Solved

If /path/file1.txt has 0 data replace with /path/genericfile.txt using shell script or perl on a linux box

Posted on 2011-02-21
4
450 Views
Last Modified: 2012-05-11
I'm running a matlab script at it will not create ANY graphics unless ALL of the files contain data. As a result, I need to replace files that occasionally lack to with dummy data so the remaining output graphics can be generated so I need to do this.

If /path/file1.txt has 0 data replace with /path/genericfile.txt using shell script or perl on a linux box
0
Comment
Question by:libertyforall2
  • 2
4 Comments
 
LVL 11

Accepted Solution

by:
Pieter Jordaan earned 250 total points
ID: 34949231
Hi

There are several ways to do that.

The simplest way is to cat the file, and then count the amount of lines.
If it has less than 1 line, then replace it with the contents of the other file.


LINES=`cat /path/file1.txt | wc -l`
if [ "$LINES" -lt 1 ]
   then
   cat /path/genericfile.txt > /path/file1.txt
   fi

Open in new window

0
 
LVL 68

Assisted Solution

by:woolmilkporc
woolmilkporc earned 250 total points
ID: 34949339
Yes, there are several ways.

[ -s /path/file1.txt ] && cp -p /path/file1.txt /path/genericfile.txt

wmp
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 34949349
Sorry of course it's the other way!

[ -s /path/file1.txt ] && cp -p /path/genericfile.txt /path/file1.txt

wmp
0
 

Author Closing Comment

by:libertyforall2
ID: 34975194
Works.
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

Suggested Solutions

Title # Comments Views Activity
Using Grep to Find a file 8 87
Linux Hanging with disable Error Output 4 81
combine multiple lines 2 44
Matching a random pattern with one common character 2 46
Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
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…

863 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

22 Experts available now in Live!

Get 1:1 Help Now