1.现在最新包：https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.9p1.tar.gz
2.备份文件：cp -rf /etc/ssh /etc/ssh_bk
3.记录原来pid
[root@localhost ssh_bk]# ps -aux|grep ssh Warning: bad syntax, perhaps a bogus ‘-‘? See /usr/share/doc/procps-3.2.8/FAQ root 2407 0.0 0.0 66240 1240 ? Ss Jan04 0:00 /usr/sbin/sshd root 22018 0.0 0.0 113724 6116 ? Ss Jan07 0:01 sshd: root@notty root 22112 0.0 0.0 57436 2388 ? Ss Jan07 0:00 /usr/libexec/openssh/sftp-server root 56258 0.0 0.0 103332 856 pts/1 S+ 11:26 0:00 grep ssh root 72854 0.0 0.0 113156 5708 ? Ss Jan07 0:00 sshd: root@pts/1
4.重启 service sshd restart
原文：https://www.cnblogs.com/lurenjia1994/p/10238165.html