After much neglect of my VPS (currently running CentOS 7.4.1708), I tried to run yum update, but after a long list of "Processing Dependency..." lines, the end of the output looked like this:
...
---> 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
Web searches produced questions about specific errors about specific packages, but does that mean I have to figure out what to do about each of these one by one? Or is it safe to use --skip-broken like it says is an option?
I also have Webmin, and it says that 391 packages have updates, 35 of which are security updates. It is offering to update them, but can I trust it to not mess things up? I trust yum, but...
EDIT: I decided to go ahead and run yum update --skip-broken and let it do what it could. After the "Installed", "Dependency Installed", and "Updated" stages, this was the end of the output:
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!
And now the view in Webmin looks like this - 10 packages (and the 7 related to nginx are considered "security updates"):
