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Author Archives: bisser.todorov

MS SQL system database MSDB log file is huge

Posted on 20/03/2014 by bisser.todorov — No Comments ↓

The server is SQL 2005 sp2, and it’s acting as a main server for one application. Everything is working fine, and the onliest problem I have is that MSDBLog file is growing. The MSDB dB is currently about 100M and Continue reading MS SQL system database MSDB log file is huge→

Posted in Uncategorized | Leave a reply

ARP Timeout Value for Cisco 3750, Linux and Windows

Posted on 30/09/2013 by bisser.todorov — 1 Comment ↓

The ARP timeouts are vendor dependent and can very drastically from one vendor to another. Here is some information about ARP timeouts. Cisco 3750 switch # show interfaces vlan 1 Vlan1 is up, line protocol is down Hardware is EtherSVI, Continue reading ARP Timeout Value for Cisco 3750, Linux and Windows→

Posted in Uncategorized | 1 Reply

VMware time update problem

Posted on 25/09/2013 by bisser.todorov — No Comments ↓

In addition, VMware Tools automatically updates the guest’s time to match the host operating system’s time in a few other cases where the guest can be expected to have lost a large amount of time (even if periodic time synchronization Continue reading VMware time update problem→

Posted in CentOS, FreeBSD | Leave a reply

MySQL HA Cluster – DRBD and Heartbeat

Posted on 12/07/2013 by bisser.todorov — 1 Comment ↓

In the following article I have summarized some steps and hints to set-up a MySQL active/passive fail-over Cluster also sometimes called MySQL HA. With such a set-up you can achieve a 99.99% (4×9) HA set-up for MySQL (52 minutes downtime Continue reading MySQL HA Cluster – DRBD and Heartbeat→

Posted in CentOS | 1 Reply

Running Remote X Applications

Posted on 19/04/2013 by bisser.todorov — No Comments ↓

This HowTo will demonstrate how you can run a program on one computer but have it display on another. For this example we’ll assume you have a server with an IP address of “192.168.0.1″ and a desktop computer with an Continue reading Running Remote X Applications→

Posted in CentOS, FreeBSD | Leave a reply

Using LVM Snapshots – CentOS Short How To

Posted on 19/04/2013 by bisser.todorov — No Comments ↓

This tutorial will take you through creating an LVM snapshot. Suppose you have a NAS serving files for a company that operates 24 hours per day. There is no time you can stop the servers to run backups. Using LVM Continue reading Using LVM Snapshots – CentOS Short How To→

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Bounding network cards

Posted on 15/04/2013 by bisser.todorov — No Comments ↓

Linux allows administrators to bind multiple network interfaces together into a single channel using the bonding kernel module and a special network interface called a channel bonding interface. Channel bonding enables two or more network interfaces to act as one, simultaneously increasing the Continue reading Bounding network cards→

Posted in CentOS | Leave a reply

Converting old Emails from mail box to mail dir format

Posted on 14/04/2013 by bisser.todorov — No Comments ↓

So, we had an old server with mail boxes on it, and we decide to migrate to a newer version and set up an virtual mail server for all our domains (we will see how in another post). Main difference Continue reading Converting old Emails from mail box to mail dir format→

Posted in CentOS | Leave a reply

Extract active Users from Microsoft AD group using LDAP

Posted on 26/03/2013 by bisser.todorov — No Comments ↓

For one my project needed a script that retrieves a list of active users who are members of a specific group in Windows 2008 Active Directory using LDAP. So we have a FreeBSD or Linux box and Windows Active Directory Continue reading Extract active Users from Microsoft AD group using LDAP→

Posted in CentOS, FreeBSD | Leave a reply

LVM – short HowTo

Posted on 13/03/2013 by bisser.todorov — No Comments ↓

Overview First LVM Resize Logical Volume Add and remove HDD Return to original state RAID1 with LVM Repalcing Hard Drive Links Basically LVM looks like this: You have one or more physical volumes (/dev/sdb1 – /dev/sde1 in our example), and Continue reading LVM – short HowTo→

Posted in CentOS | Leave a reply

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