how to remove New line character using Sed or perl
123412
How to remove newline character between two strings \n in unix?
77179
Replace comma with newline in sed on MacOS?
143143
sed fails to remove newline character
134655
How to edit next line after pattern using sed?
124318
Is there a faster way to remove a line (given a line number) from a file?
104310
How to only substitute lines that match several patterns in sed?
81900
remove lines where a field's value is less than or equal to 3 - sed or awk?
78766
How can I replace end line with fixed text when the next line begins with a defined set of characters?
94529
Using 'sed' to find and replace
45463
How do I replace all line breaks in a string with  elements?
124920
sed one-liner to delete everything between a pair of brackets?
67109
Remove last character from line
123869
Reliably Remove Newlines From String
30328
How do I change, delete, or insert a line in a file, or append to the beginning of a file in Perl?
19678
Insert a new line without \newline command
124497
remove lines that contain a specific text in a file
100478
How can I exclude the lines which matche the range patterns in sed?