jasonrudolph

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

jestan

#### Create a feature branch
git checkout -b <branch-name>


#### Create a remote branch for the feature branch
git push origin refs/heads/<branch-name>


#### Delete a remote branch
git push origin :refs/heads/<branch-name>

jestan

#wrapper.java.additional.1=-Xdebug
#wrapper.java.additional.2=-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005

#wrapper.java.additional.1=-XX:+UseConcMarkSweepGC
#wrapper.java.additional.2=-Xloggc:logs/gclog
#wrapper.java.additional.3=-XX:MaxDirectMemorySize=256M
#wrapper.java.additional.4=-XX:NewRatio=1

jestan

#monitor the hard disk utilization  
iostat -xm 1

#monitor the cpu usage
sar -P ALL 1

#show disk usage
df -h

viktorklang

/*
Copyright 2012-2021 Viktor Klang

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software

jestan

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

santisaez

STUN implementations

• stund
• Content: server daemon and test client for STUN, RFC-3489 only
• URL does not load, the project seems abandoned
• The code is also available on SourceForge, last update was on January 2012
• TCP and TLS modes not supported
• The server needs two IPs, it’s mandatory and can not be configured
• C++, no extra libraries required, Windows port available
• Version = 0.97 (0.96 package available on Debian, 5 years without updates)

alphazo

libnfc supports UUID writable cards and even has some dedicated tools for them.

However it doesn't work with some of the cards found on eBay that are even simpler to use. Sector 0 is unlocked and can be written without any additional commands. libnfc requires a small patch to get it working.

Following has been tested under ArchLinux with modified libnfc 1.5.1, mfoc 0.10.2 and a SCL3711 dongle.

Patch & recompile libnfc

The patch is fairly simple, open libnfc-1.5.1/utils/nfc-mfclassic.c and comment 2 lines (it was lines 384 and 385 for me):

// Try to write the trailer

obscurerichard

slow

This bash script offers quick shortcuts to simulate slower network connections. It is useful when you need to simulate a wireless network on a Linux network server, especially when you are using a virtual machine guest on your local machine or in the cloud.

slow 3G                   # Slow network on default eth0 down to 3G wireless speeds
slow reset                # Reset connection for default eth0 to normal
slow vsat --latency=500ms # Simulate satellite internet  with a high latency
slow dsl -b 1mbps         # Simulate DSL with a slower speed than the default

slow modem-56k -d eth0 # Simulate a 56k modem on the eth1 device. eth0 is unchanged.