common php72-php-fpm php72-php-gd php72-php-intl php72-php-json php72-php-mbstring php72-php-mcrypt php72-php-mysqlnd php72-php-opcache php72-php-pdo php72-php-pear php72-php-pecl-uploadprogress php72-php-pecl-zip php72-php-soap php72-php-xml php72-php-xmlrpc

    Configure PHP-FPM

    vi /etc/opt/remi/php72/php-fpm.d/www.conf

    Find

    listen = 127.0.0.1:9000

    Replace 9000 with unused port, i used

    listen = 127.0.0.1:9072

    Restart/Enable PHP-FPM

    For CentOS 7

    systemctl start php72-php-fpm
systemctl enable php72-php-fpm

    For CentOS 6

    service php72-php-fpm start
chkconfig php72-php-fpm on

    Add PHP Version in ISPConfig

    Login to ISPConfig, go to

    System > Additional PHP Versions > Add new PHP version

    ISPConfig Add New PHP Version

    On Next Page, enter name.

    Name: PHP7.2

    In “FastCGI Settings” tab, fill following details

    Path to the PHP FastCGI binary = /opt/remi/php72/root/usr/bin/php-cgi
Path to the php.ini directory = /etc/opt/remi/php72

    In “PHP-FPM Settings” tab, add

    Path to the PHP-FPM init script =  /etc/init.d/php72-php-fpm
Path to the php.ini directory = /etc/opt/remi/php72
Path to the PHP-FPM pool directory = /etc/opt/remi/php72/php-fpm.d

    Changing a Sites PHP Version in ISPConfig

    Go to sites, click on site you need to change PHP version.

    On this page, you need to select value for “PHP” and “PHP Version”. Once changed, you need to wait a minute for the version change to happen. This is done by cronjob, that run every one minute.

    * * * * * /usr/local/ispconfig/server/server.sh &> /dev/null

    You can manually execute the script if you want.

    ispconfig

  • CentOS 7

    Reset root password

    Install Software on CentOS 7

    Web Server

    MySQL

    Back to CentOS

  • Install ionCube Loader on CentOS 7

    Go to

    https://www.ioncube.com/loaders.php

    Download latest version of ionCube Loader

    cd /usr/local/src
wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz
tar xvf ioncube_loaders_lin_x86-64.tar.gz
cd ioncube

    Find out PHP version you are using with command

    php -v

    ioncube php version

    Here we have PHP version 5.6, now you need to find the available loaders for PHP 5.6 with command

    ls -l | grep 5.6

    The one we needed is ioncube_loader_lin_5.6.so

    You need to copy it to PHP extension_dir directory.

    To find location of extension_dir, run

    php -i | grep extension_dir

    For default php installation, it will be /usr/lib64/php/modules

    So copy it the loader with command

    cp ioncube_loader_lin_5.6.so /usr/lib64/php/modules

    Edit php.ini

    vi /etc/php.ini

    Add

    zend_extension = ioncube_loader_lin_5.6.so

    At this point, php -m will show ionCube loader.

    ioncube php module

    Now restart web server with

    service httpd restart

    ioncube

  • CentOS 6

    Back to CentOS

  • Install PHP 7 on CentOS 6

    Install EPEP repo with command

    yum install -y epel-release

    Next you need REMI repo, you can get it form

    https://rpms.remirepo.net/

    Install it with

    rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-6.rpm

    You can search for PHP versions with command

    yum search php

    Select PHP version

    First install yum-utils

    yum install yum-utils

    Now you can select required PHP version with command

    yum-config-manager --enable remi-php72

    Use remi-php70 for PHP 7.0, remi-php71 for PHP 7.1

    Install PHP

    To install PHP 7.2, run

    yum install php72 -y

    PHP binary will be installed as php72, you can create a synlink if you need.

    ln -s /usr/bin/php72 /usr/bin/php

    Enable PHP in Apache

    yum install php72-php

    Now restart apache

    service httpd restart

    php
    CentOS 6

  • Install GeoIP Apache Module in CentOS

    To install GeoIP Apache module on CentOS 7, run

    yum -y install GeoIP GeoIP-devel GeoIP-data
yum -y install mod_geoip

    Now you need to configure Apache VirtualHost.

    To block traffic, add following to your VirtualHost entry

    RewriteEngine On
RewriteCond %{ENV:GEOIP_COUNTRY_CODE} ^(CN|RU|A1)$
RewriteRule ^(.*)$ https://serverok.in [L]

    In this example, traffic from CN, RU and A1 (stands for proxy IP) get redirected to specified URL.

    geoip

  • Install fail2ban on CentOS

    To install fail2ban on CentOS, first, enable the epel repo by running

    yum install epel-release -y

    Now install fail2ban with

    yum install fail2ban -y

    Enable fail2ban with

    systemctl enable fail2ban

    Basck to fail2ban