powershell基础
- Windows PowerShell (Figure 1)
- Windows PowerShell ISE (Figure 2)
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| <command -name > -< Required Parameter Name > <Required Parameter Value >
[ -< Optional Parameter Name > <Optional Parameter Value >]
[ -< Optional Switch Parameters >]
[ -< Optional Parameter Name >] <Required Parameter Value >
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帮助
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| help help
help verb-noun
man verb-noun
help about
help about_for
help about_foreach
help about_if
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常用函数
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| get-alias
clear-host cls, clear
format-list fl
get-childitem gci, ls, dir
get-content gc, cat, type
get-location gl, pwd
get-member gm
remove-item ri, rm, rmdir, del, erase, rd
write-output write, echo
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数据类型
- integers
- doubles
- strings
- arrays
- hash tables
- objects
- processes
- services
- event logs
- computers
- XML
- anything else…
Powershell 环境
Within a shell the environment is the term to describe the current settings.
These settings are exposed in environment variables
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| (get-item $env:\username).value
$env:username
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语法要点
Windows不区分大小写
PowerShell casts the result based on the first variable type.
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| PS M:\> [ string ] $a="4"
PS M:\> [ int] $b =7
PS M:\> $a+$b
47
PS M:\> $b+$a
11
PS M:\>
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- arrays
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| PS M:\> $city =(" Edinburgh "," Glasgow "," Dundee "," Aberdeen ")
PS M:\> $city [3]
Aberdeen
PS M:\> ( $city ). Length
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- hash tables
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| PS M:\> $pops =@{" Glasgow " =976970; " Edinburgh " =488610;
>> " Aberdeen " =209460; " Dundee " =157690}
>>
PS M:\> $pops
Name Value
---- -----
Edinburgh 488610
Glasgow 976970
Dundee 157690
Aberdeen 209460
PS M:\> $pops.Values | Measure-Object -average |gm
PS M:\> ($pops.Values | Measure-Object -average ).Average
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