About script writing

[juno2]

I am new comer to use unix to write shell script , could you give me some hints to do that . my situation as below.

The user will generate some .txt files to the system , how can i write a script to change all these .txt to .prn format ?

[Jarle Bjorgeengen · Accepted solution]

Hi,

do you want to change only the name, or do you want to actually change the contents ? If you want to change the contents, I suggest you use perl. And you you need to understand the format of the prn file, which I'm not familiar with.

If prn is a binary file, you need to other tools than shell commands to do the job.

Rgds Jarle

[juno2]

thx reply, it is only plain txt files , and only change the file name , no need to change the content. thx

[Frederic Sevestre]

Hi,

try this :

for FILE in $(find -name "*.txt")
do
mv $FILE $(dirname $FILE )/$(basename $FILE | cut -d. -f1)
done

Regards,
Fr??d??ric

[Jarle Bjorgeengen]

Right,

try this.

#$/bin/sh

for i in $(ls /your_directory_with_txt_files/*.txt)
do
mv $i /your_directory_with_txt_files/$(basename $i .txt).prn
done

Or you could give the directory as an argument to the script, and replace your_directory_with_txt_files with $1

Rgds Jarle

[juno2]

Thx all.

[John Meissner]

scripting is fun (ok... i'm sick but i enjoy it). If you'd like to get some books on it I would recommend.

"Korn Shell Programming by example" by O'Brien, Pitts

&

"sed & awk" by Dougherty & Robbins

for your problem I would write this script:

#! /usr/bin/ksh
for i in $(ls /path/to/files)
do
file=$(echo $i | sed 's/.txt//g')
mv $file $file.txt
done

[ashan]

Hi

If you are new to shell scripting, please buy
this book Hands-On Kronshell93 programming
(ISBN:0-201-31018X other book is Kronshell
Programming Tutorial by Barry Rosenberg

The latest is KSH93 go for it,grate book
by very clear examples.

You can become shell Master.

Good luck

Ashan