CentOS6-Nagios6

Update oVirt hosted-engine host certificates VM if the are expired

Environment: Red Hat Virtualization 4.4 Issue:  All the hosted-engine hosts vdsm certificates are expired. The hosted-engine VM is down and it’s unable to start it using hosted-engine –vm-start because of expired certificates. Resolution: Since CA of the RHV environment is the RHV manager which is down, we have to get the CA certificates and keys to the host […]

Send E-Mail On Redhat / CentOS with SMTP (SMTP Relay)

In this tutorial we will send email with mailx and using external SMTP server for email sending from CentOS/Redhat Install mailx yum -y update yum install -y mailx We can now start sending e-mails using create a symbolic link ln -s /bin/mailx /bin/email Set an External SMTP Server to Relay E-Mails vi /etc/mail.rc edit set […]

Delete Files Older Than X Days

Command Syntax find /path/to/files* -mtime +5 -exec rm {} \; Note that there are spaces between rm, {}, and \; This is a very simple tutorial how to find and delete files older than X days. I needed this for a project where i collected some images and after a while they took too much […]