在对我的 VPS（当前运行的是 CentOS 7.4.1708）进行了大量的忽视之后，我尝试运行yum update，但是在经过一长串“正在处理依赖关系...”行之后，输出的结尾如下所示：
...
---> Package nginx-mod-mail.x86_64 1:1.20.1-9.el7 will be an update
--> Processing Dependency: nginx(abi) = 1.20.1 for package: 1:nginx-mod-mail-1.20.1-9.el7.x86_64
---> Package nginx-mod-stream.x86_64 1:1.20.1-9.el7 will be an update
--> Processing Dependency: nginx(abi) = 1.20.1 for package: 1:nginx-mod-stream-1.20.1-9.el7.x86_64
--> Finished Dependency Resolution
Error: Package: libzip5-1.8.0-2.el7.remi.x86_64 (remi)
Requires: libzstd(x86-64) >= 1.3.6
Installing: libzstd-1.3.4-1.el7.x86_64 (MariaDB)
libzstd(x86-64) = 1.3.4-1.el7
Error: Package: 1:nginx-1.10.2-1.el7.x86_64 (@epel)
Requires: nginx-all-modules = 1:1.10.2-1.el7
Removing: 1:nginx-all-modules-1.10.2-1.el7.noarch (@epel)
nginx-all-modules = 1:1.10.2-1.el7
Updated By: 1:nginx-all-modules-1.20.1-9.el7.noarch (epel)
nginx-all-modules = 1:1.20.1-9.el7
Error: Package: 1:nginx-mod-stream-1.20.1-9.el7.x86_64 (epel)
Requires: nginx(abi) = 1.20.1
Error: Package: libzip5-1.8.0-2.el7.remi.x86_64 (remi)
Requires: libzstd(x86-64) >= 1.3.6
Available: libzstd-1.3.4-1.el7.x86_64 (MariaDB)
libzstd(x86-64) = 1.3.4-1.el7
Error: Package: 1:nginx-mod-http-image-filter-1.20.1-9.el7.x86_64 (epel)
Requires: nginx(abi) = 1.20.1
Error: Package: 1:nginx-mod-mail-1.20.1-9.el7.x86_64 (epel)
Requires: nginx(abi) = 1.20.1
Error: Package: 1:nginx-1.10.2-1.el7.x86_64 (@epel)
Requires: nginx-filesystem = 1:1.10.2-1.el7
Removing: 1:nginx-filesystem-1.10.2-1.el7.noarch (@epel)
nginx-filesystem = 1:1.10.2-1.el7
Updated By: 1:nginx-filesystem-1.20.1-9.el7.noarch (epel)
nginx-filesystem = 1:1.20.1-9.el7
Error: Package: 1:nginx-mod-http-perl-1.20.1-9.el7.x86_64 (epel)
Requires: nginx(abi) = 1.20.1
Error: Package: 1:nginx-mod-http-xslt-filter-1.20.1-9.el7.x86_64 (epel)
Requires: nginx(abi) = 1.20.1
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
网络搜索会显示有关特定软件包的特定错误的问题，但这是否意味着我必须逐一解决这些问题？还是--skip-broken像它所说的那样可以安全地使用它？
我也安装了 Webmin，它显示 391 个软件包有更新，其中 35 个是安全更新。它正在提供更新，但我能相信它不会把事情搞砸吗？我相信yum，但是……
编辑：我决定继续运行yum update --skip-broken并让它做它能做的事情。在“已安装”、“依赖项已安装”和“已更新”阶段之后，输出结果如下：
Skipped (dependency problems):
gd.x86_64 0:2.0.35-27.el7_9 libzip5.x86_64 0:1.8.0-2.el7.remi libzstd.x86_64 0:1.3.4-1.el7
nginx-all-modules.noarch 1:1.20.1-9.el7 nginx-filesystem.noarch 1:1.20.1-9.el7 nginx-mod-http-image-filter.x86_64 1:1.20.1-9.el7
nginx-mod-http-perl.x86_64 1:1.20.1-9.el7 nginx-mod-http-xslt-filter.x86_64 1:1.20.1-9.el7 nginx-mod-mail.x86_64 1:1.20.1-9.el7
nginx-mod-stream.x86_64 1:1.20.1-9.el7 php-pecl-zip.x86_64 0:1.20.0-1.el7.remi.7.1
Replaced:
grub2.x86_64 1:2.02-0.64.el7.centos grub2-tools.x86_64 1:2.02-0.64.el7.centos grub2-tools-efi.x86_64 1:2.02-0.64.el7.centos
iwl7265-firmware.noarch 0:22.0.7.0-56.el7 python-parsedatetime.noarch 0:1.5-3.el7 python2-requests.noarch 0:2.6.0-0.el7
Complete!
现在 Webmin 中的视图如下所示 - 10 个包（其中 7 个与 nginx 相关的包被视为“安全更新”）：
