Error: Package: mysql-community-server-5.6.40-2.el7.x86_64 (mysql56-community)
Requires: libc.so.6(GLIBC_2.17)(64bit)
Error: Package: mysql-community-server-5.6.40-2.el7.x86_64 (mysql56-community)
Requires: systemd
Error: Package: mysql-community-libs-5.6.40-2.el7.x86_64 (mysql56-community)
Requires: libc.so.6(GLIBC_2.17)(64bit)
Error: Package: mysql-community-server-5.6.40-2.el7.x86_64 (mysql56-community)
Requires: libstdc++.so.6(GLIBCXX_3.4.15)(64bit)
Error: Package: mysql-community-client-5.6.40-2.el7.x86_64 (mysql56-community)
Requires: libc.so.6(GLIBC_2.17)(64bit)
You could try using --skip-broken to work around the problem
在centos上安裝mysql 報上名的錯誤，經查詢發現系統已經安裝了libc.so.6，
#cd /etc/yum.repos.d/
#sudo vi mysql-community.repo
找到mysql-56-community
將enable置為0 enable=0
重新安裝mysql sudo yum install mysql-server
原因大約是這個：軟件的源有錯誤，要把那個禁用掉
https://unix.stackexchange.com/questions/280385/can-not-install-mysql-server-on-centos-6-7-32bit-error-need-rpm