kunwei2005

因为我爷爷去世的比较早，父亲作为家里的长兄，很早就担负起了家庭的重担，在学习之余，父亲还去火车站做临时搬运工，扛大包，赚钱来补贴家用。我对父亲的工作内容并不太了解，但回想起来，印象中有几件事让我对父亲充满的敬佩。八十年代初，秦岭发生了特大洪水，我父亲一直坚守在抗洪抢险第一线，直到膝盖负伤才回来休息。八十年代末，父亲又为了援助建设突尼斯水电工程，外派出差两年之久，把中国的水利水电技术带到北非。父亲在退休前有段时间，经常上山下乡去指导农村的小水电建设，长期的山路颠簸也引发了他椎间盘突出的毛病。 父亲对家庭也倾注了很大的心血。我们的家庭是严父慈母类型。父亲的话不多，君子纳于言而敏于行，父亲以他的行动指导了我姐和我的人生准则，使我们终生受益。父母的爱是和风细雨的，从日常生活的一点一滴体现出来。在我们高中阶段，为了让我姐和我专心学习，每天中午父亲都要骑车赶回家给我们做午饭。有一次我在回家路上看到他急匆匆地骑车往家赶，他并没有看到我，但我到现在还记得那份感动。还有一段美好的记忆如此生动地刻在我的脑海里。那是一个风和日丽的初夏休息日，我父亲三十多岁，风华正茂，骑着他的自行车，前面带着我，后面坐着我姐，从清姜大坡飞一般地骑下来。

#get centos container git pull centos #start centos with port mapping docker run -d -p 8088:8088 -p 9870:9870 --name "centos" -i centos #access centos docker exec -it centos /bin/bash #download the instructions wget https://www.clustermonkey.net/download/LiveLessons/Hadoop_Fundamentals/Hadoop_Spark_Fundamentals_Code_Notes-V3.0.tgz cd /tmp tar xzvf Hadoop_Spark_Fundamentals_Code_Notes-V3.0.tgz #follow the instructions in /tmp/Hadoop_Spark_Fundamentals_Code_Notes-V3.0/Lesson-2/Lesson-2.2/NOTES.txt to setup hadoop, pig, hive a few catches * adjust the JAVA_HOME and HADOOP_HOME accordingly based on your installation * modify HADOOP_PATH in the script hadoop-setup-script.sh under /tmp/Hadoop_Spark_Fundamentals_Code_Notes-V3.0/Lesson-2/Lesson-2.2/scripts * check if logs under /opt/hadoop-3.2.0/ is created * after hadoop 3.0.0, the namenode port is 9870 instead of 50070 * before running yarn, set the YARN_CONF_LIB export YARN_CONF_LIB=/opt/hadoop-3.2.0/etc/hado

REP: Reuse/Release Equivalence Principle, the granule of reuse is the granule of release CCP: Common Closure Principle CRP: Common Reuse Principle, don't force to depend on things they don't need ADP: Acyclic Dependencies Principle, no cycles in the dependency graph SDP: Stable Dependencies Principle, depend in the direction of stability SAP: Stable Abstractions Principle, as abstract as stable

SRP: Single Responsibility Principle, a module should be responsible to one and only one actor OCP: Open-Closed Principle, a software artifact should be open for extension but closed for modification LSP: Liskov Substitution Principle, interchangeable parts adhere to a contract ISP: Interface Segregation Principle, avoid depending on things not use DIP: Dependency Inversion Principle, details should depend on policies

openssl rsa -in id_rsa -outform pem > id_rsa.pem openssl rsa -in id_rsa -pubout -out id_rsa.pub.pem openssl dgst -sha256 -sign ~/.ssh/id_rsa.pem -out signature.data message openssl dgst -sha256 -verify ~/.ssh/id_rsa.pub.pem -signature signature.data  message

download/install geth from  https://github.com/ethereum/go-ethereum/wiki/Installation-instructions-for-Windows setup private net jason file under ~/.privether, an example of privategenesis.json {   "nonce": "0x00006d6f7264656e",   "difficulty": "0x000002",   "mixhash": "0x00000000000000000000000000000000000000647572616c65787365646c6578",   "coinbase": "0x0000000000000000000000000000000000000000",   "timestamp": "0x00",   "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",   "extraData": "0x",   "gasLimit": "0x2FEFD8",   "config": {         "chainId": 15,         "homesteadBlock": 0,         "eip155Block": 0,         "eip158Block": 0   },   "alloc": {     "cd2a3d9f938e13cd947ec05abc7fe734df8dd826": { "b

first install and start docker sudo yum -y install docker docker-registry [osboxes@osboxes ~]$ sudo systemctl enable docker.service [osboxes@osboxes ~]$ sudo systemctl start docker.service [osboxes@osboxes ~]$ sudo systemctl status docker.service install based on  https://dcos.io/docs/1.8/administration/installing/custom/gui/ if you meet permission issue, you need disable selinux [osboxes@osboxes ~]$ cat /etc/sysconfig/selinux # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: #     enforcing - SELinux security policy is enforced. #     permissive - SELinux prints warnings instead of enforcing. #     disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three two values: #     targeted - Targeted processes are protected, #     minimum - Modification of targeted policy. Only selected processes are protected. #     mls - Multi Level Security protection. SELIN