Read More on SQL Server Installation on RHEL

• How to install SQL Server 2017 on RedHat Linux
• How to Install SQL Server on Redhat Linux without Internet – Offline Installation
• Install SQL Tools on RedHat Linux using Internet
• Install SQL Server Agent on RHEL
• Installing SQL tools on RHEL without Internet – Offline Installation

Uninstall SQL Tools on RHEL

As we know sqlcmd and bcp utilities are part of SQL tools so if you want to uninstall these utilities from red hat linux machine you need to uninstall SQL tools package mssql-tools. Follow below steps to uninstall sqlcmd utility from your redhat linux machine.

1- Connect to your RHEL server where SQL tools has been installed and running. Check whether SQL tools are installed on this machine or not by checking sqlcmd or bcp utilities. You can see RedHat Linux is recognizing sqlcmd utility that means SQL tools have been installed on this machine that needs to be uninstalled.

2- We can see sqlcmd utility in above screenshot. Now, we will uninstall SQL tools by running below command.

#Uninstall SQL tools from RHEL
sudo yum remove mssql-tools

You can see the details of SQL tools package that is going to be removed from this machine. We can see mssql-tools package is going to be removed here. Above command will ask us to type y to proceed with the uninstallation of this package mssql-tools and type N to quit this removal.

I entered y to uninstall SQL tools from this machine. This will uninstall both utilities sqlcmd and bcp. You can see SQL tools package mssql-tools has been removed from this machine post entering y in above screenshot.

3- Now, we can check sqlcmd or bcp utility again to validate this uninstallation. I typed sqlcmd as i did in first screenshot and pressed enter. Now we can see red hat linux is not recognizing sqlcmd utility, that means SQL tools have been removed from this machine.

#check sqlcmd utility post SQL tools uninstallation
sqlcmd

Here i have shown step by step process to uninstall SQL Tools sqlcmd and bcp from linux machine.

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SQL tools will be installed using mssql-tools package. The mssql-tools package contains two utilities:

• sqlcmd: Command-line query utility.
• bcp: Bulk import-export utility.

Before going ahead, we need Ubuntu server and SQL Server 2017 running on that instance. If you have no idea about installing Ubuntu server or SQL Server 2017 or creating a virtual machine where you can install Ubuntu and SQL Server then i would recommend you to read below articles.

• How to Create a Virtual Machine.
• How to Install Ubuntu on a virtual machine.

SQL Tools Installation on Ubuntu – ONLINE Method/Using Internet

Installing any package on Ubuntu Linux is straight forward method if our server has internet connection and able to access online repositories. But it becomes painful if your Ubuntu server has no access of internet. Below is the list of articles that you can use to learn offline method of SQL Server Installations on Ubuntu and RHEL.

• Install SQL Server on Ubuntu – Offline Method/Without Internet
• How to install SQL Server Agent on Ubuntu – Offline Method
• Installing SQL Tools on Ubuntu Server using Offline Method/Without Internet
• How to Install SQL Server on Redhat linux – Offline Method

Before moving ahead let’s check whether SQL Server is installed or not on this machine. Run below command to check the SQL Server service.

#Check SQL Tools
sqlcmd

#Check SQL Server Service
systemctl status mssql-server

We can see SQL Server is installed and running fine on this server but SQL tools are not installed because sqlcmd is not throwing any output.

Let’s start with importing public repository GPG keys to install sqlcmd and bcp. Run below curl command to import the keys.

curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -

Now we will register Microsoft Ubuntu repository by running below commands.

curl https://packages.microsoft.com/config/ubuntu/16.04/prod.list | sudo tee /etc/apt/sources.list.d/msprod.list

Next step is to update the source list by running given command.

sudo apt-get update 

Once you execute above command, a series of execution will start and update all source packages.

Once above command will be executed, we will run below command to install SQL tools with required unix package.

sudo apt-get install mssql-tools unixodbc-dev

You can see mssql-tools package is installed in below image.

Now you can go ahead and use sql tools. If you are facing any issue during accessing sqlcmd utility then you need to set path environment variable using below steps. Run below command to set the path environment variables. Ubuntu will not be able to recognize sqlcmd utility unless you set the path environment variable. Ubuntu is able to recognize sqlcmd utility once we set the path environment variables.

#To make sqlcmd/bcp accessible from the bash shell for login sessions, modify your PATH in the ~/.bash_profile file
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile

#To make sqlcmd/bcp accessible from the bash shell for interactive/non-login sessions, modify the PATH in the ~/.bashrc file
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc

You can see, sqlcmd is recognized by ubuntu after setting path environment variable in below image.

Now connect to SQL Server instance using sqlcmd and run a command to validate this installation. I have checked the SQL Server version installed on ubuntu server. You can see the details in below image that SQL Server 2017 is installed on this Ubuntu server. Now we have done with SQL Tools installation on Ubuntu server.

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Before going ahead, we need to have a RedHat Linux server. If you have no idea about installing Linux server or creating a virtual machine where you can install Linux and SQL Server then i would recommend you to read below articles first.

• How to Create a Virtual Machine.
• How to Install RedHat Linux 7.3 on a virtual machine.

If you have installed SQL Server on Red Hat Linux server, you need to install SQL Tools to make database connection locally on the server. Make sure you have internet access on the Linux server where we are going to install SQL Tools. If your server does not have internet connection then you should read attached article about installing SQL Tools on RedHat Linux that are running without Internet.

Install SQL Tools on RHEL

As this Linux machine has internet connection so installing SQL Tools on this Linux machine will be quite easy. Let’s go ahead with the SQL Tools Installation on Red Hat Linux server that are connected to internet. Installation process is quite similar to the installation of SQL Server on Redhat Linux.

Let us first check the SQL Server service to make sure SQL Server is installed on this machine. Run below command to check the service.

#Check SQL Server Services
systemctl status mssql-server

We can see SQL Server is installed on this machine. Now check SQL Tools are installed on this machine or not by running sqlcmd utility. We can see this tool is not installed yet.

Now we will download the Microsoft SQL Tools Redhat repository configuration file by running below command to start the SQL Tools installation.

#Download Microsoft Red Hat repository configuration file
sudo curl -o /etc/yum.repos.d/msprod.repo https://packages.microsoft.com/config/rhel/7/prod.repo

You can see file is downloaded to the given folder location. You can see this in below screenshot.

Run below commands to install SQL Tools along with unixODBC package on this server. We need to install unixODBC because of dependency issue. First update all packages by running below command.

#Run package update.
sudo yum update

Once package update will complete. Run below command to install SQL Tools. Once you execute below command, a series of execution will start and show you the details of package that are going to install.

#Install SQL Tools.
sudo yum install -y mssql-tools unixODBC-devel

After series of execution, setup will ask you to accept the license terms. Type YES to accept the license terms.

I pressed enter button post accepting the license terms, again a series of execution started and SQL tools installation was completed within minutes.

Once SQL Tools will install, you can go ahead and check sqlcmd utility. If your Linux server is not able to recognize SQL Server Tools utilities sqlcmd or bcp we need to set path environment variables. Although, it is optional step but you should run below commands to add /opt/mssql-tools/bin/ to your PATH environment variable.

#Add /opt/mssql-tools/bin/ to your PATH environment variable.
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc

Let us see whether Linux is able to recognize SQL Tool or not in below screenshot. We can see now sqlcmd is throwing output.

Now you can go ahead and connect to your SQL Server instance locally by using sqlcmd tool. You can see i have connected to SQL Server Instance using sqlcmd in below screen.

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Error: MMC could not create the snap-in

I faced this issue during launching SQL Server configuration manager. The error details are given below.

This error generally comes when few components are not properly installed on your machine or few of its binaries or dlls have been removed or corrupted on the server. When you launch the particular program it does not find that binary or dll which resulted into this error.

Solution

There are two solution of this error:

• Repair your SQL Server Installation.
• By Copying Missing or Corrupted binary file/DLL

Repair your SQL Server Installation

First and sure shot solution of this issue is to repair your SQL Server installation. If you are facing this issue on production server then you need proper planning before going to repair. Below are the points you should consider if you are going ahead with repair.

1. Make sure to communicate this with all stakeholders as this activity will require downtime.
2. Once you got the downtime window, make sure to Run Full Backup of all databases.
3. Stop SQL Server Services.
4. Make sure you have SQL Server Setup on the server to run repair task. If you don’t have copy it from your repository.
5. Now rename your data folder to Data_old or something else. We will rename it to protect the actual database files. Data folder is the location where all your database files are placed. If you have kept your data and log files on separate drives, make sure to rename all data folders.
6. Go ahead with Repair. Type appwiz.cpl in run command window. Once Add & Remove Program window will appear, click on your SQL Server program and then select Uninstall/Change. You will get below window to go ahead with Repair task. Click on Repair option to proceed. Make sure you should have SQL Server Full Setup for this repair task. if you don’t have setup on server, copy it from your repository to the server. Follow all steps that will come during repair window.

Once Repair will complete, rename the data folder which was created during repair to Data_new and rename back the older data_old folder which we did in step 5 to data to bring all your databases online. If you will face any issue during bringing databases online, make sure to attach it to bring them online.

Now launch SSMS and check your databases, all databases should online and working fine. Issue will fixed here and you will be able to launch SQL Server Configuration Manager. You can see, i am able to launch SQL Server Configuration Manager successfully in below screenshot.

By Copying Missing DLLs

You can see there is a CLSID code given in the error page/window. A CLSID is a globally unique identifier that identifies a COM class object. Launch windows registry and search this code there. I copy this code and paste it in find window of Windows registry.

Once you will press enter, search will stop at the folder matching with this code. You can see this in below screenshot. The path of this code under CLSID folder is showing in below image.

Now click on subfolders of this code. You can see the required DLL in right side pane along with full path which is used for this program/CLSID.

Now copy this DLL path from right side pane and browse it on your server to find the given DLL. We can see this DLL is missing on the server in below image.

Now we will copy this DLL from another server which is running on same build version or from SQL Server Setup and paste it here on the above given path.

Now close the existing SQL Server Configuration Manager and relaunch it again. Your issue will be fixed and configuration manager will launch.

If you are still facing same issue, you need to launch the Microsoft Management Console and check the SQL Server Configuration Manager. Go to Run and type mmc and press enter to launch Microsoft Management Console. Here you need to launch Add or Remove snap-ins. You can check SQL Server Configuration Manager snap-in from available snap-ins from left side pane and add it to mmc console. Once done, click on ok button to proceed.

Now again launch the SQL Server Configuration Manager. It should work this time, if it is still not working you should follow first option to repair the SQL Server installation to fix this issue.

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Read More:

• Fix Error 1418: The Server Network Address cannot be Reached or does not Exist.
• Fix Error 233: No process is on the other end of the pipe
• Fix SQL Server Network Interfaces Error 28: Server doesn’t support requested protocol

The post How to Fix SQL Server Configuration Manager Issue: MMC could not create the snap-in appeared first on Techyaz.com.

• sqlcmd: Command-line query utility.
• bcp: Bulk import-export utility.

Before going ahead, we need a Ubuntu server and SQL Server 2017 running on that instance. If you have no idea about installing Ubuntu server or SQL Server 2017 or creating a virtual machine where you can install Ubuntu and SQL Server then i would recommend you to read below articles.

• How to Create a Virtual Machine.
• How to Install Ubuntu Linux Server on a virtual machine
• Installing SQL Server 2017 on Ubuntu Server – Offline Installation

SQL Tools Installation on Ubuntu – Offline/Without Internet

Installing any package on Ubuntu Linux is straight forward method if your server has internet connection and able to access online repositories. But it becomes painful if your Ubuntu server has no access of internet. We generally call such installations as offline installation. Microsoft suggests below steps for offline installation of SQL Server Tools on Ubuntu server.

• Download all sql tools related packages. i.e msodbc & mssql-tools
• Move these downloaded packages to your Ubuntu Server.
• Install the copied debian packages on the server.
• Resolve Missing Dependencies, if you get any.
• Set the Path environment Variables for this package.

Now we will follow step by step process with the screenshots that will help readers to understand this process.

Download & Copy SQL Tools Packages to Ubuntu Server

Before moving ahead let’s check whether SQL Server is installed or not on this machine. Run below command to check the SQL Server service.

#Check SQL Server Service
systemctl status mssql-server

We can see SQL Server is installed and running fine on this server. Now you can just type sqlcmd to check sql tool is installed or not. We can see it is not installed yet. As we can see SQL Tools are not installed so next step will package download and installation of that package.

Let’s start with downloading the debian package for SQL Tools. You can download the required SQL Tools debian packages for Ubuntu from the attached link or from Microsoft Repositories. You can download these packages on a machine or PC that is connected to the internet. Below are the list of debian packages which needs to be downloaded to install sql tools.

• msodbcsql_13.1.6.0-1_amd64.deb
• mssql-tools_14.0.5.0-1_amd64.deb

SQL Tools package installation depends on msodbcsql package that must be installed first to avoid any dependency issue. Once package will be downloaded on your local PC, next step is to copy above downloaded packages to the Ubuntu server that are running without internet connection.

You can use any tool, application or method to copy this file from localhost to Ubuntu Linux server. I used WinSCP tool to copy this file from machine where i have downloaded the package to the Ubuntu Linux server. Make sure that there should be connectivity between both machine.

If you have not installed WinSCP yet, download and install it on your PC. Launch WinSCP tool and make a connection to Ubuntu server. I have explained about WinSCP in my last articles, you can follow it to get more details. Once you established the connection, WinSCP will look like below image.

Now we just need to drag the downloaded debian packages from left side pane and drop it to right side pane to copy it to Ubuntu Linux server. Files are copied now and we can see them in both side panes.

You can see SQL Tools packages are copied to location \home\techyaz\ in above screenshot. Now we can connect to Ubuntu server and validate whether files are copied there or not.

Connect to Ubuntu server and check the files. You can run ls -lrt to check the files. Once packages will be copied to ubuntu server, next step is to first install msodbcsql package. Run below command to start the installation.

#Install msodbcsql package
sudo dpkg -i msodbcsql_13.1.6.0-1_amd64.deb

Here we will use dpkg package management system for installation because SQL Tools are debian packages for Ubuntu servers. We can see below dependencies error while executing msodbc package. Now our next step is to fix these dependency issues and then kick off the installation again.

Resolve Dependencies

We can see msodbcsql package depends on unixODBC package so first we need to download, move and install unixODBC package on Ubuntu server.

Resolving dependencies are painful job because every package has some dependencies and you need to download and install all such packages manually if you don’t have internet connection on Ubuntu server. If your Ubuntu server has internet connection, all dependencies will be installed using online repository.

Now let’s download and move unixODBC package to Ubuntu server. We can download all required debian packages from attached link.  We can see unixODBC package has been copied to the server now in below image.

Install this package now.

#Install unixODBC Package.
sudo dpkg -i unixodbc_2.3.1-4.1_amd64.deb

We can see this package has another dependency error. That means UnixODBC package is dependent on given packages i.e. libodbc1 & odbcinst1debian2.

When i downloaded libodbc1 and tried to install it, this package failed because of another dependency.

We can see the dependent package in above image. I downloaded package libltdl7 and installed on Ubuntu server. libltdl7 package got installed successfully without any dependency error.

Once libltdl7 package will be installed, next step is to install all dependencies in reverse order. Here we will install libodbc1 then unixodbc followed by msodbcsql package.

We have seen, there were two dependencies to install unixODBC package. One libodbc1 has been installed. Please perform similar exercise to install another dependency odbcinst1debian2. Once both packages will be installed, go ahead and install unixodbc in order to install msodbcsql package.

If you want to check all dependencies for these packages, you can get it by running below command.

#Check dependencies of both packages.
dpkg -I msodbcsql_13.1.6.0-1_amd64.deb | grep "Depends:"
dpkg -I mssql-tools_14.0.5.0-1_amd64.deb | grep "Depends:"

If you have internet connection on your Ubuntu server then this task will be very easy to perform. You just need to execute below command to install unixodbc package.

#Install unixodbc on Ubuntu if server is connected to Internet.
sudo apt-get -f install unixodbc

SQL Tools Installation

We have resolved all dependencies errors in above section. Now we will install SQL Tools to establish database connection to SQL Server instance from ubuntu server. Run below command to install the msodbcsql package again post resolving dependencies.

#Install msodbcsql Package
sudo dpkg -i msodbcsql_13.1.6.0-1_amd64.deb

Once you will execute above command, you will get below screen to accept the license terms. Choose Yes and press enter button to proceed.

Once you press enter, package execution will start. You can see msodbcsql package is installed successfully now.

Next we will install another package mssql-tools now. Run below command to start the installation.

#Install mssql-tools Package
sudo dpkg -i mssql-tools_14.0.5.0-1_amd64.deb

Again this package will ask you to accept the license terms just like msodbcsql package. Choose yes and press enter to proceed.

You cans see mssql-tools package is installed in below image.

Final step is to set the path environment variables. Run below command to set the path environment variables. Ubuntu will not be able to recognize sqlcmd utility unless you set the path environment variable. You can see that in below screenshot. Ubuntu is able to recognize sqlcmd utility once we set the path environment variables.

#To make sqlcmd/bcp accessible from the bash shell for login sessions, modify your PATH in the ~/.bash_profile file
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile

#To make sqlcmd/bcp accessible from the bash shell for interactive/non-login sessions, modify the PATH in the ~/.bashrc file
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc

Now connect to SQL Server instance using sqlcmd and run a command to validate this installation. I have checked the SQL Server version installed on ubuntu server.

We get above details that SQL Server 2017 is installed on this Ubuntu server by executing sqlcmd utility. Now we have done with SQL Tools installation on Ubuntu server. Go ahead and connect to your Ubuntu server using SQL Tools.

Read more about SQL Server on RedHat Linux:

• How to Create a Virtual Machine.
• Installing RedHat Linux 7.3 on a virtual machine.
• Install SQL Server 2017 on RedHat Linux – Offline Installation.
• How to Install SQL Tools on RedHat Linux – Offline Installation.
• SQL Server Agent Installation on RedHat Linux – Offline Installation.

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