centos administration

Upgrade CentOS 6.5 to CentOS 7 CentOS7 has been released, and I have been trying to test it on it. I have never had a chance. I can finally feel CentOS7 this time. CentOS6.5 has been used for some time, but since its kernel version remains at 2.6.32, it is decided to upgrade to CentOS7. By the way, we upgraded the kernel to the latest 3.15. After the upgrade, the disk suddenly has no space. When querying th

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Note: This is not the most highly recommended method to move from centos 6 to centos 7... but it can be med, at your own risk, if the tool says the risk is slight or none. we wowould never recommend using this method with any medium, high or extreme issues present. Centos upgrade Tool 1. Location of the Tool The tool is currently available from the testing Reposi

View System Information in CentOS-CentOS command I. View cpu more/proc/cpuinfo|grep"modelname" grep"modelname"/proc/cpuinfo If you feel more comfortable to watch grep"modelname"/proc/cpuinfo|cut-f2-d: How about linux commands. Ii. Check in [root@CentOS~]#grepMemTotal/proc/meminfo [root@CentOS~

Upgrading from CentOS 6 to CentOS 7 In just a few weeks after the release of Red Hat Enterprise 7, CentOS7 was also released, and included the equally exciting features as red hat. In addition to the long-awaited systemd and popular Docker, this release also makes it possible for the system to automatically update from version 6 to version 7 without installing the image file. Although the upgrade still need

Recording CentOS-7-x86_64-DVD-1503 and Windows 7 single hard disk dual system installation, Windows 7 installation centos My original idea was: Win guided CentOS, but eventually it turned into CentOS guided Win. It's a coincidence. Because I plan to use a USB flash drive to burn an image and start it directly from the

CentOS installation + configuration + remote, centos Configuration I switched to an article that I think is more technical. ^_^ I recently made a deal with CentOS and encountered many problems. So I read some blogs and solved some problems, but none of them were comprehensive, so I want to come to an installation, configuration, and remote trial version tutorial

The CentOS of Linux Learning (i)----install CentOS 7 in a VMware virtual machine First, VMware Introduction: VMware is a Virtual PC software that can virtual a new hardware environment on an existing control system, which is equivalent to simulating a new PC to actually run two separate operating systems on a single machine. The main features of VMware: two or more operating systems can be used on the same

First, VMware Introduction: VMware is a Virtual PC software that can virtual a new hardware environment on an existing control system, which is equivalent to simulating a new PC to actually run two separate operating systems on a single machine. Main features of VMware: You can use more than two operating systems on the same PC without distinguishing or rebooting; The native system can communicate with the virtual machine system network; You can set and modify the hardware environ

Yum Error: * C5-media:File:///media/CentOS/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] without that file or directory: '/media/centos/repodata/repomd.xml 'Trying other mirror.File:///media/cdrecorder/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] without that file or directory: '/media/cdrecorder/repodata/ Repomd.xml 'Trying other mirror.File:///media/cdrom/repodata/repomd.xml: [Errno 5] OSError:

Centos and centos Find the new disk/dev/sdb [Root @ localhost ~] # Fdisk-l Disk/dev/sdb: 375.8 GB, 375809638400 bytes, 734003200 sectorsUnits = sector of 1*512 = 512 bytesSector size (logical/physical): 512 bytes/512 bytesI/O size (minimum/optimum): 512 bytes/512 bytesCreate a pv (physical volume) [root @ localhost ~] # Pvcreate/dev/sdbPhysical volume "/dev/sdb" successfully created Resize vg (volume group)

1. When installing CentOS with a USB flash drive, partition partitions should note: The system (contains Win7) can only be 4 primary partitions, so you can only delete a primary partition or in the extended partition in the free partition to establish the directory.2, CentOS at the end of the installation step, the boot loader option only "installed on the USB stick" One, note: not easily installed on the M

Disable the CentOS 6 and CentOS 7 firewalls. CentOS6.5 view the Firewall Status: 1 [Linuxidc @ localhost ~] $ Service iptable status Display result: 1 2 3 4 5 [Linuxidc @ localhost ~] $ Service iptable status Redirecting to/bin/systemctl status iptable. service ● iptable. service Loaded: not-found (Reason: No such file or directory) Active: inactive (dead) -- indicates that the

Installation InstructionsSystem Environment: Centos-6.3Installation software: mongodb-linux-x86_64-2.2.2.tgz: Http://www.mongodb.org/downloadsInstallation machine: 192.168.15.237Upload location:/usr/local/Software Installation Location:/usr/local/mongodbData storage location:/var/mongodb/dataLog storage location:/var/mongodb/logsCheck if MongoDB has been installedRpm-qa | grep MongoDBService MongoDB Status Install [[emailprotected]/]# cd usr/local/ [

Bend the Host Name of CentOS 7, and bend the Host Name of CentOS 7 In CentOS 6, it is easy to modify the host name.hostnameCommand to permanently modify the Host Name and directly write it into the file/etc/sysconfig/network. However, in CentOS 7, the host name is not that simple, and it involves some bending. In

Install CentOS 7 and centos with a USB flash drive on Windows 7 If you already have Windows 7, you have to install CentOS 7 again.1. Divide disk space Separate the installation space for CentOS 7 from the disk. If you have multiple hard disks, you must divide them into 2 GB space (in fact, 1 GB is enough) as boot. This

-13t3jSecond, CentOS Introduction:CentOS (Community ENTerprise Operating System) is one of the Linux distributions and is compiled from Red Hat ENTerprise Linux based on source code released under open source rules. Because of the same source code, some servers that require a high degree of stability are used with CentOS instead of the commercial version of Red Hat Enterprise Linux. The difference between t

Install the CentOS Linux platform with VMware Workstation 11 virtual software to achieve basic lab requirements. Set up a directory to store the CentOS guest system; 650) this.width=650; "title=" image "style=" border-top:0px;border-right:0px;background-image:none;border-bottom:0 px;padding-top:0px;padding-left:0px;border-left:0px;padding-right:0px; "border=" 0 "alt=" image "src=" http:// S3.5

Well, my lack of knowledge of network protocols and IP configuration has left me here for almost a day to fix it. It can be said that basically the network encountered problems I have met. Here, make a note of the correct steps to configure the network for CentOS. Hope that the future less detours.The first thing I would like to say is that I am installing the Centos6.3 version on VMware, and I am installing it in a way that does not have a graphical

BodyFirst, VMware Introduction:VMware is a Virtual PC software that can create a new hardware environment on an existing operating system, equivalent to simulating a new PC to actually run two separate operating systems on a single machine.Key Features of VMware: Two or more operating systems can be used on the same PC without the need to differentiate or re-boot; The native system can communicate with the virtual machine system network; You can set and modify the hardware envir