| CREATE ROLE role_name | |
| GRANT privilege ON object_type object_name TO ROLE role_name [WITH GRANT OPTION] | |
| GRANT ROLE role_name TO GROUP group_name | |
| REVOKE privilege ON object_type object_name FROM [ROLE] role_name | |
| REVOKE ROLE role_name FROM GROUP group_name |
| aws comprehend detect-dominant-language --text "dank je" | |
| aws comprehend detect-dominant-language --text "நன்றி" | |
| aws comprehend detect-dominant-language --text "i am sankar" | |
| --------------------- | |
| aws comprehend detect-sentiment --language-code en --text "aws sucks!" |
| ############################ Topic related commands | |
| ## create a topic | |
| kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test | |
| ## topic info | |
| kafka-topics.sh --zookeeper localhost:2181 --describe --topic test |
| sudo sysctl -w net.ipv4.ip_forward=1 ## make it permanent. /etc/sysctl.conf | |
| sudo iptables -t nat -A PREROUTING -p tcp --dport 8001 -j DNAT --to-destination 172.20.19.192:10000 | |
| sudo iptables -t nat -A POSTROUTING -j MASQUERADE | |
| sudo service iptables save |
| activator --version | |
| ## use java template for generating java project layout | |
| activator new foo_java play-java | |
| ## use scala template for generating scala project layout | |
| activator new foo_scala play-scala | |
| ######### Run interactive commands ##################### |
The following commands will start a container with Kafka and Zookeeper running on mapped ports 2181 (Zookeeper) and 9092 (Kafka).
docker pull spotify/kafka
docker run -d -p 2181:2181 -p 9092:9092 --env ADVERTISED_HOST=kafka --env ADVERTISED_PORT=9092 --name kafka spotify/kafka
ADVERTISTED_HOST was set to kafka, which will allow other containers to be able to run Producers and Consumers.
| include Java | |
| import org.apache.hadoop.hbase.HBaseConfiguration | |
| import org.apache.hadoop.hbase.client.HBaseAdmin | |
| import org.apache.hadoop.hbase.client.HTable | |
| import org.apache.hadoop.hbase.util.Bytes | |
| conf = HBaseConfiguration.create() | |
| admin = HBaseAdmin.new(conf) | |
| tables = admin.listTables() |
| # installs to /opt/gradle | |
| # existing versions are not overwritten/deleted | |
| # seamless upgrades/downgrades | |
| # $GRADLE_HOME points to latest *installed* (not released) | |
| gradle_version=2.9 | |
| wget -N https://services.gradle.org/distributions/gradle-${gradle_version}-all.zip | |
| sudo unzip -foq gradle-${gradle_version}-all.zip -d /opt/gradle | |
| sudo ln -sfn gradle-${gradle_version} /opt/gradle/latest | |
| sudo printf "export GRADLE_HOME=/opt/gradle/latest\nexport PATH=\$PATH:\$GRADLE_HOME/bin" > /etc/profile.d/gradle.sh | |
| . /etc/profile.d/gradle.sh |
| #!/bin/bash | |
| IPT="/sbin/iptables" | |
| # Server IP | |
| SERVER_IP="$(ip addr show eth0 | grep 'inet ' | cut -f2 | awk '{ print $2}')" | |
| # Your DNS servers you use: cat /etc/resolv.conf | |
| DNS_SERVER="8.8.4.4 8.8.8.8" | |
| # Allow connections to this package servers |
| VMWare runs a dhcp server as a service in windows. | |
| To assign a static ip to a guest, | |
| Open -> C:\ProgramData\VMware\vmnetdhcp | |
| Add to it. CDH3 is the guest name in the VMWare player | |
| host CDH3 { |