Powershell command to delete all the lines matching a word from a file.

powershell_delete_line

# PowerShell
Get-Content <sometext_or_log_file> | Where-Object {$_ -notmatch "<exact string>"} | Set-Content <outputfile>

# Example

Get-Content W3000454.log | Where-Object {$_ -notmatch "ping"} | Set-Content c:\log\W3000454_no_ping.log
# The above command will strip all the lines matching the word "ping" and writes to W3000454_no_ping.log

how to write code in Powershell If I want to remove any lines in a text file which contains any of these strings "ping" "pong" "foo"?

Looking for the same. @pradeep14333 did you every find a solution to remove lines that match a list of strings?

array of values can be set for regex. sample for selecting the specific lines that match that array. hope you can appropriately use the below
$regexA = "STRING1"
$regexB = "STRING2"
$filterArray = @($regexA, $regexB)
get-content input-file.txt | select-string -pattern $filterArray | Set-Content output-file.txt

eg input-file.txt:
line1 string1
line2 string2
line3 string3
line4 string4
line5 string1
line6 string2
line7 string3
line8 string4

Output-file.txt:
line1 string1
line2 string2
line5 string1
line6 string2

thanks dude