1.sudo yum provides /usr/bin/ab
Loading mirror speeds from cached hostfile * base: mirror.fileplanet.com * elrepo: ftp.yz.yamagata-u.ac.jp * epel: dl.fedoraproject.org * extras: mirror.fileplanet.com * updates: mirror.fileplanet.com httpd-tools-2.4.6-67.el7.centos.x86_64 : Tools for use with the Apache HTTP Server 源 ：base 匹配来源： 文件名 ：/usr/bin/ab
2.使用 httpd-tools-2.4.6-67.el7.centos.x86_64 这个包名
执行
sudo yum install -y httpd-tools-2.4.6-67.el7.centos.x86_64
