rhel tutorial

Installing Telnet on centos/rhel/scientific Linux 6 7DescriptionBefore you install and use Telnet, you need to keep the following points in mind. Using Telnet in a public network (WAN) is a very bad idea. It transmits log-in data in plaintext format. Clear text is visible to everyone. If you still need telnet, it is strongly recommended that you only use it inside the LAN. You can use SSH as a workaround. But be sure not to log in wi

Linux System Management installation Rhel 6.4Enter the Installation interfaceHere you choose to skipClick NextSelect the installation languageSelect keyboardSelect the System storage methodChoose whether to format the storage deviceA computer name for the installed systemSelect time ZoneGive Root a passwordCan ignore or give a strong passwordChoose how to InstallFormat diskCreating partitionsChoose default here, go to the next stepSelect Custom NowIf

Linux System Management –rhel-7 Firewall ChapterLinux The firewall functionality of the system is implemented by the kernel:2.0 version of the kernel, the packet filtering mechanism is IPFW , the management tool is Ipfwadm2.2 version of the kernel, the packet filtering mechanism is ipchain , the management tool is IPChains2.4 and later kernels, the packet filtering mechanism is netfilter , the management tool is iptables3.10 version of the ker

Maybe Rhel 7 is too new to be easy for newbies to accept, so I'll be 6. The installation of X is written here for reference.1) Virtual machine settings, select the disc file, set the allocated memory size, the size of the disk settings ... 2) Enter the system installation interface and enter directly: ? 3) Select Skip Skip installation media check ?4) directly Next5) Use 中文版 during installation, direct Next:6) Select the keyboard type and select U.

" the required authentication function modules in it as needed, thereby truly realizing the "authentication function, On demand ". The PAM architecture looks like this In Rhel, Pam verification module, storage location in/lib/security, such as pam_limits.so, pam_group.so, etc. The configuration file of the PAM authentication module, which is stored in the location/etc/security, such as the pam_limits.so authen

Virtual Networking Computing (VNC) is a Kind of remote sharing system, makes it possible to take control of any other computer connected T o Internet. Keyboard and mouse clicks can easily transmit from one computer to another. It helps administrator and technical staff to manage their servers and desktops without being to the same location Physica Lly.VNC is a open source application created in late 1990′s. It is independent and was compatible with Windows and unix/linux. Means a normal Windows

System: RHEL6.5 + oracle11g x86_64 (installation on CentOS is similar to this)Use local Yum source (download Pdksh package in advance), specific process reference (for Rhel/centos): http://www.cnblogs.com/chinas/p/4536181.htmlFirst, the official website describes the general process of installation reference: as root logs into the system as root checking the Hardware Requirements Check the required hardware conditions checking th

Linux System Management installation Rhel 6.4Enter the Installation interface650) this.width=650; "height=" 413 "src=" http://s3.51cto.com/wyfs02/M00/6F/E7/wKioL1Ws-JLiMufgAAGA8Ip7lT8852.jpg " alt= "Wkiol1ws-jlimufgaaga8ip7lt8852.jpg"/>Here you choose to skip650) this.width=650; "height=" 323 "src=" http://s3.51cto.com/wyfs02/M00/6F/EB/wKiom1Ws9rHgYTEuAAEj_RQ4PVs085.jpg " alt= "Wkiom1ws9rhgyteuaaej_rq4pvs085.jpg"/>Click Next650) this.width=650; "heigh

First, open the installed virtual machine, because we did not set any Rhel installation source, so it will be as prompt:Second, the figure is identified as two ways to change the disc settings, physical or virtual disc can be. 1. Select ①:2. Select ②, click Settings ... ：After setting up the CD, restart the virtual machine to enter the installation interface.Four, enter the installation interface, there are five options, respectively: 1. Install or up

When you install Rhel, if you do not have a graphical interface installed, or if you later want to uninstall the graphical interface, you can execute the following command 1 Configure the correct Yum source, you can refer to this blog related articles (in search of input yum can be searched) 2) Use Yum grouplist simple view # Yum Grouplist|grep-i DesktopGeneral Purpose DesktopDesktopDesktop Debugging and Performance ToolsDesktop PlatformDesktop Platf

1, Systemctl is Rhel 7 of the service management tools of the main tool, it blends the former service and Chkconfig functions in one. You can use it to enable/disable services either permanently or only in the current session. Systemctl can list the running service status, as shown in figure: Systemd-cgls lists the running processes in a tree, which can recursively display control group content. As shown in figure: 2. How do I start/close, enab

When a new SCSI device is installed in Rhel 6, a disk drift may occur, such as the original system disk is/DEV/SDA, add new device, restart the system, the letter to the last, such as/DEV/SSDA. The reason for the drift of disk character In the Linux kernel, the SCSI hard drive letter assignment is related to the drive scan to the hard disk sequence, that is, the first scan to the hard drive letter is/DEV/SDA, the second disk letter is/dev/sdb ... by

Find your closest mirror site from the http://mirror-status.centos.org Web site Below I take mirrors.163.com as our mirror image site 1. To use the source of the CentOS, you have to remove the Rhel update source, or disable it, and you need to remove the RHEL6 yum tool. #cd/ETC/YUM.REPOS.D #mv Packagekit-media.repo Packagekit-media.repo.back It is backed up for accidental recovery, if any other related source settings are deleted, or backed up using t

ISO file has been connected. # MOUNT/DEV/CDROM/MNT//Mount CD to/mnt directory # CD/ETC/YUM.REPOS.D//Enter into Yum config file directory # MV Rhel-debuginfo.repo Rhel-debuginfo.repo.bak//backup system with its own profile, you can also delete # VI Local.repo//Create a new yum configuration file and write the following to the file [Server] Name=server Baseurl=file:///mnt/server Gpgcheck=0 Enabled=1

like this In Rhel, Pam's verification module, storage location in/lib/security, such as pam_limits.so, pam_group.so, etc. The configuration file of the PAM authentication module, which is stored in the location/etc/security, such as the pam_limits.so authentication module corresponding to the configuration file limits.conf,pam_group.so verify the module corresponding to the configuration file group.conf. PAM veri

The original addressMware Tools is one of the important components for virtual machines (VMS) in order get excellent performance. It is a group of utilities, enhances the overall performance of the virtual machine ' s guest operating system ( OS) and improves management of the VM. Without the VMware Tools, guest OS performance would lacks some of the important functionality. Below steps shows how to install the VMware Tools on RHEL 7, CentOS 7 and Ora

allAuthName "Nagios Access"Authuserfile/etc/nagios/htpasswd.usersRequire Valid-userAuthType BasicThis is the end of the installation, the following is the error that occurred during my installation, and the workaroundFive, error1. Network card Traffic Error: Return Code of 127 is out of bounds-plugin could be missing/usr/lib/nagios/plugins/The Traffic check script is missing under this folder, then empowerll/usr/lib/nagios/plugins/check_traffic.shCd/usr/lib/nagios/pluginschmod 777-r PluginsChow

How to add a new swap partition to the RHEL system-Linux general technology-Linux technology and application information. The following is a detailed description. Solution: 1. if you want to add a swap partition (if you want to add/dev/hdb5 as the swap partition), the hard disk cannot be in use (that is, the partition cannot be loaded, the swap space is not activated ). The partition table cannot be modified during use, because the kernel may not be a

-j ACCEPT note that -A input-j REJECT -- reject-with icmp-host-prohibited, otherwise it will not take effect. 6. Restart iptables. [Root @ localhost sysconfig] #/etc/rc. d/init. d/iptables restart Flushing firewall rules: [OK] Setting chains to policy ACCEPT: filter [OK] Unloading iptables modules: [OK] Applying iptables firewall rules: [OK] Loading additional iptables modules: ip_conntrack_netbios_ns ip_conntrack_ftp [OK] 7. Connect to the VNC Server using VNC Viewer on a Windows machine Downl

First, the installation sequence Shun1. Install the Windows operating system first2. Re-install the RHEL 7 systemIi. in grub, add Windows boot informationBecause after installing RHEL7, only the boot information of Linux, but not the information of Windows system, need to be added manually.1. Modify the Grub custom profile (in this case Windows Server 2008 is installed on drive C, and Windows automatically establishes a hidden partition when installed