PowerShell on Linux
[Pages:40]WMLUG January 2017
PowerShell on Linux
Patrick TenHoopen
PowerShell on Linux
On August 18, 2016, Microsoft announced that it would make PowerShell open source and release it for Linux and Mac OS using one code base under the MIT license. It is still in an alpha stage though.
Why Run PowerShell on Linux?
Language is easily readable and is selfdocumenting
Optimized for structured data Good at "gluing" systems together Provides an interactive shell as well as being
scriptable
Comparing PowerShell to Bash
Command Input/Output Piping Bash uses text while PowerShell uses objects (does require that you know the object methods and properties). PowerShell doesn't support input redirection. Available Commands Bash has ~150 built-in commands and helper functions (less to learn) compared to PowerShell's 300+ (on Windows) methods and cmdlets. Windows System Integration PowerShell has many cmdlets written for administering Microsoft products while bash has none. Integrated Scripting Environment (ISE) PowerShell on Windows provides an integrated scripting environment.
PowerShell's Use of Objects
The output of a PowerShell command is an object. The object can be passed to the next command (object pipeline) for input.
Running on Linux
Not all of PowerShell's features work on Linux like in Windows due to bugs and the difference in frameworks (.NET Core on Linux vs full .NET on Windows). Some examples of issues: Remote management is not available Case-sensitivity of file names Aliases were removed for native commands (ls, cp,
etc.) so the native commands are used but they return text rather than objects
Running on Linux
Output from native commands is sent in total after command is done rather than as it is generated
Redirected output contains the UTF-8 byte order mark (BOM) unless ASCII encoding is specified
Job control doesn't work Doesn't do wildcard expansion (globbing) for the
native commands but does for built-in/internal commands
Installation
Supported distros: Ubuntu 16.04, Ubuntu 14.04, CentOS 7, Red Hat Enterprise Linux 7
Installing on Ubuntu 16.04:
sudo apt-get install libunwind8 libicu55 sudo dpkg -i /path/to/powershell_6.0.0-alpha.141ubuntu1.16.04.1_amd64.deb
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