假如我们在centos7上安装nginx时，会附带的安装一个openssl-devel的包，但是我们安装的时候会出现以下报错：可能是因为openssl-devel的版本太低。

Error: Package: 1:openssl-devel-1.0.1e-60.el7.x86_64 (base)
           Requires: openssl-libs(x86-64) = 1:1.0.1e-60.el7
           Installed: 1:openssl-libs-1.0.2k-21.el7_9.x86_64 (@updates)
               openssl-libs(x86-64) = 1:1.0.2k-21.el7_9
           Available: 1:openssl-libs-1.0.1e-60.el7.x86_64 (base)
               openssl-libs(x86-64) = 1:1.0.1e-60.el7
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

 解决方法：

1.如果虚拟机联网，直接安装

[root@proxy-master ~]# wget ftp://ftp.pbone.net/mirror/ftp.centos.org/7.9.2009/updates/x86_64/Packages/openssl-devel-1.0.2k-21.el7_9.x86_64.rpm

2.如果虚拟机没有联网，我们可以在迅雷里面下载然后传入虚拟机

http://rpm.pbone.net/resultsb_dist_94_size_1581144_name_openssl-devel-1.0.2k-21.el7_9.x86_64.rpm.html

然后安装

[root@rs1 ~]# rpm -ivh openssl-devel-1.0.2k-21.el7_9.x86_64.rpm

如果提示以下报错

[root@rs1 ~]# rpm -ivh openssl-devel-1.0.2k-21.el7_9.x86_64.rpm 
error: Failed dependencies:
    krb5-devel(x86-64) is needed by openssl-devel-1:1.0.2k-21.el7_9.x86_64
    zlib-devel(x86-64) is needed by openssl-devel-1:1.0.2k-21.el7_9.x86_64

说明没有下面的两个包， 直接安装下面的两个包，

[root@rs1 ~]# yum -y install krb5-devel zlib-devel

然后更新一样openssl-devel包

[root@rs1 ~]# rpm -ivh openssl-devel-1.0.2k-21.el7_9.x86_64.rpm --force

然后再次尝试安装一开始安装失败的软件包，发现成功。