Step 1: Adding PowerShell Repository

As PowerShell is not available on CentOS 7 / 8 operating system, we have to add it from Microsoft repositories by running

curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo

Now, move towards the installation of PowerShell

Step 2: Installing PowerShell on CentOS 7 / 8

Fire the given command to get install PowerShell on RHEL / CentOS 7 / 8.

[sabi@localhost ~]$ sudo yum -y install powershell
 packages-microsoft-com-prod                            297 kB/s | 3.9 MB     00:13    
 Last metadata expiration check: 0:00:09 ago on Fri 27 Dec 2019 01:48:08 PM PKT.
 Dependencies resolved.
  Package        Arch       Version               Repository                       Size
 Installing:
  powershell     x86_64     6.2.3-1.rhel.7        packages-microsoft-com-prod      54 M
 Transaction Summary
 Install  1 Package
 Total download size: 54 M
 Installed size: 54 M
 Downloading Packages:
 powershell-6.2.3-1.rhel.7.x86_64.rpm                   1.1 MB/s |  54 MB     00:47    
 Total                                                  1.1 MB/s |  54 MB     00:47     
 warning: /var/cache/dnf/packages-microsoft-com-prod-687ce8c973efa9d3/packages/powershell-6.2.3-1.rhel.7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID be1229cf: NOKEY
 packages-microsoft-com-prod                            358  B/s | 983  B     00:02    
 Importing GPG key 0xBE1229CF:
  Userid     : "Microsoft (Release signing) gpgsecurity@microsoft.com"
  Fingerprint: BC52 8686 B50D 79E3 39D3 721C EB3E 94AD BE12 29CF
  From       : https://packages.microsoft.com/keys/microsoft.asc
 Key imported successfully
 Running transaction check
 Transaction check succeeded.
 Running transaction test
 Transaction test succeeded.
 Running transaction
   Preparing        :                                                               1/1 
   Installing       : powershell-6.2.3-1.rhel.7.x86_64                              1/1 
   Running scriptlet: powershell-6.2.3-1.rhel.7.x86_64                              1/1 
   Verifying        : powershell-6.2.3-1.rhel.7.x86_64                              1/1 
 Installed:
   powershell-6.2.3-1.rhel.7.x86_64                                                     
 Complete!
 [sabi@localhost ~]$ 

Use the following command to get more information about powershell package.

[sabi@localhost ~]$ rpm -qi powershell
 Name        : powershell
 Version     : 6.2.3
 Release     : 1.rhel.7
 Architecture: x86_64
 Install Date: Fri 27 Dec 2019 01:49:13 PM PKT
 Group       : shells
 Size        : 156967268
 License     : MIT License
 Signature   : RSA/SHA256, Wed 11 Sep 2019 03:16:07 AM PKT, Key ID eb3e94adbe1229cf
 Source RPM  : powershell-6.2.3-1.rhel.7.src.rpm
 Build Date  : Wed 11 Sep 2019 03:11:50 AM PKT
 Build Host  : e7b300f89b4a
 Relocations : / 
 Packager    : PowerShell Team PowerShellTeam@hotmail.com
 Vendor      : Microsoft Corporation
 URL         : https://microsoft.com/powershell
 Summary     : PowerShell is an automation and configuration management platform.
 Description :
 PowerShell is an automation and configuration management platform.
 It consists of a cross-platform command-line shell and associated scripting language.

Step 3: Start and Use PowerShell on CentOS / RHEL 7 / 8

[sabi@localhost ~]$ pwsh
 PowerShell 6.2.3
 Copyright (c) Microsoft Corporation. All rights reserved.
 https://aka.ms/pscore6-docs
 Type 'help' to get help.
 PS /home/sabi> 

Now, try to run few commands to verify our Installation.

PS /home/sabi> pwd
 Path
 /home/sabi
 PS /home/sabi> mkdir /tmp/test
 PS /home/sabi> cd /tmp/test
 PS /tmp/test> pwd
 Path
 /tmp/test
 PS /tmp/test> get-process | more
 NPM(K)    PM(M)      WS(M)     CPU(s)      Id  SI ProcessName
  ------    -----      -----     ------      --  -- -----------
       0     0.00       0.04       0.00    1213 …85 (sd-pam)
       0     0.00       0.04       0.00    2540 …32 (sd-pam)
       0     0.00       0.96       0.15     974 974 accounts-daemon
       0     0.00       0.00       0.00     122   0 acpi_thermal_pm
       0     0.00       0.41       0.00     854 854 alsactl
       0     0.00       0.97       0.02    1993 …93 at-spi-bus-laun
       0     0.00       0.96       0.01    2672 …72 at-spi-bus-laun
       0     0.00       0.00       0.01    2001 …93 at-spi2-registr
       0     0.00       0.44       0.03    2680 …72 at-spi2-registr
       0     0.00       0.00       0.00     407   0 ata_sff
       0     0.00       0.41       0.01    1077 …77 atd
       0     0.00       0.30       0.06     815 815 auditd
       0     0.00       0.75       0.11     850 850 avahi-daemon
       0     0.00       0.03       0.00     950 850 avahi-daemon
       0     0.00       3.57       0.06    4196 …96 bash
       0     0.00       1.38       0.03    2045 …45 boltd
       0     0.00       0.29       0.06     874 873 chronyd
       0     0.00       0.97       0.13    2145 …45 colord
       0     0.00       0.00       0.00      13   0 cpuhp/0
       0     0.00       0.48       0.20    1091 …91 crond
       0     0.00       0.00       0.00      24   0 crypto
       0     0.00       0.79       0.05    1063 …63 cupsd
       0     0.00       3.22       1.81     855 855 dbus-daemon
       0     0.00       0.88       0.20    1602 …02 dbus-daemon
 --More--

That is enough to substantiate our PowerShell functioning on CentOS / RHEL 8. Now you can make use of PowerShell to perform various functions & scripts.

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