Change the smtp address of a Microsoft 365 Group

In order to create a remote powershell session to 365, open Windows Powershell and run below commands:

$UserCredential = Get-Credential

and enter your 365 credentials when prompted.
Then type:

$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $UserCredential -Authentication Basic -AllowRedirection
Import-PSSession $Session -DisableNameChecking

To add required smtp address:

Set-UnifiedGroup -Identity "Group Name" -EmailAddresses: @{Add ="[email protected]"}

To promote as a primary smtp address:

Set-UnifiedGroup -Identity "Group Name" -PrimarySmtpAddress "[email protected]"

To remove the old address from the group:

Set-UnifiedGroup -Identity "Group Name" -EmailAddresses: @{Remove="[email protected]"

To end your Exchange Online Powershell session:

Remove-PSSession $Session
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Freenas issue when replacing failed disk

When replacing a failed hard disk from the GUI you get the following error:
“Unable to GPT format the disk ada…”.
From the command line:
sysctl kern.geom.debugflags=0x10

dd if=/dev/zero of=/dev/ada3 bs=512 count=1

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Install Zabbix on Centos 7

Zabbix requires Apache-Mysql-PHP stack to be installed in order to run. You can follow this previous post.
Let’s download and install Zabbix

rpm -ivh
yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent

We have to edit timezone in /etc/httpd/conf.d/zabbix

php_value date.timezone Europe/Athens
service httpd restart

Create a database or Zabbix

mysql -u root -p
create database zabbix character set utf8;
grant all privileges on zabbix.* to 'zabbix'@'localhost' identified by 'password';
flush privileges;
mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.4.3/create/schema.sql
mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.4.3/create/images.sql
mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.4.3/create/data.sql

Edit /etc/zabbix/zabbix_server.conf to set up zabbix database credentials
Start the zabbix-server process

service zabbix-server start
systemctl enable zabbix-server.service

Finally add the necessary firewall rules for snmp and zabbix agent

firewall-cmd --permanent --add-port=161/udp
firewall-cmd --permanent --add-port=10051/tcp
firewall-cmd --reload

Windows agent
Download from:
Unpack and copy to C:\
edit conf/ and add serverip under ‘Passive’ mode
Rename file to zabbix_agentd.conf
Run from command propmt in C:\install_dir –> zabbix_agentd.exe –install

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Install LAMP and WordPress on Centos 7

Install Mysql (MariaDB) and set password

yum -y install mariadb-server mariadb
systemctl start mariadb.service
systemctl enable mariadb.service

Install Apache

yum -y install httpd
systemctl start httpd.service
systemctl enable httpd.service

Open ports in firewall

firewall-cmd --permanent --zone=public --add-service=http 
firewall-cmd --permanent --zone=public --add-service=https
firewall-cmd --reload

Install PHP

yum -y install php
systemctl restart httpd.service
yum -y install php-mysql
yum -y install php-gd php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-snmp php-soap curl curl-devel
systemctl restart httpd.service

Now we are ready to install WordPress. Let’s create a database and a user for wordpress to work with.

mysql -u root -p
CREATE USER [email protected] IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON wordpress.* TO [email protected] IDENTIFIED BY 'password';

Now let’s download and install WordPress

tar xzvf latest.tar.gz
rsync -avP ~/wordpress/ /var/www/html/
mkdir /var/www/html/wp-content/uploads
chown -R apache:apache /var/www/html/*

Next we will configure WordPress

cd /var/www/html
cp wp-config-sample.php wp-config.php

Now we need to modify the following parameters that hold our database information in “wp-config.php” file

vim wp-config.php
// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', 'wordpress');

/** MySQL database username */
define('DB_USER', 'wordpressuser');

/** MySQL database password */
define('DB_PASSWORD', 'password');

Now we can complete the WordPress installation through the web interface. In your web browser, navigate to your server’s domain name or public IP address and fill the required information.

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