hi all, today, I have this problem: # yum install gcc Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile * base: ftp.hosteurope.de * epel: mirror.de.leaseweb.net * extras: ftp.hosteurope.de * updates: ftp.hosteurope.de Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package gcc.x86_64 0:4.4.7-3.el6 will be installed --> Processing Dependency: libgomp = 4.4.7-3.el6 for package: gcc-4.4.7-3.el6.x86_64 --> Processing Dependency: cpp = 4.4.7-3.el6 for package: gcc-4.4.7-3.el6.x86_64 --> Processing Dependency: glibc-devel >= 2.2.90-12 for package: gcc-4.4.7-3.el6.x86_64 --> Processing Dependency: cloog-ppl >= 0.15 for package: gcc-4.4.7-3.el6.x86_64 --> Processing Dependency: libgomp.so.1()(64bit) for package: gcc-4.4.7-3.el6.x86_64 --> Running transaction check ---> Package cloog-ppl.x86_64 0:0.15.7-1.2.el6 will be installed --> Processing Dependency: libppl_c.so.2()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64 --> Processing Dependency: libppl.so.7()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64 ---> Package cpp.x86_64 0:4.4.7-3.el6 will be installed --> Processing Dependency: libmpfr.so.1()(64bit) for package: cpp-4.4.7-3.el6.x86_64 ---> Package glibc-devel.x86_64 0:2.12-1.107.el6_4.4 will be installed --> Processing Dependency: glibc-headers = 2.12-1.107.el6_4.4 for package: glibc-devel-2.12-1.107.el6_4.4.x86_64 --> Processing Dependency: glibc-headers for package: glibc-devel-2.12-1.107.el6_4.4.x86_64 ---> Package libgomp.x86_64 0:4.4.7-3.el6 will be installed --> Running transaction check ---> Package glibc-headers.x86_64 0:2.12-1.107.el6_4.4 will be installed --> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.12-1.107.el6_4.4.x86_64 --> Processing Dependency: kernel-headers for package: glibc-headers-2.12-1.107.el6_4.4.x86_64 ---> Package mpfr.x86_64 0:2.4.1-6.el6 will be installed ---> Package ppl.x86_64 0:0.10.2-11.el6 will be installed --> Finished Dependency Resolution Error: Package: glibc-headers-2.12-1.107.el6_4.4.x86_64 (updates) Requires: kernel-headers >= 2.2.1 Error: Package: glibc-headers-2.12-1.107.el6_4.4.x86_64 (updates) Requires: kernel-headers You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest how can I fix? thanks in advance