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Swapping content b/n two files

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# 1  
Old 11-17-2016
Swapping content b/n two files
I am having two files file1&file2.i just want to swap the selected contents btwn two files
#file1
content:
Code:
Title:xxxx
Hello Imran

#file2
content:
Code:
Title:YYYY
Hello Meeran

i just want only second line in both files should be swapped.The title should remain in the same file.

i just want the output like this

file1:
Code:
Title:xxxx
Hello Meeran

file2:
Code:
Title:YYYY
Hello Imran


Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!
Last edited by RudiC; 11-17-2016 at 09:13 AM.. Reason: Added CODE tags.
# 2  
Old 11-17-2016
Hello Meeran Rizvi,

Could you please try following and let me know how it goes then.
Code:
awk 'FNR==NR{S[FNR]=$0} FNR==2 && NR==2{Q=$0;;next} FNR==2 && NR>FNR{S[FNR]=$0;$0=Q;print > ARGV[2]"_tmp";next} NR>FNR{print > ARGV[2]"_tmp"} END{for(i=1;i<=FNR;i++){print S[i] > ARGV[1]"_tmp"}}' Input_file1  Input_file2 && mv Input_file1_tmp Input_file1 && mv Input_file2_tmp Input_file2

Above code will only swap 2nd line of Input_files not any other line as per your request.
EDIT: Adding a non-one liner form of solution on same now.
Code:
awk 'FNR==NR{
                S[FNR]=$0
            }
     FNR==2 && NR==2 {
                        Q=$0;
                        next
                     }
     FNR==2 && NR>FNR{
                        S[FNR]=$0;
                        $0=Q;
                        print > ARGV[2]"_tmp";
                        next
                     }
     NR>FNR          {
                        print > ARGV[2]"_tmp"
                     }
     END             {
                        for(i=1;i<=FNR;i++){
                                                print S[i] > ARGV[1]"_tmp"
                                           }
                                           }
    ' Input_file1  Input_file2 && mv Input_file1_tmp  Input_file1 && mv Input_file2_tmp  Input_file2

Thanks,
R. Singh
Last edited by RavinderSingh13; 11-17-2016 at 08:45 AM..
# 3  
Old 11-17-2016
Pure shell:
Code:
{ read L11; read L12; read L21 <&3; read L22 <&3; echo $L11; echo $L22; echo $L21 >&4; echo $L12 >&4; } <file1 3<file2 4>TMP

For longer files, you may add a tail -n+3 for each file.
This User Gave Thanks to RudiC For This Post:
RavinderSingh13
# 4  
Old 11-18-2016
Hi Rudic,
can u explain me the above code plz.
# 5  
Old 11-18-2016
Code:
{ read L11;                     # from file1 via stdin (fd 0)
  read L12;                     # same
  read L21 <&3;                 # from file2 via redirection (fd 3)
  read L22 <&3;                 # same

  echo $L11;                    # to stdout (fd 1)      (var comes from file1)
  echo $L22;                    # same                  (var comes from file2)
  echo $L21 >&4;                # to redir (fd 4)       (var comes from file2)
  echo $L12 >&4;                # same                  (var comes from file1)

} <file1 3<file2 4>TMP          # redirection for input and to "TMP" file

# 6  
Old 11-18-2016
I tried with tail&sed
its working as expected.
Code:
echo "Enter the file1"
read file1
echo "Enter the file2"
read file2
tail -n+2 $file1 > file3
sed -i '2,$ d' $file1
tail -n+2 $file2 >> $file1
sed -i '2,$ d' $file2
tail -n+1 file3 >> $file2
rm file3

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