PowerShell@HungYuWu

重點整理自Let's do a deep drill into Select-String by Jeffrey Snover , Windows PowerShell/MMC Architect

• $c="a"
  get-alias ($c+"*")   #參數有變數 則用()包住  ; 等於get-alias a*
• Select-String accepts arrays of wildcards to specify Files
• select-string  欲搜尋字串  欲搜尋之檔案路徑(可為wildcard)
• select-string  drive *  #搜尋目前路徑下所有檔案中包含*drive*的字串(預設視為前後加*)
• 被搜尋到的對象不能為資料夾???
• select-string  drive  [a-m]* #搜尋名為a-m開頭的檔案
• select-string  drive  drive g*,r* #搜尋名為g,r開頭的檔案
• Select-String accepts arrays of regular expressions to specify STRINGS
• 欲搜尋字串可為regular expression
• " [a-r]dr" *
• " [a-r]dr|mount"
• " [a-n]dr"," [m-z]dr"
• 若不想讓搜尋字串被視為regular expression 則要指定 -SimpleMatch
• Select-String accepts –Include and –Exclude to tweak which files it operates on
• 欲搜尋檔案可利用–Include 包含某檔案
• 欲搜尋檔案可利用–Exclude 排除某檔案
• These parameters take a wildcard expression or set of wildcard expressions and operate AFTER the filepath is resolved
• -exclude *[mn]-al*   #完整檔案路徑中(不只是檔名)不包含*[mn]-al*
• -exclude [mn]-al*    #完整檔案路徑中不包含[mn]-al*
• You can pipe anything that produces FileInfo objects into Select-String
• 欲搜尋之檔案可由pipeline餵近來
• dir [g-r]* |select-string  drive 
• ([System.IO.DirectoryInfo]"c:\sstest").GetFileSystemInfos() |  select-string  drive
• You can pipe anything that produces MatchInfo objects into Select-String
• select-string get *|select-string item
• Select-String outputs MatchInfo objects not Strings
• Microsoft.PowerShell.Commands.MatchInfo
• select-string  "stop","new.*ve" *|Format-List *
• select-string  "stop","new.*ve" *|group Pattern
• Sometimes you just want the first match in a file
• select-string item r* -list