最近需要下服務器上安裝gitlab，在使用yum安裝postfix之后，啟動post報錯，進行debug顯示如下錯誤提示
[root@localhost ~]# systemctl status postfix.service ● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since 五 2018-03-02 09:43:51 CST; 27min ago Process: 11414 ExecStart=/usr/sbin/postfix start (code=exited, status=127) Process: 11411 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS) Process: 11408 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=127) 3月 02 09:43:51 localhost.localdomain systemd[1]: Starting Postfix Mail Transport Agent... 3月 02 09:43:51 localhost.localdomain aliasesdb[11408]: /usr/sbin/postconf: error while loading shared libraries: libmysqlclient.so.18: cannot op...rectory 3月 02 09:43:51 localhost.localdomain aliasesdb[11408]: /usr/bin/newaliases: error while loading shared libraries: libmysqlclient.so.18: cannot o...rectory 3月 02 09:43:51 localhost.localdomain postfix[11414]: /usr/sbin/postfix: error while loading shared libraries: libmysqlclient.so.18: cannot open...irectory 3月 02 09:43:51 localhost.localdomain systemd[1]: postfix.service: control process exited, code=exited status=127 3月 02 09:43:51 localhost.localdomain systemd[1]: Failed to start Postfix Mail Transport Agent. 3月 02 09:43:51 localhost.localdomain systemd[1]: Unit postfix.service entered failed state. 3月 02 09:43:51 localhost.localdomain systemd[1]: postfix.service failed.
錯誤顯示的是libmysqlclient.so.18沒有找到。
在google解決方法之后，找到的解決方法
在mysql的安裝路徑下找到libmysqlclient.so.18，再使用軟連接 到/usr/lib路徑下。
在完成添加之后啟動還是會顯示上面的錯誤，最終把postfix卸載掉 重新yum 安裝才正常啟動