CentOS7

virtualbox 扩容

//创建个100G的虚拟硬盘
"C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" createhd --filename 
Ubuntu.vdi --size 102400
//克隆已有虚拟硬盘
"C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" clonehd "H:\VirtualBox VMs\Ubuntu_14.04\Ubuntu_14.04.vdi" Ubuntu.vdi --existing
//有快照时有选则Snapshots\{xxxxx.vdi}，即选择当前使用的快照，一般是文件大小最大的那个。

docker下使用jenkins

docker run -d -p 8090:8080 -p 50000:50000 -v jenkins:/var/jenkins_home -v /etc/localtime:/etc/localtime --name jenkins daocloud.io/library/jenkins:1.579

git2u

https://ius.io/setup
https://serverfault.com/questions/709433/install-a-newer-version-of-git-on-centos-7