ccityzh的博客

1、D指令后不会打印再打印pattern空间的内容eg: data文件内容This is header lineThis is first line.This is second line.一、指令：sed  'N;h;G;p;D' dataThis is header lineThis is first line.This is header lineThis is first line.Thi...

vi /etc/yum.repos.d/docker.repo[dockerrepo]name=Docker Repositorybaseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/enabled=1gpgcheck=1gpgkey=https://yum.dockerproject....