I follow the hint
https://linuxhint.com/upgrade-kernel-centos-7/
and type this command at the kernel :
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
It gives the following error :
curl: (7) Failed connect to www.elrepo.org:443; Connection timed out error: https://www.elrepo.org/RPM-GPG-KEY-elrepo.org: import read failed(2).
Would you please tell me the alternative to upgrade my kernel of Centos 7 ?
My current one is
Linux localhost.localdomain 3.10.0-1062.4.1.el7.x86_64 #1 SMP Fri Oct 18 17:15:30 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
export https_proxy=https://your.proxy.server:port/
to enable a proxy server for curl. – doneal24 Nov 7 at 2:54