Requirement:
CentOS 6
OpenSSL 1.0.1e
Because I do not want to upgrade openssl ,so I just use openssl1.0.1e to install openssh7.4p1.
Upgrade:
1、wget https://cloudflare.cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.4p1.tar.gz
2、./update_openssh_7.4p1