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Principal author: Matt Penny
This e-book is intended as a 'Quick Start' guide to PowerShell for people who already know Bash or one of the other Unix shells.
The book has 3 elements:
an introductory chapter which covers some PowerShell concepts
a summary list of PowerShell equivalents of Unix commands in one e-book chapter
a detailed discussion of Powershell equivalents of Unix commands, organised in the alphabetical order of the unix command
This guide is released under the Creative Commons Attribution-NoDerivs 3.0 Unported License. The authors encourage you to redistribute this file as widely as possible, but ask that you do not modify the document.
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The Powershell equivalent of typing alias at the bash prompt is:
get-aliasAt it's simplest, the powershell equivalent of the unix 'alias' when it's usedto set an alias is 'set-alias'
set-alias ss select-stringHowever, there's a slight wrinkle....
In unix, you can do this
alias bdump="cd /u01/app/oracle/admin/$ORACLE_SID/bdump/"If you try doing this in Powershell, it doesn't work so well. If you do this:
set-alias cdtemp "cd c:\temp"cdtemp...then you get this error:
cdtemp : The term 'cd c:\temp' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.At line:1 char:1+ cdtemp+ ~~~~~~ + CategoryInfo : ObjectNotFound: (cd c:\temp:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundExceptionA way around this is to create a function instead:
remove-item -path alias:cdtempfunction cdtemp {cd c:\temp}You can then create an alias for the function:
set-alias cdt cdtempapropos is one of my favourite bash commands, not so much for what it does...but because I like the word 'apropos'.
I'm not sure it exists on all flavours of *nix, but in bash apropos returns a list of all the man pages which have something to do with what you're searching for. If apropos isn't implemented on your system you can use man -k instead.
Anyway on bash, if you type:
apropos process...then you get:
AF_LOCAL [unix] (7) - Sockets for local interprocess communicationAF_UNIX [unix] (7) - Sockets for local interprocess communicationApache2::Process (3pm) - Perl API for Apache process recordBSD::Resource (3pm) - BSD process resource limit and priority functionsCPU_CLR [sched_setaffinity] (2) - set and get a process's CPU affinity maskCPU_ISSET [sched_setaffinity] (2) - set and get a process's CPU affinity maskCPU_SET [sched_setaffinity] (2) - set and get a process's CPU affinity maskCPU_ZERO [sched_setaffinity] (2) - set and get a process's CPU affinity maskGConf2 (rpm) - A process-transparent configuration systemThe Powershell equivalent of apropos or man -k is simply get-help
get-help processName Category Module Synopsis---- -------- ------ --------get-dbprocesses Function Get processes for a particul...show-dbprocesses Function Show processes for a particu...Debug-Process Cmdlet Microso... Debugs one or more processes...Get-Process Cmdlet Microso... Gets the processes that are ...This is quite a nice feature of PowerShell compared to Bash. If get-help in Powershell shell scores a 'direct hit' (i.e. you type something like get-help debug-process) it will show you the help for that particular function. If you type something more vague, it will show you a list of all the help pages you might be interested in.
By contrast if you typed man process at the Bash prompt, you'd just get
No manual entry for processA rough PowerShell equivalent for the unix basename is:
dir | select nameThis depends on the file actually existing, whereas basename doesn't care.
A more precise (but perhaps less concise) alternative[1] is:
[System.IO.Path]::GetFileName('c:\temp\double_winners.txt')
Notes[1] I found [System.IO.Path]::GetFileName after reading Power Tips of the Day - Useful Path Manipulations Shortcuts, which has some other useful commands
There's no one-liner equivalent for the Linux cal, but there's a useful script, with much of the cal functionality here :
http://www.vistax64.com/powershell/17834-unix-cal-command.html
The PowerShell equivalent of cd is:
Set-Location...although there is a builtin PowerShell alias cd which points at set-location
cd ~ moves you to your home folder in both unix and Powershell.
The unix clear command clears your screen. The Powershell equivalent to the unix clear is
clear-hostPowerShell also has built-in alias clear for clear-host.
However, it's possibly worth noting that the behaviour of the two commands is slightly different between the two environments.
In my Linux environment, running putty, clear gives you a blank screen by effectively scrolling everything up, which means you can scroll it all back down.
The Powershell Clear-host on the other hand seems to wipe the previous output (actually in the same way that cmd's cls command does....). This could be quite a significant difference, depending on what you want to clear and why!
The Posh version of cp is
copy-itemThe following are built-in aliases for copy-item:
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