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Look for OpenJDK in APT sudo apt search openjdk Install OpenJDK 8 sudo apt-get install openjdk-8-jdk Add the proper GPG key for ElasticSearch wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add - Make sure to install/update transport sudo apt-get install apt-transport-https Save the repo definition echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.list Update APT and install ElasticSearch from APT sudo apt-get update && sudo apt-get install elasticsearch Reload the daemon sudo /bin/systemctl daemon-reload Allow ElasticSearch to start on boot sudo /bin/systemctl enable elasticsearch.service Lets fire up ElasticSearch... sudo systemctl start elasticsearch.service Lets see if we have some logs sudo ls -la /var/log/elasticsearch/ Have a look at the logs and make sure that ElasticSearch has properly initiated sudo cat /var/log/elasticsearch/elasticsearch.

1) Enable rabbitmq_management   sudo rabbitmq-plugins enable rabbitmq_management 2) Restart rabbitmq-server sudo service rabbitmq-server restart 3) Access GUI http://rabbitmq-server-ip:15672/ username:guest password:guest //you can check ip sudo service rabbitmq-server status command 4) Access  rabbitmqadmin Command Line http://rabbitmq-server-ip:15672/cli a) Download  rabbitmqadmin script wget http://rabbitmq-server-ip:15672/cli/rabbitmqadmin b) Change permission chmod +x rabbitmqadmin 5) rabbitmqadmin Commands a) Help ./rabbitmqadmin --help b)List all exchanges ./rabbitmqadmin -u guest -p cloud -H localhost list exchanges -u : username -p : password c) List all queues   ./rabbitmqadmin -u guest -p cloud -H localhost list queues d) Get help of subcommands ./rabbitmqadmin help subcommands ./rabbitmqadmin help subcommands | grep queue ./rabbitmqadmin help subcommands | grep exchnage ./rabbitmqadmin help subcommands | grep binding

Step 1 – Open the terminal step 2. Update APT Repository Cache   (1)check the version table on your operating system     The package you are searching for is named redis-server. You can check its package info with apt show redis-server sudo apt-cache policy redis-server or sudo apt show redis-server The dataset is stored entirely in memory and periodically flushed to disk. (2)add PPA repository to your OS: sudo add-apt-repository ppa:chris-lea/redis-server (3)In order to install Redis, you first need to update the APT repository cache of your Ubuntu. You can do that with the following command: Update the apt-get packages index files and also update existing packages to the newest versions by using the following commands: sudo apt-get update  sudo apt-get upgrade step 2. Install Redis on Ubuntu Using the APT Command sudo apt-get install redis-server step 3. Check Redis Version redis-cli --version step 4：check if the Redis is running. Once t

Try with this commands 1) Install rvm following instructions for Ubuntu on  https://github.com/rvm/ubuntu_rvm 2) rvm install ruby 2.2.10 3) rvm install ruby 2.2.10 --with-gcc=gcc if its not work then try with this  1. sudo apt purge libssl-dev && sudo apt install libssl1.0-dev 2. rvm install 2.3.5 --autolibs=disable

Set Default editor in ubuntu sudo update-alternatives --config editor Type 2 and hit enter nano will be set as default editor