官网下载：https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/

[root@localhost ~]# yum install -y wget net-tools
[root@localhost ~]# wget -c https://www.openssl.org/source/openssl-3.1.4.tar.gz --no-check-certificate
[root@localhost ~]# wget -c https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-9.5p1.tar.gz

# 安装cmd.pm模块，不然编译的时候会引发【Can‘t locate IPC/Cmd.pm in @INC】错误。
[root@localhost ~]# yum install -y perl-CPAN perl-IPC-Cmd gcc gcc-c++

[root@localhost ~]# tar zxvf openssl-3.1.4.tar.gz
[root@localhost ~]# tar zxvf openssh-9.5p1.tar.gz

# 安装openssl 3.1.4版本
[root@localhost ~]# cd openssl-3.1.4
[root@localhost openssl-3.1.4]# ./config --prefix=/usr/local/openssl
[root@localhost openssl-3.1.4]# make
[root@localhost openssl-3.1.4]# make install

[root@localhost openssl-3.1.4]# /usr/local/openssl/bin/openssl version
/usr/local/openssl/bin/openssl: error while loading shared libraries: libssl.so.3: cannot open shared object file: No such file or directory
[root@localhost openssl-3.1.4]# ldd /usr/local/openssl/bin/openssl
	linux-vdso.so.1 =>  (0x00007fff9b5ad000)
	libssl.so.3 => not found
	libcrypto.so.3 => not found
	libdl.so.2 => /lib64/libdl.so.2 (0x00007f0cfe5c4000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f0cfe3a8000)
	libc.so.6 => /lib64/libc.so.6 (0x00007f0cfdfda000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f0cfe7c8000)

# 可以看到2个库文件未找到
	libssl.so.3 => not found
	libcrypto.so.3 => not found
	
# 创建软连接，可以find搜索下然后创建软连接
[root@localhost openssl-3.1.4]# ln -s /usr/local/openssl/lib64/libssl.so.3 /usr/lib64/libssl.so.3
[root@localhost openssl-3.1.4]# ln -s /usr/local/openssl/lib64/libcrypto.so.3 /usr/lib64/libcrypto.so.3

[root@localhost openssl-3.1.4]# /usr/local/openssl/bin/openssl version
OpenSSL 3.1.4 24 Oct 2023 (Library: OpenSSL 3.1.4 24 Oct 2023)


# 安装openssh9.5
[root@localhost openssl-3.1.4]# yum install pam-devel libselinux-devel zlib-devel -y 
[root@localhost openssl-3.1.4]# rpm -e --nodeps $(rpm -qa | grep openssh)
[root@localhost openssl-3.1.4]# rm -f /etc/ssh/*
[root@localhost openssl-3.1.4]# cd ../openssh-9.5p1
[root@localhost openssh-9.5p1]# ./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-pam --with-zlib --with-tcp-wrappers --with-ssl-dir=/usr/local/openssl --without-hardening
[root@localhost openssh-9.5p1]# make && make install
[root@localhost openssh-9.5p1]# cp contrib/redhat/sshd.init /etc/init.d/sshd
[root@localhost openssh-9.5p1]# cp contrib/redhat/sshd.pam /etc/pam.d/sshd

[root@localhost openssh-9.5p1]# echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config
[root@localhost openssh-9.5p1]# echo "PermitRootLogin yes" >> /etc/ssh/sshd_config

# 修改日志到/var/log/secure
[root@localhost openssh-9.5p1]# sed -i 's/#SyslogFacility AUTH/SyslogFacility AUTHPRIV/g' /etc/ssh/sshd_config

# 服务管理
[root@localhost openssh-9.5p1]# cat /usr/lib/systemd/system/sshd.service 
[Unit]
Description=OpenSSH server daemon
After=network.target

[Service]
Type=simple
ExecStart=/usr/sbin/sshd -D $OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

[root@localhost openssh-9.5p1]# systemctl daemon-reload
[root@localhost openssh-9.5p1]# systemctl start sshd
[root@localhost openssh-9.5p1]# systemctl enable sshd


# 升级openssh后调不到/usr/local/bin 下的命令
[root@localhost ~]# vi .bash_profile 
PATH=$PATH:$HOME/bin:/usr/local/bin
[root@localhost ~]# source .bash_profile