How to remove all partitions / data on a disk
To remove / delete all data on your disk drive, you can use one of the following methods below. Have a look a gparted in case you need a live […]
Category: Linux
How to configure DKIM & SPF & DMARC on Sendmail for multiple domains on CentOS 7
DKIM DKIM is DomainKeys Identified Mail and is used in mail servers, such as Postfix or Sendmail to sign e-mails and thus authenticating the sender so that a forgery can […]
How to change default password of Brocade fibre channel SAN switches
Brocade fibre channel switches containing the Fabric OS (FOS) will be delivery with the preconfigured default accounts admin, root and user. It is important not to use default passwords in […]
How to install Icinga 2 and Icinga Web 2 on CentOS 7
Requirements Install a fresh CentOS 7 (1810) This tutorial requires SELinux to be disabled. In case you need to use SELinux, please read the appendix at the end of the […]
How to install/configure Samba basics on CentOS7
Install Samba # yum -y install samba* Enable Samba # systemctl start smb # systemctl enable smb Sample configuration The sample configuration below can be used to get access to […]
How to install Lucee 5.2 on CentOS 7 x64 with Apache/2.4.6
Lucee is a light-weight dynamic scripting language for the JVM that enables the rapid development of simple to highly sophisticated web applications. Lucee is made for the web; it simplifies […]
Why does Postfix deliver mails locally instead of relaying them?
We get the following error message if the OP5 host tries to deliver emails: Oct 23 02:23:44 thuop5 postfix/qmgr[2690]: 8F98A1020C3: from=<monitor@xyz.ch>, size=1041, nrcpt=1 (queue active)</monitor@xyz.ch> Oct 23 02:23:44 thuop5 postfix/pickup[5959]: […]
CentOS 7: yum update throws libgpod error
If you try to update your current centos-release-7-3.1611.el7.centos.x86_6 to CentOS 7.4 you’ll may see following error message in case you have libgpod installed from EPEL repo. –> Running transaction check […]
How to create a 1GB, 100MB, 10MB file for testing
On Linux dd is the command from Linux that i use. To create 1 GB file go with dd if=/dev/zero of=testfile bs=1024 count=1024000 to create 100 MB try dd if=/dev/zero […]
How to install SmokePing on CentOS 7
This tutorial explains how to install Tobias Oetiker’s Smokeping into /opt/smokeping on a CentOS 7 box. Features of Smokeping: – Best of breed latency visualisation. – Interactive graph explorer. – […]