Solved

how to empty a file with DOS shell or Perl

Posted on 2009-07-04
5
322 Views
Last Modified: 2012-05-07
In Unix, empty a file with
touch file.txt
or
> file.txt
In DOS or Perl, is anything similar I can use? For example,
07/04/2009  06:20 PM             2,945 file.txt
Want it to be
07/04/2009  06:22 PM             0 file.txt
0
Comment
Question by:jl66
5 Comments
 
LVL 9

Assisted Solution

by:ghostdog74
ghostdog74 earned 30 total points
ID: 24778910
perldoc -f truncate.

please read the Perl documentation, perldoc perlopentut (as well as others) for more info.
0
 
LVL 84

Assisted Solution

by:ozo
ozo earned 190 total points
ID: 24778922
perl -e1 > file.txt
0
 
LVL 10

Accepted Solution

by:
jfromanski earned 200 total points
ID: 24778983
in DOS
ECHO ON > file.txt
0
 
LVL 48

Assisted Solution

by:Tintin
Tintin earned 80 total points
ID: 24778984
touch file.txt

does not empty a file.

By DOS, I'm assuming you mean Windows command shell.  You can do

TYPE >file.txt

it will give you an error, but it will empty the file.

0
 
LVL 68

Expert Comment

by:Qlemo
ID: 24779190
The traditional DOS way is
copy nul file.txt

No error, no contents.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
One of my most closely kept secrets is revealed in this discussion How to output text on the same line This question was recently posted in EE by Simon336697 (http://www.experts-exchange.com/Programming/Languages/Scripting/Shell/Batch/Q_2459…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now