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Bash

A collection of 6 posts

Simple traffic control tester (traffic mangling)

Simple traffic control tester (traffic mangling)

This post covers how to make a nice simple (cheap!) but still powerful traffic ‘mangler’ :) It can quite granularly control the bandwidth, latency, loss and error injection levels without having to re-plumb or reconfigure the network you are trying to test. To do this we’ll use two nice features

Batch re-encode videos based on resolution, filetype and codec

Batch re-encode videos based on resolution, filetype and codec

Its been quite handy recently to re-encode some old videos to x265/HEVC to save a bit (actually a fair bit :o) of disk space now that most devices at home can playback x265 videos in hardware. The main downside is its realtivly slow and finding the videos I wanted

Check service is running with systemctl and start it if stopped + mail

Check service is running with systemctl and start it if stopped + mail

I did an earlier version of this script on Fedora 16 but used pidof rather than systemctl to check a services status. I use this script below on a few fedora 17 boxes and it seems to be working very nicely :) Any suggestions or feedback is as always much appreciated.

Automatically create symbolic link to Bluray when inserted

Automatically create symbolic link to Bluray when inserted

My MythTV 0.25 box does support Bluray playback straight from the disc but as Blurays need to be mounted in Linux it needs to know where the disc is mounted. At the moment I couldn't get MythTV to automatically detect this location so I hacked a script together. I

Grab multiple OIDs via SNMPwalk

Grab multiple OIDs via SNMPwalk

SNMPWALK is a great too for grabbing SNMP oject identifier values (OIDs). To see how to install it see this post here. Mostly I use it for checking various single OID values but sometimes is can be useful to grab more than one value. SNMPwalk itself doesn't allow for you

Re-encode all videos in a directory using mencoder

Re-encode all videos in a directory using mencoder

I had ~50 videos in a directory that were encoded using on2 VP7 which was causing some problems on some of my home media players. Heres a quick one line command that will re-encode all files suffixed with .avi to use xvid :) Once the script has completed all the re-encodes