Uncategorized

Installing/Updating Python

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brew upgrade && brew update
brew install pyenv
pyenv install 3.8.5
pyenv global 3.8.5

Add this to your ~/.zshrc file

if command -v pyenv 1>/dev/null 2>&1; then
  eval "$(pyenv init -)"
fi

source ~/.zshrc

Check your install

# Python 3.8.5
python -V

# .../.pyenv/shims/python
which python

docker-credential-pass Ubuntu setup for Bamboo CI/CD

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Ubuntu: 18.04
Docker: 18.09.5
docker-credential-pass: 0.6.2
pass: 1.7.1
gpg2: 2.2.4

Since my setup is for CI/CD I have a bamboo user to deploy my docker containers to Docker Hub and deploy to my production servers. Your use case may vary, but if you want your credentials to persist longer than a couple of hours before your system starts asking you to re-enter your passphrase this might work for you.

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# First install apps we'll need
sudo apt upgrade && apt install pass gnupg2 tmux
 
# Download docker-credential-pass
wget https://github.com/docker/docker-credential-helpers/releases/download/v0.6.2/docker-credential-pass-v0.6.2-amd64.tar.gz
 
# Unpack
tar xvf docker-credential-pass-v0.6.2-amd64.tar.gz
 
# Move into /usr/bin
sudo mv docker-credential-pass /usr/bin
 
# Check to see if it's working should return {}
docker-credential-pass list
 
# Here is where my setup will diverge
# I login to my bamboo user
su - [username]
 
# I run tmux
tmux
 
vi ~/.gnupg/gpg-agent.conf
 

My gpg-agent.conf file looks like this:

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default-cache-ttl 315569520
max-cache-ttl 315569520
 
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# Restart gpg-agent
echo RELOADAGENT | gpg-connect-agent
 
# Generate key
gpg2 --full-generate-key
 
# You'll get an output with a key, copy it to use
pass init DXXXXXXXXXXXXXX6E1AFXXXXXXXXXXB9XXXX497
 
# Enter a password
pass insert docker-credential-helpers/docker-pass-initialized-check
 
# You should get a return of {} instead of 'pass store is uninitialized'
docker-credential-pass list
 
# login to docker
docker login
 
# Check to see if it is stored
docker-credential-pass list
 
# should return something like
{"https://index.docker.io/v1/":"[username]"}
 

This worked for me. Also note the default-cache-ttl value is in seconds, the values I used is 10 years in seconds.

Getting SimpleCov-summary (0.0.5) to work with SimpleCov (0.16.1) and Rails 5.2

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Reading Time: < 1 minuteIf you run into issues with installing simplecov-summary using:

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# Put this in for RSpec, Minitest will plug in automatically
  RSpec.configure do |config|
    config.after(:suite) do
      if SimpleCov.running
        silence_stream(STDOUT) do
          SimpleCov::Formatter::HTMLFormatter.new.format(SimpleCov.result)
        end
 
        SimpleCov::Formatter::SummaryFormatter.new.format(SimpleCov.result)
      end
    end
  end
 

Here’s how to fix it:

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# Put this in for RSpec, Minitest will plug in automatically
  RSpec.configure do |config|
    config.after(:suite) do
      SimpleCov.at_exit do
        SimpleCov::Formatter::SummaryFormatter.new.format(SimpleCov.result)
        SimpleCov::Formatter::HTMLFormatter.new.format(SimpleCov.result)
      end
    end
  end
 

Since Rails 5 removed silence_stream because it is not thread-safe. I found implementations of silence_stream but I got it to work by just removing it completely and I prefer to see these outputs at the end of my test run.

ADD NEW USER CENTOS, ADD TO SUDOER, ADD RSA KEYS

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#as root
sudo su -
 
adduser username
 
visudo
# search for root
/root
# esc keypress n
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
username ALL=(ALL) NOPASSWD:ALL
 
# OR
visudo username ALL=(ALL) NOPASSWD:ALL
 
#exit
 
# su – to setup right user environment
su – username
 
ssh-keygen -t rsa -b 4096
# enter enter enter
 
cd ~/.ssh
touch authorized_keys
chmod 0700 authorized_keys
vi authorized_keys
 
# get the pub keys from your development computer
# less ~/.ssh/id_rsa.pub
# paste into authorized_keys
 
# from your dev computer
# ssh username@url
 

 

Rsync Remote

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rsync -a –progress -e ssh root@url:~/filename.sh .
 
rsync -a database.yml -e ssh qrsmart_user@url:~/
 

 

POSTGRESQL

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# shows system tables
postgres=# dS
 
# list databases
postgres=# l
 
# list tables
postgres=# d
 
# list users
postgres=# SELECT * FROM pg_user;
 

 

PALINDROME

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Ruby:

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class String
  def palindrome?
    self.downcase == self.downcase.reverse
  end
end
p "Bob".palindrome?
p "andy".palindrome?
 

Python:

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class myString(str):
def __init__ (self, value):
self.value = value
def is_palindrome(self):
return self.lower() == self[::-1].lower()
bob = myString("Bob")
andy = myString("andy")
print bob.is_palindrome()
print andy.is_palindrome()
 

 

Installing Merb on OSX 10.5

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sudo gem update --system
sudo gem install merb --include-dependencies
sudo gem install json
sudo gem install datamapper
sudo gem install ruby2ruby --include-dependencies
sudo gem install merb_datamapper
 

also had to do this for my system

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sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
sudo gem install do_mysql -- --with-mysql-config=/usr/local/mysq/bin/mysql_config