今天我想安装mariadb-server服务，但是突然间报了这么多错误。
[root@chaofeng ~]# yum install mariadb-server Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com * webtatic: us-east.repo.webtatic.com Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don‘t work you‘ll have to try removing/installing packages by hand (maybe package-cleanup can help). The program yum-complete-transaction is found in the yum-utils package. --> Running transaction check ---> Package mariadb-server.x86_64 1:5.5.64-1.el7 will be installed --> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-server-5.5.64-1.el7.x86_64 --> Processing Dependency: mariadb(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-server-5.5.64-1.el7.x86_64 --> Running transaction check ---> Package mariadb.x86_64 1:5.5.64-1.el7 will be installed ---> Package mariadb-libs.x86_64 1:5.5.64-1.el7 will be installed --> Processing Conflict: MariaDB-compat-10.2.31-1.el7.centos.x86_64 conflicts mariadb-libs < 1:10.1.0 Removing mariadb-libs.x86_64 1:5.5.64-1.el7 - u due to obsoletes from installed MariaDB-compat-10.2.31-1.el7.centos.x86_64 --> Restarting Dependency Resolution with new changes. --> Running transaction check ---> Package mariadb-libs.x86_64 1:5.5.64-1.el7 will be installed --> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-server-5.5.64-1.el7.x86_64 --> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-5.5.64-1.el7.x86_64 --> Finished Dependency Resolution Error: MariaDB-compat conflicts with 1:mariadb-libs-5.5.64-1.el7.x86_64 Error: Package: 1:mariadb-server-5.5.64-1.el7.x86_64 (base) Requires: mariadb-libs(x86-64) = 1:5.5.64-1.el7 Installed: MariaDB-compat-10.2.31-1.el7.centos.x86_64 (@mariadb) mariadb-libs(x86-64) = 1:10.1.38-1.el7.centos Error: Package: 1:mariadb-5.5.64-1.el7.x86_64 (base) Requires: mariadb-libs(x86-64) = 1:5.5.64-1.el7 Installed: MariaDB-compat-10.2.31-1.el7.centos.x86_64 (@mariadb) mariadb-libs(x86-64) = 1:10.1.38-1.el7.centos You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest
报了这么多错误，我也是花费了大量的心思去解决，可是总是不尽人意，还是报错误，突然见我又仔细的查看一下错误的原因，细心一点才发现自己解决错了放心。
大家来看上面的青色背景的话，猛地一看这么多，脑子都懵逼了。不过想要解决，我们得自己慢慢研究才行
仔细一看其实最主要的愿意是青色背景的第一行，也就是这个
Error: MariaDB-compat conflicts with 1:mariadb-libs-5.5.64-1.el7.x86_64
说白了就是MariaDB-compat这个包和mariadb-libs这个包发生了冲突，既然发生了冲突，我们就要看看安装这个mariadb-server的时候，它需要的是这两个冲突包其中的哪个包，仔细一看
不难发现，mariab-server需要安装的是mariadb-libs这个包，但是安装这个包的时候发现“Installed”，也就是后面的MariaDB-compat这个包已经存在系统上面了，那么解决的方法就是把MariaDB-compat给卸载了。
现在我搜索一下
[root@chaofeng ~]# rpm -qa | grep MariaDB MariaDB-common-10.2.31-1.el7.centos.x86_64 MariaDB-compat-10.2.31-1.el7.centos.x86_64
发现有两个包，那我干脆两个都直接卸载算了。我使用这种方法居然还不行
[root@chaofeng ~]# rpm -qa | grep MariaDB | xargs rpm -e error: Failed dependencies: libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64 libmysqlclient.so.18()(64bit) is needed by (installed) zabbix-server-mysql-4.4.6-1.el7.x86_64 libmysqlclient.so.18()(64bit) is needed by (installed) perl-DBD-MySQL-4.023-6.el7.x86_64 libmysqlclient.so.18()(64bit) is needed by (installed) zabbix-proxy-mysql-4.4.7-1.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) zabbix-server-mysql-4.4.6-1.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) perl-DBD-MySQL-4.023-6.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) zabbix-proxy-mysql-4.4.7-1.el7.x86_64
原来是卸载的包之间也是有依赖的，所以卸载的时候有一个先后顺序，
[root@chaofeng ~]# rpm -e MariaDB-compat-10.2.31-1.el7.centos.x86_64 --force rpm: only installation and upgrading may be forced
接着卸载另一个
[root@chaofeng ~]# rpm -e MariaDB-common-10.2.31-1.el7.centos.x86_64
两个都卸载完毕了。这样子就清楚了
终于可以安装mariadb-server了
[root@chaofeng ~]# yum install mariadb-server Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com * webtatic: us-east.repo.webtatic.com Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don‘t work you‘ll have to try removing/installing packages by hand (maybe package-cleanup can help). The program yum-complete-transaction is found in the yum-utils package. --> Running transaction check ---> Package mariadb-server.x86_64 1:5.5.64-1.el7 will be installed --> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-server-5.5.64-1.el7.x86_64 --> Processing Dependency: mariadb(x86-64) = 1:5.5.64-1.el7 for package: 1:mariadb-server-5.5.64-1.el7.x86_64 --> Running transaction check ---> Package mariadb.x86_64 1:5.5.64-1.el7 will be installed ---> Package mariadb-libs.x86_64 1:5.5.64-1.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved =========================================================================================================================================================== Package Arch Version Repository Size =========================================================================================================================================================== Installing: mariadb-server x86_64 1:5.5.64-1.el7 base 11 M Installing for dependencies: mariadb x86_64 1:5.5.64-1.el7 base 8.7 M mariadb-libs x86_64 1:5.5.64-1.el7 base 759 k Transaction Summary =========================================================================================================================================================== Install 1 Package (+2 Dependent packages) Total download size: 21 M Installed size: 111 M Is this ok [y/d/N]:
真是美滋滋。