sudo vim /etc/yum.repos.d/cassandra.repo
[cassandra]
name=Apache Cassandra
baseurl=https://www.apache.org/dist/cassandra/redhat/311x/
I assume you already have Docker up and running on your Raspberry Pi 2. If not, see this article.
The next natural step is to install Docker Compose (formerly Fig), but there's no ARM support out of the box. This recipe will help you install Docker Compose on your Raspberry Pi 2!
The following six steps will do the trick:
this is how i got my raspberry pi 2 set up to be available for backup via TimeMachine | |
install netatalk 3 | |
--make the OSX recognize non AFP volumes on macbook | |
sudo defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1 |
Reference: RFC 2616 - HTTP Status Code Definitions
Disable vim automatic visual mode on mouse select | |
issue: :set mouse-=a | |
add to ~/.vimrc: set mouse-=a | |
my ~/.vimrc for preserving global defaults and only changing one option: | |
source $VIMRUNTIME/defaults.vim | |
set mouse-=a |
#!/usr/bin/env ruby | |
# List all keys stored in memcache. | |
# Credit to Graham King at http://www.darkcoding.net/software/memcached-list-all-keys/ for the original article on how to get the data from memcache in the first place. | |
require 'net/telnet' | |
headings = %w(id expires bytes cache_key) | |
rows = [] |
Ever wanted to delete all your likes/favorites from Twitter but only found broken/expensive tools? You are in the right place.
setInterval(() => {
for (const d of document.querySelectorAll('div[data-testid="unlike"]')) {
d.click()
}
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 |