F5 iRule Class Match Crash

Problem: F5 iRules with “class match” crash sometimes with this message: /Common/UA_DETECT – ambiguous option “-“: must be -all, -index, -element, -name, or -value while executing “class match [string tolower [HTTP::header User-Agent]] contains UA_STRINGS” Discussion: the class match command has optional parameters, when the HTTP header User-Agent starts with a “-” it gets intepreted by

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Huawei Mate Book Pro X

I bought a new notebook, and installed a minimal Linux distribution on it. While setting everything up, I put together a collection of configuration files and scripts, and compiled them in this github repository: https://github.com/alexte/mate-book-pro-x-linux-config

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Juniper MX204 Upgrade

1. Check the current version: 2. go to https://support.juniper.net/support/downloads/ and select MX204, and search for newer version3. Select “Install Package” -> “VMHOST 64-BIT” -> “tgz”4. After login you will see a URL. Copy this URL5. Download the file onto your Juniper MX204, with this command 6. You may validate the image with: 7. Install the software

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Web Audio Silence

Problem: I had problems with an audio driver (no not on Linux). The sound started with a delay after every gap of silence. This bug cuts off about 1/2 of a second of the attack of the sound. This is a problem when you try to make music in particular. Workarround: I made a little webpage that

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Juniper MX204 Setup Guide

Juniper MX204 is router from Juniper running Junipers own operation system Junos. The MX204 has 4x 40Gb and 8x 10Gb. The 40Gb ports can be split into 4x 10Gb. After unboxing it has no configuration. Connect a standard RS232 console cable with a Cisco style RJ45 connector, set your terminal to 9600 8N1 and power

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Javascript Bugs ?

Javascript is a fun programming language, its non blocking, event-driven paradigm is really interesting for many cases. On the other hand there are strange things that are really making me nervous when using this language: : parseInt doing strange things: # nodejs > parseInt(0.000007, 10); 0 > parseInt(0.0000007, 10); 7 : numbers in JavaScript are

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