append to end of file
129661
Open existing file, append a single line
11563
Appending to range function
127061
Create  and append  dynamically
36024
Changing Date format and appending to original file
127314
How to insert the content of a file into another file before a pattern (marker)?
19781
replacing and adding at the end of lines with one line sed command
90072
What is the easiest way to add a string on the beginning of every line of the file from the command line?
98668
Bash: append text to last line of file
146211
How to append a line in a zipped file without unzipping?
80707
Log file extract data and append back same line
148554
Add a new line to the end of a JtextArea
136041
How to fix “No newline at end of file” warning for lots of files?
156623
How to detect end of line with sed
66099
How to keep overwriting the contents of a file instead of appending to it
93057
Append string to another string after a specified character
56806
on append() do something
33763
How to add a line to the end of a file which I can access via sudo?