在新安装的 CentOS 7 操作系统上，我在尝试运行 yum update 时遇到此错误
Processing Conflict: kernel-3.10.0-514.6.1.el7.x86_64 conflicts kmod < 20-9
--> Finished Dependency Resolution
Error: Package: firefox-45.6.0-1.el7.centos.x86_64 (updates)
Requires: nspr >= 4.11.0
Installed: nspr-4.10.8-2.el7_1.x86_64 (@anaconda)
nspr = 4.10.8-2.el7_1
Error: Package: nss-3.21.3-2.el7_3.x86_64 (updates)
Requires: nss-softokn(x86-64) >= 3.16.2.3-14.2
Installed: nss-softokn-3.16.2.3-13.el7_1.x86_64 (@anaconda)
nss-softokn(x86-64) = 3.16.2.3-13.el7_1
Error: Package: 1:libguestfs-1.32.7-3.el7.centos.2.x86_64 (updates)
Requires: supermin5 >= 5.1.16-2
Installed: supermin5-5.1.10-1.2.el7.x86_64 (@anaconda)
supermin5 = 5.1.10-1.2.el7
Error: Package: libsemanage-2.5-5.1.el7_3.x86_64 (updates)
Requires: libsepol.so.1(LIBSEPOL_1.0)(64bit)
Error: Package: libsemanage-2.5-5.1.el7_3.x86_64 (updates)
Requires: libsepol.so.1(LIBSEPOL_1.1)(64bit)
Error: Package: 1:NetworkManager-1.4.0-14.el7_3.x86_64 (updates)
Requires: glib2 >= 2.46.2 …