get data from input file and write another file

Shell Programming and Scripting
1

Hi,
i have doubt in read and write using bash shell script...
i will give the input file path and output file path in command line
ex : example.sh iputfile outpilepath

Here i need to read the input data then write that data to output file..

please give some example :

2

You can use the following code.
Give the command line argument like : script_name.sh file1 file2

infile=$1
outfile=$2
while read line
do
        echo $line >> "$outfile"
done < "$infile"

Now it will read the file1 contents and writes to file2

3

need one more help...

if input has 3 lines
example :

  1. name1 aa bb cc
  2. name2 aa ff dd
  3. name3 ii kk lll

command :
example.sh inputfile outputfile searchdata

searchdata is name2 means

i want to write the 2nd line only to output file...

4

Don't post your home works here , try to do by your self .If there is any problem you can ask here .

5 
infile=$1
outfile=$2
search_file=$3
count=1
while read line
do
        echo "$line" >> "$outfile"
        if [ $count -eq 2 ]
        then
                echo $line >> "$search_file"
        fi
        let count=count+1
done < "$infile"

I have made the changes as marked above.
Now it will write only the second line to the outfile

6

Ask your home work question here Homework & Coursework Questions - The UNIX and Linux Forums

7 
 
infile=$1
outfile=$2
new=$3;
var=0;
while read line
do
     let var=var+1
     if [ $var -eq 2 ]
     then
       echo $line >> "$new";
     fi
        echo $line >> "$outfile"
done < "$infile"