VMware : Basic ESXi commands

You will find below some basic and useful commands to operate a ESXi hypervisor from the command line. Put the host in maintenance mode (or leave maintenance mode) :

List all VMs registered on the host :

Verify the power state of a specific VM :

Power on a specific VM :… Read More »

Web : Updating ownCloud to version 8.1.9 was unsuccessful

Using ownCloud repo and encountered the following error while upgrading to version 8.1.9? Updating ownCloud to version 8.1.9, this may take a while. Set log level to debug – current level: “Warning” Turned on maintenance mode Checked database schema update Checked database schema update for apps Updated database Exception: App can’t be installed because it… Read More »

Category: Web

VMware : vCenter version and build number history

Here is a list below of version and build number for VMware vCenter Server product. I have no credit over it, it has been taken from virten.net Web site. Name Version Release Build Installer Version vCenter Server 6.0.0 Update 2 6.0 U2 2016-03-15 3634793 3634788 VMware vCenter Server 6.0 Update 1b 6.0 U1b 2016-01-7 3339083 3343019… Read More »

Windows : How to change the Exchange MailStore database path

By default, Microsoft Exchange Server will place the MailStore database in the installation folder as followed : C:\Program Files\Micros oft\Exchange Server\V15\Mailbox\Mailbox Database 0000000000\Mailbox Database 0000000000.edb It may be suitable for small scale setup, however you may want to change it to a different path for various reasons when come to medium or large scale setup…… Read More »

Linux : How to enable NTP loopfilter statistics on RHEL/CentOS?

You may end up at some point where you need detailed statistics about time synchronization on your Linux machine. To achieve that, simply do the following : 1. Edit your NTP configuration file :

2. Append the following parameters :

3. Restart the NTP daemon :

 

JunOS : Packet loss (ICMP drop) observed with rapid pings

You probably noticed that rapid pings toward a JunOS device result in a loss of packet as the example shown below. In our case we are issuing the ping from a Cisco router : Sending 100, 500-byte ICMP Echos to 10.204.100.1, timeout is 2 seconds: Packet sent with a source address of 10.204.100.1 .!!!!!!!!!.!!!!!!!!!.!!!!!!!!!.!!!!!!!!!.!!!!!!!!!.!!!!!!!!!.!!!!!!!!! .!!!!!!!!!.!!!!!!!!!.!!!!!!!!!… Read More »

Windows : NTFS Warning The system failed to flush data to the transaction log. Corruption may occur.

Having repeated NTFS warning entries in EventViewer as the one below? Log Name: System Source: Ntfs Event ID: 57 Task Category: (2) Level: Warning Description: The system failed to flush data to the transaction log. Corruption may occur. This indicate an issue with the filesystem recovery mechanism and the filesystem might not be fault tolerant… Read More »