PowerShell get number of lines of big (large) file

Question

One of the ways to get number of lines from a file is this method in PowerShell:

PS C:\\Users\\Pranav\\Desktop\\PS_Test_Scripts> $a=Get-Content .\\sub.ps1         


        

Answer 1

Use Get-Content -Read $nLinesAtTime to read your file part by part:

$nlines = 0;

# Read file by 1000 lines at a time
gc $YOURFILE -read 1000 | % { $nlines += $_.Length };
[string]::Format("{0} has {1} lines", $YOURFILE, $nlines)

And here is simple, but slow script to validate work on a small file:

gc $YOURFILE | Measure-Object -Line

Answer 2

MS DOS command FIND : $fileName = 'C:\dirname\filename.txt'
CMD /C ('find /v /c "" "' + $fileName + '"')
Other variations on the find command can be found on the docs.