JordansphereLinux
Zabbix Graphs Showing Incorrect Time
Problem: After a new installation of Zabbix (appliance) 3.4.6 the time on the graphs were 2 hours ahead. The clock on the server was correct. Solution Edit Zabbix configuration file vi /etc/apache2/conf-enabled/zabbix.conf It appeared the timezone in the Zabbix settings is set to Europe/Riga Change php_value date.timezone Europe/Riga to you actual timezone for […]
Install Zabbix Agent on CentOS
The following describes how to install Zabbix agent 3.4.6 onto CentOS 6.9 1) Add Zabbix Repository rpm -ivh http://repo.zabbix.com/zabbix/3.4/rhel/6/x86_64/zabbix-release-3.4-1.el6.noarch.rpm 2) Install Zabbix yum install -y zabbix-agent 3) . Edit zabbix_agentd.conf vi /etc/zabbix/zabbix_agentd.conf Server={Zabbix_Monitoring_server} Hostname={your_server_name} 4) Start Zabbix agent service service zabbix-agent start 5) Add Zabbix Agent service to start up scripts […]
Reset Lost Root Password – CentOS 7
Issue: I lost the password for my CentOS 7 virtual machine in my cloud VDC. Resolution: To reset the root password we will firstly need to boot into single user mode. Use the following steps: 1) Reboot the VM. During startup press "e" in grub menu 2. Find the line starting with linux16. […]
Install Open VM Tools on CentOS 6
Use the following commands to install Open VM Tools (open-vm-tools) in CentOS 6 1. install EPEL repository yum -y install epel-release 2. Install Open VM Tools yum -y install open-vm-tools 3. Start Open VM Tools service service vmtoolsd start
Transfer Spooling Area is not Writable in vCloud Director
Issue: During a new install of vCloud Director 8.20 on Centos 6.9 the service failed to start properly for the first time. Troubleshooting: I investigated log files # tail -f /opt/vmware/vcloud-director/logs/cell.log Output: Application Initialization: 'com.vmware.vcloud.common.core' 100% complete. Subsystem 'com.vmware.vcloud.ui-vcloud-webapp' started Application Initialization: 'com.vmware.vcloud.common.core' complete. Server is ready in 1:05 (minutes:seconds) Successfully handled all […]
Create NFS Share in CentOS
This document describes the process of creating an NFS share on a fresh install of CentOS 6. I will be sharing the directory /home/share for use in a test vCloud Director environnment. I will have two servers connecting to the NFS share (10.64.51.61 and 10.64.51.62) Firstly its always wise to run an update […]
Restart VCSA 6.5 Services via CLI Commands
First of all you will need to connect to the VSCA CLI by SSH. Then type shell on the command line: Command> shell To list all services and their state: # service-control –status –all Example output: To start a service: # service-control –start –{service-name} In this example I am starting the vpxd service […]
New Install of Squid Only Listening on IPv6
Problem: I installed Squid 3.5.20 on a fresh copy of CentOS 7 but the web proxy was not working when I pointed a browser to it. Troubleshooting: I could telnet locally to port 3128 but when I tried from another device on the network I was unable to connect, despite opening the port on […]
Disable Firewalld in CentOS 7
Simple instructions on how to stop, disable and the check the status of firewall 1) Stop the firewalld service # systemctl stop firewalld 2) Disable the firewalld service from starting # systemctl disable firewalld 3) Check the status of the firewalld service # systemctl status firewalld