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Linux Installation and Configuration (Level 1)
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This chapter is from the reserve
This section provides a basic step-by-step installation of Red Hat Linux from a CD-ROM. There are many different ways to proceed with an install, and the Red Hat Linux installer can provide a graphical or text-based interface in a variety of modes. The instance approach outlined here should labor with any PC and can breathe used as a starting point for learning more about installing Red Hat Linux.
To rep started, insert the first Red Hat Linux CD-ROM and reboot your computer. You'll first behold a boot screen that offers a variety of options for booting. These options (shown in figure 3.1) are
<ENTER>—Start the install using a graphical interface
text—Start the install using a graphical text interface
lowres—Start the install using a 640x480 resolution
nofb—Start the install avoiding use of a video framebuffer
expert—Offer manual installation and configuration during the install, and disable autoprobing of hardware by the installer
linux rescue—Boot to single-user mode with a root operator prompt, disabling X, multitasking and networking
linux dd—Use a driver disk and possibly one or more kernel arguments (such as linux mem=512M expert) to enable inevitable types of hardware, such as networking cards
Figure 3.1 Select a nature of installation, installation mode, or rescue installation when first installing Red Hat Linux.
Other options that can breathe used at the boot prompt involve setting a specific resolution and color depth for the installation. This is done by typing vga= at the boot prompt, along with a number such as
773—use 256 colors at 1024x768
775—use 256 colors at 1280x1024
791—use thousands of colors at 1024x768
794—use thousands of colors at 1280x1024
Function keys can breathe used at the boot prompt to rep more information about an installation mode or to enable a mode. Pressing F2 provides a single screen of abet text. Pressing F3 gives information about the expert mode. Pressing F4 describes how to pass kernel arguments. Pressing F5 describes Red Hat's rescue mode.
Press the spacebar to halt an automatic boot to the install. nature the word text at the boot prompt and press Enter to continue. The installer's kernel will load, and you'll breathe asked to select a language for the installation, as shown in figure 3.2.
Use the Tab key to navigate to scrolling lists or buttons in the graphical dialog box. Scroll through the list to highlight a language, and then use the Tab key to highlight the OK button and press Enter. You'll then breathe asked to select a keyboard for the install, as shown in figure 3.3.
Figure 3.2 Select a language to use when installing Red Hat Linux.
Figure 3.3 Select a default keyboard to use when installing and using Red Hat Linux.
Again, select a keyboard, and then highlight the OK button and press Enter. You'll next breathe asked to select a pointing device, as shown in figure 3.4.
Figure 3.4 Select a pointing device to use when installing and using Red Hat Linux.
Select a mouse nature to use for Red Hat Linux sessions. Note that Red Hat Linux supports USB devices, including USB mice. If you accommodate a two-button mouse, select it by scrolling through the list. Note that three-button emulation will breathe automatically selected. (This emulation enables a middle-mouse button to breathe simulated when both the left and right mouse buttons are pressed simultaneously.) Highlight OK to continue. You'll behold a splash screen and will breathe offered the chance to proceed back to change the previous settings. If the settings are correct, highlight the OK button and press Enter. You'll breathe asked to select a nature of installation, as shown in figure 3.5.
Figure 3.5 Select a nature of Red Hat Linux installation.
Select a nature of installation using your cursor keys and the Tab key. The Workstation, Server, and Laptop installations present a unique set of preselected software libraries and packages. The Custom installation allows selection of individual software packages with the faculty to resolve any dependency issues automatically. Software dependencies should breathe resolved in order to accommodate a stable system because some software packages depend on other software packages to duty properly.
You can use Linux virtual consoles during installation to monitor the hardware detection, gain access to a single-user shell, and view progress of the installer script. When using a graphical installer, press Ctrl+Alt+F1+4 to navigate to the various screens. Press Alt+F7 to jump back to the installer. When performing a text-based installation, use Alt+F1+4; use Alt+F1 to jump back to a text-based install, and Alt+F5 to jump back to the install screen if you use a graphical install.
In this example, select a Server install and press Enter to continue. You'll then behold a screen, as shown in figure 3.6, that offers a choice of partitioning schemes and tools.
Figure 3.6 Select a partitioning scheme or tool.
The Autopartition button will partition your arduous drive according to the nature of selected installation, and automatically configure the partitions for use with Linux. The Disk Druid button will launch a graphical partition editor. The fdisk button will launch the Linux fdisk utility. The fdisk command offers the faculty to create (not format) nearly 60 different types of partitions, but has a text-based interface.
Click the Disk Druid button. If you are using a current arduous drive that hasn't previously been partitioned, you'll breathe asked if you would affection to create current partitions on the drive. Click the Yes button to initialize the drive. If you are using a arduous drive that has been previously partitioned or formatted and the partitions are recognized, Disk Druid will present a graphical interface. figure 3.7 shows a arduous drive with nearly 1.5GB of free space that hasn't been partitioned.
Figure 3.7 Partition your drive before installing Red Hat Linux.
To use Disk Druid, select any listed free space, and then press the current button. To create free space, scroll to an existing partition and use the Delete button to delete the partition. If you use the current button, you'll behold a dialog box as shown in figure 3.8.
The Add Partition dialog box is used to select a arduous drive, allocate a mount point (such as /boot or /), allocate a filesystem (such as ext2, ext3, RAID, swap, or vfat), allocate the size of the partition, and allocate a filesystem check. The size of the partition can breathe fixed, or if you press the spacebar when selecting the Fill complete Available Space field, will use complete remaining free space. The Check for contaminated Blocks item is used to verify low-level formatting (and will rob a long time on a arduous drive with a capacity larger than 1GB). use the OK button when finished.
Figure 3.8 Set partition information about a selected or current partition on a arduous drive.
Red Hat Linux requires at least a root (/) and swap partition. The swap partition should breathe more than twice as big as the amount of installed memory, and perhaps three times as big because of current remembrance requirements of the Linux 2.4–series kernel. figure 3.9 shows a completed partitioning scheme for a server with an initial 1.5GB arduous drive. Note that you can allocate other schemes, such as a remote /home partition, but this can breathe accomplished after installation.
Figure 3.9 Review your partitioning scheme for your arduous drive.
Take a jiffy to review your partitioning scheme. Changes can breathe made by selecting a desired partition, and then using the Edit or Delete button, followed by use of the current button to use any free space. When satisfied, use the OK button to continue the install. You'll then breathe asked (as shown in figure 3.10) to select a boot loader for booting Red Hat Linux, or whether you'd prefer not to use a boot loader (when booting from floppy, a DOS partition, or over a network).
Figure 3.10 Select whether you want to use a boot loader, and if so, which type.
Using GRUB or LILO depends on your exigency for a particular feature, familiarity or preference. The GRUB loader works with complete BSD UNIX variants and many proprietary operating systems. The utility likewise supports menuing, command lines, installed RAM detection, and diskless and remote network booting. On the other hand, LILO has a much longer Linux history and might breathe more confidential to long-time Linux users. Select the desired boot loader, and then use the OK button, and you'll breathe asked where you want to install the boot loader, as shown in figure 3.11.
GRUB and LILO are typically installed in the MBR of the first IDE arduous drive in a PC. However, the boot loader can likewise breathe installed in the first sector of the Linux boot partition. Note that you can likewise backtrack through the install process to change any settings. Select a location and use the OK button to continue. You'll then breathe asked (as shown in figure 3.12) if you'd affection to pass any kernel arguments before booting Linux.
Figure 3.11 Select where you'd affection to install the boot loader.
Figure 3.12 Enter any desired kernel arguments to breathe passed by the boot loader.
Enter the arguments in the dialog box or use the OK button to continue. After you press Enter, you can graphically edit the loader's configuration file to add or remove choices of booting other operating systems. The default operating system to boot will breathe Red Hat Linux, but if you are configuring a dual-boot system, you can configure the boot loader, either now or later on when using Red Hat Linux, to uphold booting another installed operating system residing on a different partition. When finished, click the OK button, and you'll breathe asked to select a firewall configuration, as shown in figure 3.13.
You'll breathe asked to configure network settings if your computer's installed network adapter is recognized by the Red Hat installer. If you install a recognizable network adapter after installation, Red Hat Linux will request during the boot process if you'd affection to configure the adapter. Network adapters can likewise breathe configured by using the netconf command.
Figure 3.13 Selected a desired security level.
Use the dialog box shown in figure 3.13 to set a security level. Although the No firewall setting isn't recommended, this setting can breathe used if you're using Red Hat Linux as a non-networked workstation. The Medium setting might breathe acceptable for use on an intranet protected by a firewall and served by an Internet gateway. Certainly use a lofty security flat if your computer is attached directly to the Internet. Note that you can likewise manually configure security settings after installing Red Hat Linux. use the Customize button to choose allowable services, as shown in figure 3.14.
The dialog box in figure 3.14 should breathe used to set allowable incoming service requests. This is considerable if you want to allow requests immediately following installation and the start of Red Hat Linux. For some servers, HTTP, FTP and Simple Mail Transport Protocol (SMTP) requests are acceptable and reasonable. use the OK button when you finished selecting services. You'll then breathe asked to select any additional languages you'd affection supported by the installed Red Hat Linux system. You'll then behold a Time Zone Selection dialog box, as shown in figure 3.15.
Figure 3.14 Select allowable incoming service requests for your custom security setting.
Figure 3.15 Select your time zone.
There are two "clocks" or times when using a PC: the hardware clock, maintained by chips in the computer and a backup battery; and the system time, set upon booting and used by the Linux kernel. It is considerable to uphold the two times accurate and in synchronization because automated system administration might exigency to rob region at faultfinding times. Many computer installations use computers with hardware clocks set to Greenwich add up to Time (a misnomer because the redress designation is UTC or Coordinated Universal Time). The Linux system time is then set relative to this time and the current time zone, such as Eastern measure Time, which is -5 hours of UTC. Setting the computer's hardware clock to UTC (GMT) has the edge of allowing the Linux system time to breathe easily set relative to the geographic position of the computer and resident time zone. (Such as a Linux laptop user who would affection to create files or route electronic mail with redress time stamps, and who has traveled from current York to Tokyo).
Read the manual page for the hwclock command to learn how to uphold a running Linux system synchronized with a PC's hardware clock.
Choose your time configuration, and then press the OK button. You'll then breathe asked to enter a root operator password. nature in a password, press Enter, and then nature it again to construct certain that it is verified. The password, which is case sensitive, should breathe at least six characters (or more) and consist of letters and numbers. Note that the password isn't echoed back to the display. When finished, use the OK button to continue. You can then create a established user account, as shown in figure 3.16.
Figure 3.16 Create a user account for use with Red Hat Linux.
Create a user account for yourself and any additional users of the system. Users are assigned a username, password, shell, and home directory. The default home directories reside under the /home directory. When finished, use the OK button to continue. You can then add additional users if you created a user for your system. (Even if you use Red Hat Linux on a standalone workstation, you should create a user for yourself, and then use the su or sudo commands to perform root tasks.)
In the Package Group Selection dialog box, shown in figure 3.17, are select software groups, each of which contains many different software packages.
Figure 3.17 Select software package groups for installation.
Use the spacebar to select various groups of software packages. Note that the size of the installed software will dynamically reflect your choices. use the Select Individual Packages item to choose individual software packages. This can allow fine-tuning of the software installation to only installing desired commands or clients, and to prune unwanted software. use the OK button when finished. You'll then breathe asked to configure a video card for the X Window System (if selected for installation) as shown in figure 3.18.
You won't breathe asked to select a video card if you don't install the X software. Note that you can select and choose X software for installation, and then skip the configuration step and configure X for Red Hat Linux after installing. behold Chapter 6, "The X Window System," for details on configuring X to labor with a PC's graphics card. If you select a graphical or text-based install and don't use the Expert mode to install Red Hat Linux, your graphics hardware will breathe automatically probed.
Figure 3.18 Select a video card for use with X11 or skip the configuration.
After X configuration or skipping the configuration, the installer will then format your partitions using your settings. Next, an install image will breathe transferred to the formatted partition for use during the install. The installer will then check your software selection for any package dependencies and initiate copying software from the CD-ROM (or a selected source) onto the current Linux partitions, as shown in figure 3.19.
Figure 3.19 Monitor your installation and packages.
The installer, shown in figure 3.19, reports on the denomination of the current package being installed, the total number of packages, time remaining for the installation, and number of completed and remaining packages. At some point during the installation, you will breathe asked to remove the first CD-ROM and insert the second. When the installation finished, the installer will perform some temporary file cleanup, install the boot loader and then request if you'd affection to create a boot diskette for practicable use later, as shown in figure 3.20.
Figure 3.20 You can create a boot disk for later use.
You can create this reserve disk now, or you can use Red Hat's mkbootdisk command later on while using Red Hat Linux. Select Yes or No. If you choose to create a boot disk, you'll exigency to accommodate a blank diskette on hand. Having a boot disk can breathe handy, especially if the boot loader fails to boot Linux.
After this portion of the install, you're done! Press the OK button and Red Hat Linux will evict any inserted CD-ROM and reboot. If you choose to use the LILO boot loader, you'll then breathe presented with a graphical boot prompt as shown in figure 3.21. (The GRUB boot loader will witness similar.)
If you sequel nothing for five seconds or press Enter, the boot loader will boot Red Hat Linux. To use a text-based boot prompt, press Ctrl+x and press Enter. You'll then behold the boot: prompt if you use LILO. Both LILO and GRUB present the casual to pass any required kernel arguments.
Figure 3.21 Boot Red Hat Linux by pressing the Enter key or waiting five.
SQL Server on Linux is a major step that Microsoft has taken with regards to open community support. This is very useful for SQL administrators who accommodate to labor on heterogeneous OS platforms where Oracle, MySQL, MariaDB, SAP ASE, PostgreSQL, DB2...etc. was the major databases supporting Linux platform was the only choice until now. Companies can now perambulate to SQL Server on a Linux platform seamlessly using the SQL Server Migration assistant from other supported databases and uphold the operating system independent of the database choice.
This article will cover particular installing instructions. It is expected that you understand basic Linux commands and operations and likewise the Linux operating system with RedHat / CentOS 7.2.
Basic installation erudition of SQL Server and Linux
Internet access should breathe open for TCP 443 to download the required packages for installing SQL Server.
TCP port 22 for SSH connections should breathe open.
You exigency at least 3.25GB of remembrance to bustle SQL Server on Linux. The SQL Server Engine has only been tested up to 256GB of remembrance at this time.
SSH to the Linux console can breathe done using putty (https://the.earth.li/~sgtatham/putty/latest/x86/putty.exe). Using putty you can connect to the console as root user or regular user with sudo access
Commands used in this article
GDB - GDB is a package used to debug the programs written in various languages. (Refer to Step 1/2, in the this article for usage details) - More information can breathe institute using this link: https://access.redhat.com/documentation/en-US/Red_Hat_Developer_Toolset/1/html/User_Guide/chap-GDB.html
YUM - YUM is a package in Linux used for installation in this article. (Refer to Step 1/2, in the this article for usage details) - More information can breathe institute using this link: https://access.redhat.com/solutions/9934
CURL - CURL is a package to transfer the data (Refer to Step 3, in this article for usage details) - more information can breathe institute using this link: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Developer_Guide/Installing_cURL.html)
CAT - CAT in short is concatenate and is used to read a file and the output can breathe redirected to a current file or appended. (Refer to Step 3, in the this article for usage details) - More information can breathe institute using this link: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/3/html/Step_by_Step_Guide/s1-navigating-usingcat.html
Installing the dependent packages
The first step is to gdb with the following command:
sudo yum install gdb -y
You can behold the results of this below:
Step 2: install bzip2.
sudo yum install bzip2 -y
Once the dependent packages are installed. Download the repository file (repo file) from Microsoft website. More information about the repo files can breathe institute using this link: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/sec-Configuring_Yum_and_Yum_Repositories.html
Add the repository for SQL Server and Install
The next step is to rep SQL Server with curl:
sudo curl https://packages.microsoft.com/config/rhel/7/mssql-server.repo > /etc/yum.repos.d/mssql-server.repo
This step will download the SQL Server binaries.
Once the reporistory is download and addded. use YUM to install the SQL Server.
sudo yum install -y mssql-server
You will exigency to accept the License and defaults.
Just affection on Windows, SQL Server is now installed (running the installation center). It is now time to accept SQL license, configure SQL Server service to auto bustle and give credntials for sa account.
Accept the License and defaults and add an sa password according to security requirements. Once the installation is completed. Start the SQL Service and set the service option to automatic.
Note: complete the input parameters requirements are marked in RED
Step 6: Check the status of the service :
sudo systemctl status mssql-server
sudo systemctl start mssql-server (Starting SQL Server Service)
sudo systemctl quit mssql-server (Stopping SQL Server Service)
Similar to SQL Server Service install. They exigency to download the repository to Install SQL Server client tools currently limited to sqlcmd and bcp utilities.
sudo curl https://packages.microsoft.com/config/rhel/7/prod.repo > /etc/yum.repos.d/msprod.repo
sudo yum install mssql-tools -y
Add firewall rules exception for PROD and for just testing POC you can likewise quit firewalld service. You can refer to troubleshooting section:
Below is the sqlcmd manual and usage details
sqlcmd -H localhost -U sa
Password <Enter the passsword>
You will notice that complete the default databases has c:\ path before the Linux path however if you use TSQL to restore the database then it uses the absolute path without C:\ prefix. This is a known Issue:
The file browser is restricted to the “C:\” scope, which resolves to /var/opt/mssql/ on Linux. To use other paths, generate scripts of the UI operation and supplant the C:\ paths with Linux paths. Then execute the script manually in SSMS.
Once you accommodate the installation you can use SQL Server Management Studio and connect to the databases created / restored on Linux.
If the installation steps are followed as per the document and there are quiet connection issues. This is due to the firewall configuration. It is a requirment to add the SQL Port, 1433 (default port), to the firewall configuration if firewalld is running. please follow the steps below:
sudo firewall-cmd --zone=public --add-port=1433/tcp --permanent
sudo firewall-cmd --reload
Once the port is added to firewall. Verify that the SQL Server service is listening on the port using the command below:
cat /etc/services | grep 1433
lsof -i | grep ms-sql-s
One other option is to revolve off the firewalld service as below and then the SQL Server port will not breathe blocked. likewise construct certain to disable the auto start of the firewall service upon reboot.
NOTE - This option is not suggested in production environments.
service firewalld stop
systemctl disable firewalld
To re-enable the firewall service and auto start upon reboot. follow the steps below:
service firewalld start
systemctl enable firewalld
Refer to the link below for more details: https://docs.microsoft.com/en-us/sql/linux/
For features that are supported / unsupported in SQL Server 2016 Linux, refer to the link: https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-release-notes
It is considerable to check the Known Issues section in the release notes before posting any bugs to Microsoft.
Hope this helps. If you exigency any further clarification or having exertion in installing SQL Server on Linux. Feel free to email me - firstname.lastname@example.org
Although there are several Linux distributions for Xen, including Oracle Unbreakable Linux and SUSE Linux Enterprise...
Server, you likewise accommodate the option to install XenServer, which is a more comprehensive open source tool.
XenServer is based on Xen, an open source technology created at the University of Cambridge. Xen was adopted by Linux, but the founders of the project likewise created XenServer, which was later purchased by Citrix.
In its current state, XenServer is an open source project, but if you want to bustle a supported version of it, you can purchase it. Citrix offers two options: XenServer measure and XenServer Enterprise. The only contrast between these two is in the flat of uphold Citrix provides. To install either of them, you'll accommodate to download the very ISO file.
Compared to Linux-based Xen stacks, which often lack the commandeer management tooling, Citrix XenServer not only includes the XenServer host itself, but likewise the XenServer console. The XenServer console is a Windows-based client that allows you to manage VMs running on multiple XenServer hosts that are organized in a pool of available resources.
Compared to Linux-based Xen stacks, which often lack the commandeer management tooling, Citrix XenServer not only includes the XenServer host itself, but likewise the XenServer console.
To create a complete setup, proceed to xenserver.org, and download the ISO file to install the hypervisor and the management application available for Windows. If you want to test XenServer, you can download the current version 7.2 for free and install it on any computer that has at least 2 GB of RAM, 46 GB of disk space and a CPU that runs at a minimum of 2 GHz and supports hypervisor extensions. Although this will breathe sufficient to start the installation program and install the software, it won't bring you a smoothly running system, which requires at least double the amount of resources mentioned.
It's relatively simple to install XenServer. Essentially, it's based on the installation program used by older versions of Red Hat Enterprise Linux, but it likewise includes Citrix-specific items. When setting up the host, specify which disk to use and how to address this disk. choose thin provisioning if you want to optimize the host for usage with XenDesktop or accept the defaults if you want to bustle the virtual server manually.
After you install XenServer, you'll rep access to the administration desktop running on the XenServer host. From this desktop, you can manage different parts of the configuration, affection networking, available storage and VMs. However, you won't breathe able to install VMs that will breathe running on the host. To sequel this, you'll exigency a Windows PC with the XenServer management console, likewise known as XenCenter.
Managing virtualization from XenServer console
XenCenter offers a well-organized graphical client for managing XenServer. It allows you to add multiple XenServer installations that will breathe presented as a pool of available resources. On this pool, you can install VMs, as well as other resources, affection the storage that can breathe used by those VMs. The XenCenter management console is available for free, as is the case for XenServer, and it offers an enterprise-level management console that can compete with VMware vCenter.