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Another app is currently holding the yum lock; waiting for it to exit...
1.1 Another app is currently holding the yum lock; waiting for it toexit...有时用yum安装docker或者升级时，会出现以下情况：1.1.1 现象[root@dockerserver2~]# yum install dockerLoadedplugins: fastestmirror, langpacksRepodatais over 2 weeks old. Install yum-cron? Or ...
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Oracle12c连接问题[ORA-28040]
ORA-28040: 没有匹配的验证协议修改文件:$ORACLE_HOME/network/admin/sqlnet.ora加入如下: SQLNET.ALLOWED_LOGON_VERSION=8
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Sqlplus 多种连接方式
1.1.1 Sqlplus 多种连接方式.敲sqlplus/nolog就是使SQL*PLUS启动,但不登陆Oracle数据库。然后需要使用connect命令连接Oracle。SQL>connu/p[@ip:port/instance_name ]|[service_name]----sqlplus hr/hr ------>直接连，不走监听，直接在本地连sqlplus / as sysdba&...
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Starting httpd: httpd: Could not reliably determine the server
1.1 启动apache遇到错误Startinghttpd: httpd: Could not reliably determine the server's fully qualified domainname 1.1.1 问题描述[root@masterPackages]# service httpd start Startinghttpd: httpd: Could not reliably determine the server's fully qualified domainnam...
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TNS-12518: TNS:listener could not hand off client connection
TNS-12518: TNS:listener could not hand off client connectionTNS-12536: TNS:operation would blockTNS-12560: TNS:protocol adapter errorTNS-00506: Operation would blockLinux Error: 11: Resource temporarily unavailable
