Shell to remove a newline char from selected rows in a file.

Shell Programming and Scripting
1

Greetings!

Can we automate the process of removing a newline char from selected rows in a fixed width file using a shell?
Input is like

abcd1234
xyzd1234
abcd
a1b2c3d4
abcd1234
xyzd1234
xx
abcd1234

Expected output -

abcd1234xyzd1234
abcda1b2c3d4abcd1234xyzd1234
xxabcd1234

Note - its like if in above case no of characters in a line -eq 9 (including new line char) remove newline char else not.

Appreciate your help!
Thanks

2

Hi, what have you tried so far?

3

This post is duplicated. There is one identical in UNIX for Dummies Questions & Answers

Regards,
Birei.

4 
echo "abcd1234
xyzd1234
abcd
a1b2c3d4
abcd1234
xyzd1234
xx
abcd1234" | awk '{if(length($1)==8){printf("%s",$1)}else{printf("\n%s",$1)}}'