[utahdave@dasalt salt (develop u=)]$ cat /tmp/test.txt

[utahdave@dasalt salt (develop u=)]$ sudo salt \* file.append /tmp/test.txt 'test: test'
utahdave:
    Wrote 1 lines to "/tmp/test.txt"
[utahdave@dasalt salt (develop u=)]$ cat /tmp/test.txt

test: test
[utahdave@dasalt salt (develop u=)]