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MegaCli 安装和基本使用 下载RPM包wget http://mirror.cogentco.com/pub/misc/MegaCli-8.07.14-1.noarch.rpmMegaCli-8.07.14-1.noarch.rpm安装rpm -ivh MegaCli-8.07.14-1.noarch.rpm安装完，就会在/opt/下创建个MegaRAID目录，文件都在里面添加软连接ln -s /opt/MegaRAID/MegaCli/MegaCli64 /usr/bin/MegaCli查看帮助手册MegaCli -h查看raid 状态MegaCli -LdInfo -lAll -aALLState : Degraded（降级） State : Offline（离线） State : Optimal（正常） Number Of Drives : 2 RAID组包含2块磁盘。 查看硬盘数量以及有无损坏，有几行就是有几个硬盘MegaCli -PDList -aALL |grep "Firmware state"硬盘状态:Firmware state: Online, Spun Up 磁盘正常 Firmware state: Unconfigured(good), Spun Up 磁盘已安装，但未启用 Firmware state: Unconfigured(bad) 故障 Firmware state: Failed 故障 Firmware state: Rebuild 重建，一般在更换磁盘时显示查看硬盘所有信息MegaCli -PDList -aALL部分参数解释:Slot Number: ---硬盘槽号PD Type: -----磁盘接口类型InquiryData: -----硬盘的序列号、型号、固件版本Raw Size: -----磁盘原始大小NonCoerced Size: -----磁盘标准大小CoercedSize: ------磁盘最大可用大小Medai Error Count: ------表示磁盘可能错误，可能是磁盘有坏道，这个值不为0值得注意，数值越大，危险系数越高。Other Error Count: ------表示磁盘可能存在松动，可能需要重新再插入。Predictive Failure Count: -----预测故障计数查看raid级别第一种：MegaCli -LdPdInfo -aALL|grep "RAID Level"raid级别:RAIDLevel : Primary-0, Secondary-0, RAID Level Qualifier-0 这就是raid00 0 0 是raid01 0 0 是raid15 0 3 是raid51 3 0 是raid10raid1 还需要结合Span Depth的值来判断Span Depth : 2 表示共2个RAID1盘组做成了RAID10，1表示1个RAID1盘组还有一种情况：Primary-1， Secondary-3， RAID LevelQualifier-0 也是表示 RAID-10;也可以这么显示raid级别，输入就会返回，这种的基本准确第二种：MegaCli -ShowSummary -aALL|grep "RAID Level"如报一下错误[root@localhost MegaCli]# ./MegaCli64 -PDList -aALL ./MegaCli64: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory解决办法 ：安装libncurses.so.5yum install libncurses.so.5安装 libncurses.so.5 之后，如果还是报错，就安装 libncurses 相关软件包yum install libncurses* -
centos7 安装donet 1. centos7-安装dotnet工具安装epel源[root@sonarqube config]# yum install epel-release -y 导入dotnet源 [root@sonarqube config]# rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm 查找dotnet安装包 [root@sonarqube config]# yum search dotnet-sdk安装最新dotnet[root@sonarqube config]# yum -y install dotnet-sdk-6.0验证安装是否成功[root@sonarqube config]# dotnet --version 6.0.1022. dotnet build报错问题描述: linux下dotnet build 时候出现 .1.201/NuGet.targets(124,5): error : Unable to load the service index for source https://api.nuget.org/v3/index.json.解决方案解决: /etc/pki/tls/certs/ 下面少了证书 ca-certificates.crt 拷贝下面内容到证书里面-----BEGIN CERTIFICATE----- MIIGKjCCBRKgAwIBAgIQAqQdLHDmymcvfOktofoYODANBgkqhkiG9w0BAQsFADBE MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMR4wHAYDVQQDExVE aWdpQ2VydCBHbG9iYWwgQ0EgRzIwHhcNMjAwNTI2MDAwMDAwWhcNMjEwNDIxMTIw MDAwWjBqMQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UE BxMHU2VhdHRsZTEZMBcGA1UEChMQQW1hem9uLmNvbSwgSW5jLjEZMBcGA1UEAwwQ 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CentOS/RHEL Linux安装EPEL第三方软件源 EPEL（Extra Packages for Enterprise Linux） 是由 Fedora 社区打造，为 RHEL 及衍生发行版如 CentOS等提供高质量软件包的项目。装上了 EPEL，就像在 Fedora 上一样，可以通过 yum install 软件包名，即可安装很多以前需要编译安装的软件、常用的软件或一些比较流行的软件，比如现在流行的nginx、htop、ncdu、vnstat、axel、cmake3、libsodium-devel等等软件包/依赖包，都可以使用EPEL很方便的安装更新。安装EPEL源目前可以直接通过执行命令： yum install epel-release 直接进行安装如果服务器或VPS是在国内，可以设置为国内的源，执行命令：sed -i "s@^#baseurl=http://download.fedoraproject.org/pub@baseurl=http://mirrors.aliyun.com@g" /etc/yum.repos.d/epel*.repo sed -i "s@^metalink@#metalink@g" /etc/yum.repos.d/epel*.repo{alert type="warning"}如果是CentOS 8，请务必将前面两条命令里面的http都改成https。{/alert}如果前面命令无法安装 epel-release 可以尝试以下方法CentOS/RHEL 5 ：rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-5.noarch.rpmCentOS/RHEL 6 ：rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpmCentOS/RHEL 7 ：rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm###CentOS/RHEL 8 ： rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm Ok，如果不报错的话，epel源就安装完毕。使用EPEL源安装软件现在就可以执行：yum install 软件包名进行安装了，nginx、htop、ncdu、vnstat等等一些常用的软件都灰常简单的装上了。心动了吧赶快试试吧。
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