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There are many tools, including free ones that allow for video conversion, however, many of them use GUIs and don't allow for automation of tasks. FFmpeg is a command line based tools which allows to do very neat video manipulations.
We would like to share this small script, which our IT specialists have used for one of our video conversion projects. It parses a directory, finds all flv (Flash video) files and converts them to mp4. This script can be added to a cronjob to run on a scheduled basis. Converted videos can be moved elsewhere upon completion.
As mentioned, we've used ffmpeg to accomplish this task, running under Ubuntu 14.04. FFmpeg doesn't come with Ubuntu 14.04 and a package repository needs to be added manually first.
If you are unlucky enough to have a software raid running on your Linux server, you've probably noticed the occasional slowing down of the system. This is because of periodic redundancy checks of MD devices.
It is a cronjob that runs weekly and scans the MD devices for consistency. This can have a serious effect on the system, especially if you are running IO intensive virtual machines. (Such as Microsoft Exchange or SQL).
One way to solve this problem is to lower the dev.raid.speed_limit_max. By default, it is set to this:
If you are trying to run an RDS server in a workgroup, you will most likely run into this error:
"Remote Desktop Services will stop working in 120 days if this computer does not contact at least a valid Windows Server 2012 license server. On the RD connection Broker server, use Server Manager to verify or configure licensing settings."
"Remote Desktop Services will stop working because this computer is past grace period and has not contacted at least a valid Windows Server 2012 license server. Click this message to open RD Session Host Server Configuration to use Licensing Diagnosis"
or variations of above.
Sometimes we have emails going to a particular address, which cannot be stopped. There are many reasons, but most common is an invalid address, which pollutes the mail queue with invalid entries. The simplest way to solve this is by adding a DISCARD directive for postfix.
If you don't have it already, add this line in main.cf
header_checks = regexp:/etc/postfix/header_checks
One of our IT Support clients asked us why some emails are coming in with extra HTML content. After some searching, we've discovered that is was due to the MailScanner antispam system: it was parsing emails improperly and adding extra junk. We have decided to solve this by skipping the email from that domain from being scanned altogether.
One way to do so is to change the Scan Messages directive in MailScanner.conf from:
Scan Messages = yes
Scan Messages = %rules-dir%/scan.messages.rules
Then, in your rules directory, create a file called scan.messages.rules. In that file, be sure to add the line for scanning all by default: