Similarly, to not overwrite an existing file when doing output redirection, there is bash's noclobber option. https://www.google.co.in/search?q=bash+set+noclob

Similarly, to not overwrite an existing file when doing output redirection, there is bash's noclobber option. https://www.google.co.in/search?q=bash+set+noclobber https://www.google.co.in/search?q=bash+set+noclobber