Tech.It.2.Me->{By.Anton.Perez} » Scripting

PowerShell: Deleting entire lines in a text file based on a partial string match

anton — Tue, 12 Jul 2011 00:24:11 +0000

PS C:\workspace> (gc “fileToParse.txt”) -notmatch "<criteria>" | out-file
"resultFile.txt"

Note: , for example, “not".

PowerShell: Rename file to lowercase

anton — Wed, 15 Jun 2011 23:14:57 +0000

1. Open PowerShell

2. CD into directory to work on

3. Execute the following command:

get-childitem * -recurse | rename-item -newname { $_.name.ToLower() }

PowerShell: Rename file’s file extension

anton — Wed, 15 Jun 2011 22:58:38 +0000

1. Open PowerShell

2. CD into directory to work on

3. Execute the following command:

get-childitem * -recurse | rename-item -newname { $_.name -replace ".txt",".bcp" }

Read a file with bash

anton — Fri, 17 Aug 2007 01:10:01 +0000

I had to test our download servers at work right away, i.e., HTTP vs HTTPS, which required downloading a large number of files. A file list was given to me to work with, like so:

/download/integrations/file1.exe
/download/us/update/patch/file1.exe
/download/us/cab/file1.exe

So I decided to use the bash shell to read each line and run wget quick and dirty. Here’s the script:

cat c:\\test.txt | while read line; do wget “URL/${line}”; done

While running it I just used the Windows clock to get an approximate time difference.

That’s it! Hope this helps.

VI global search and replace

anton — Fri, 29 Jun 2007 21:52:19 +0000

In case you need to search and replace text globally within vi, here’s the command to do so:

:1,$s/old/new

vi is a free software screen-oriented text editor computer program written by Bill Joy in 1976 for an early BSD release.

Peace! \m/