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Redirection to a file is very usefull to append a string as a new line to a file, like
echo "foo" >> file.txt echo "bar" >> file.txt Result:
foo bar But is it also possible to redirect a string to the same line in the file ?
Example:
echo "foo" <redirection-command-for-same-line> file.txt echo "bar" <redirection-command-for-same-line> file.txt Result:
foobar 
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Assuming that the file does not already end in a newline and you simply want to append some more text without adding one, you can use the -n argument, e.g. However, some UNIX systems do not provide this option; if that is the case you can use printf , e.g. Do not print the trailing newline character.
This appending task can be done by using 'echo' and 'tee' commands. Using '>>' with 'echo' command appends a line to a file. Another way is to use 'echo,' pipe(|), and 'tee' commands to add content to a file.
The newline is added by echo, not by the redirection. Just pass the -n switch to echo to suppress it:
echo -n "foo" >> file.txt echo -n "bar" >> file.txt
-ndo not output the trailing newline
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