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I am getting these error while installing MySQL:

sudo yum install mysql-community-server

Loaded plugins: extras_suggestions, langpacks, priorities, update-motd
amzn2-core               
| 2.4 kB 00:00:00 mysql-connectors-community      
| 2.5 kB 00:00:00 mysql-tools-community       
| 2.5 kB 00:00:00 mysql57-community        
| 2.5 kB 00:00:00 14 packages excluded due to repository priority
protections Resolving Dependencies
–> Running transaction check
—> Package mysql-community-server.x86_64 0:5.7.23-1.el6 will be installed
–> Processing Dependency: mysql-community-common(x86-64) = 5.7.23-1.el6 for package: mysql-community-server-5.7.23-1.el6.x86_64
–> Processing Dependency: mysql-community-client(x86-64) >= 5.7.9 for package: mysql-community-server-5.7.23-1.el6.x86_64
–> Processing Dependency: libsasl2.so.2()(64bit) for package: mysql-community-server-5.7.23-1.el6.x86_64
–> Running transaction check
—> Package mysql-community-client.x86_64 0:5.7.23-1.el6 will be installed
–> Processing Dependency: mysql-community-libs(x86-64) >= 5.7.9 for package: mysql-community-client-5.7.23-1.el6.x86_64
—> Package mysql-community-common.x86_64 0:5.7.23-1.el6 will be installed
—> Package mysql-community-server.x86_64 0:5.7.23-1.el6 will be installed
–> Processing Dependency: libsasl2.so.2()(64bit) for package: mysql-community-server-5.7.23-1.el6.x86_64
–> Running transaction check
—> Package mariadb-libs.x86_64 1:5.5.60-1.amzn2 will be obsoleted
–> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64
–> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package:
2:postfix-2.10.1-6.amzn2.0.1.x86_64
—> Package mysql-community-libs.x86_64 0:5.7.23-1.el6 will be obsoleting
—> Package mysql-community-server.x86_64 0:5.7.23-1.el6 will be installed
–> Processing Dependency: libsasl2.so.2()(64bit) for package: mysql-community-server-5.7.23-1.el6.x86_64
–> Finished Dependency Resolution
Error: Package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64 (installed)
   Requires: libmysqlclient.so.18()(64bit)
   Removing: 1:mariadb-libs-5.5.60-1.amzn2.x86_64 (@amzn2-core)
    libmysqlclient.so.18()(64bit)
   Obsoleted By: mysql-community-libs-5.7.23-1.el6.x86_64 (mysql57-community)
    ~libmysqlclient.so.20()(64bit)
   Available: 1:mariadb-libs-5.5.56-2.amzn2.x86_64 (amzn2-core)
    libmysqlclient.so.18()(64bit)
Error: Package: mysql-community-server-5.7.23-1.el6.x86_64 (mysql57-community)
   Requires: libsasl2.so.2()(64bit)
Error: Package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64 (installed)
   Requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
   Removing: 1:mariadb-libs-5.5.60-1.amzn2.x86_64 (@amzn2-core)
    libmysqlclient.so.18(libmysqlclient_18)(64bit)
   Obsoleted By: mysql-community-libs-5.7.23-1.el6.x86_64 (mysql57-community)
    Not found
   Available: 1:mariadb-libs-5.5.56-2.amzn2.x86_64 (amzn2-core)
    libmysqlclient.so.18(libmysqlclient_18)(64bit)
You could try using –skip-broken to work around the problem
You could try running: rpm -Va –nofiles –nodigest

[ec2-u[email protected] ~]$
[[email protected] ~]$ sudo yum update 

Loaded plugins:
extras_suggestions, langpacks, priorities, update-motd 14 packages
excluded due to repository priority protections Resolving Dependencies
–> Running transaction check
—> Package mariadb-libs.x86_64 1:5.5.60-1.amzn2 will be obsoleted
–> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64
–> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package:
2:postfix-2.10.1-6.amzn2.0.1.x86_64
—> Package mysql-community-libs.x86_64 0:5.7.23-1.el6 will be obsoleting
–> Processing Dependency: mysql-community-common(x86-64) >= 5.7.9 for package: mysql-community-libs-5.7.23-1.el6.x86_64
—> Package mysql-community-libs-compat.x86_64 0:5.7.23-1.el6 will be obsoleting
—> Package mysql57-community-release.noarch 0:el6-8 will be updated
—> Package mysql57-community-release.noarch 0:el6-10 will be an update
–> Running transaction check
—> Package mariadb-libs.x86_64 1:5.5.60-1.amzn2 will be obsoleted
–> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64
–> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package:
2:postfix-2.10.1-6.amzn2.0.1.x86_64
—> Package mysql-community-common.x86_64 0:5.7.23-1.el6 will be installed
–> Finished Dependency Resolution
Error: Package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64 (installed)
   Requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
   Removing: 1:mariadb-libs-5.5.60-1.amzn2.x86_64 (@amzn2-core)
    libmysqlclient.so.18(libmysqlclient_18)(64bit)
   Obsoleted By: mysql-community-libs-compat-5.7.23-1.el6.x86_64 (mysql57-community)
    ~libmysqlclient.so.16(libmysqlclient_16)(64bit)
   Available: 1:mariadb-libs-5.5.56-2.amzn2.x86_64 (amzn2-core)
    libmysqlclient.so.18(libmysqlclient_18)(64bit)
Error: Package: 2:postfix-2.10.1-6.amzn2.0.1.x86_64 (installed)
   Requires: libmysqlclient.so.18()(64bit)
   Removing: 1:mariadb-libs-5.5.60-1.amzn2.x86_64 (@amzn2-core)
    libmysqlclient.so.18()(64bit)
   Obsoleted By: mysql-community-libs-compat-5.7.23-1.el6.x86_64 (mysql57-community)
    ~libmysqlclient.so.16()(64bit)
   Available: 1:mariadb-libs-5.5.56-2.amzn2.x86_64 (amzn2-core)
    libmysqlclient.so.18()(64bit) You could try using –skip-broken to work around the problem You could try running: rpm -Va –nofiles –nodigest