Bash: add string to the end of the file without line break

Question

How can I add string to the end of the file without line break?

for example if i\'m using >> it will add to the end of the file with line break:

cat list         


        

Answer 1

Just use printf instead, since it does not print the new line as default:

printf "final line" >> file

Test

Let's create a file and then add an extra line without a trailing new line. Note I use cat -vet to see the new lines.

$ seq 2 > file
$ cat -vet file
1$
2$
$ printf "the end" >> file
$ cat -vet file
1$
2$
the end