Category: CentOS

How to enable PolicyD on Zimbra server

Lets take a look at how to activate policyd 1. Enable policy su – zimbra zmprov ms `zmhostname` +zimbraServiceInstalled cbpolicyd +zimbraServiceEnabled cbpolicyd 2. Activate web interface Activate Policyd WebUI ( must run as root ) cd /opt/zimbra/data/httpd/htdocs/ ln -s /opt/zimbra/common/share/webui/ . 3. Edit configuration file edit /opt/zimbra/common/share/webui/includes/config.php #$DB_DSN=”sqlite:////tmp/cluebringer.sqlite”; #$DB_DSN=”mysql:host=localhost;dbname=cluebringer”; $DB_DSN=”sqlite:/opt/zimbra/data/cbpolicyd/db/cbpolicyd.sqlitedb”; $DB_USER=”root”; 4. Setup .htaccess file

CentOS 7 Deploy samba share with AD integration

We will use SAMBA and WINBIND to setup shares and to join Microsoft domain Install all necessary packages using yum manager. yum -y install samba-winbind samba-winbind-clients pam_krb5 krb5-workstation mdadm samba samba-client realmd Join your windows domain. In our case the name of the domain is lab.local realm join --user=administrator --client-software=winbind lab.local Start winbind service and

Linux system monitoring and statistics gathering

We will look at some Linux commands which will help us monitor system performance, gather statistics and view historical resource usage. Monitoring connections with ss command ss should be preinstalled for most modern Linux distributions Show established TCP connection ss -t Show established UDP connections ss -u Show ports listening for TCP connections ss -ltn

Install SoftEther server on Linux CentOS 7.2

We will take a look at hot to install SoftEther VPN on CentOS 7 and connect to it from Windows system running VPN manager. 1. We install CentOS 7 minimal with firewalld and selinux disabled. Make sure gcc is installed with all updates yum update -y yum install gcc 2. Download softether-vpnserver* package for Linux

How to install zabbix monitoring tool on CentOS7

This is very quick how to on installing zabbix on CentOS 7. Install LAMP ' yum -y install httpd systemctl start httpd systemctl enable httpd yum -y install epel-release rpm -Uvh yum -y install mod_php72w php72w-cli php72w-common php72w-devel php72w-pear php72w-gd php72w-mbstring php72w-mysql php72w-xml php72w-bcmath yum -y install mariadb-server systemctl start mariadb systemctl enable mariadb

Integrate FreeIPA with Windows 2016 Active Directory

In this LAB we will setup Trust based integration between FreeIPA and Windows 2016 Active Directory Forest Lab Information Windows 2016 Standard CentOS 7.5.1804 FreeIPA 4.5.4 Windows domain-win.poc.lab IPA domain-lin.poc.lab Kerberos realm names = WIN.POC.LAB ; LIN.POC.LAB Required Firewall ports TCP ports: 80, 88, 443, 389, 636, 88, 464, 53, 135, 138, 139, 445, 1024-1300

Authenticate CentOS7 to Active Directory

Here we look at the steps we need to take to authenticate CentOS7 to Active Directory 1. Install the following packages yum install sssd realmd oddjob oddjob-mkhomedir adcli samba-common samba-common-tools krb5-workstation openldap-clients policycoreutils-python -y 2. Verify correct SRV records dig -t SRV 3. Join your windows domain with account that has permissions to join

Linux CenstOS 7 and Windows 2012 R2 Authentication integration

This article will show how to integrate Windows 2012 R2 Domain with CentOS 7 or RedHat 7. After completing this steps user will be able to login to Linux system with windows AS credentials. Installing Identity Management for UNIX on Windows 2012 R2 DC by using a command line Run powershell as administrator and execute

Using screen command to share session on Linux system

Lets take a look at how to share existing ssh session using command called screen. It is very useful in case where you have to show your users something remotely. First install screen program – We assume CentOS7 yum install screen System1 You can create multiple screen sessions or share existing on Create multiple screen

Changing name of salt minion CentsOS 7

We run into situation when we needed to change name of already added salt minion. Here is few simple steps that will get this done. On Salt minion Stop the Salt-Minion Service systemctl stop salt-minion Delete the current keys cd /etc/salt/pki/minion/ rm -rf minion.pem Change the minions id in /etc/salt/minion_id vim /etc/salt/minion_id On