Linux

13th April 2017
How to update rsync to the latest version 3.1.1-1

How to update rsync to the latest version 3.1.1-1

I had the task of migrating 63TB of data from an old backup server to a new array. The standard versions of Rsync that comes with Centos 6 and 7 do not support “Total Progress” Feature: rsync -a --info=progress2 SOURCE DESTINATION Here is how I updated rsync... read the rest »
18th February 2016
DNS glibc vulnerability – Is your server secure?

DNS glibc vulnerability – Is your server secure?

A vulnerability within the glibc DNS client used by many recent Linux distributions has recently been identified. This vulnerability has the potential to allow malicious access to affected devices and software, allowing a third-party to cause a crash or run malicious code... read the rest »
9th February 2016
Extracting a database from a large mysqldump file

Extracting a database from a large mysqldump file

Restoring a single database from a large mysql dump is pretty easy, using the mysql command line client’s –one-database option: mysql -u root -p --one-database db_to_restore < fulldump.sql But what if you don’t want to restore the database, you just want to extract it out of the dump file? Well, that happens to be easy as […]... read the rest »
29th December 2015
LVM pvscan, vgscan and lvscan taking too long to run

LVM pvscan, vgscan and lvscan taking too long to run

Just before Christmas, we encountered monitoring issues with two host nodes (Debian) within our virtual cluster. Although all guest virtual machines were running perfectly fine – the nodes had stopped reporting virtual machine usage to our billing platform... read the rest »