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0sudo tee /path/to/file < /dev/null
What do you think?
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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time for i in {1..1000} ; do bash -c "> /tmp/somefile"; donereal 0m10.800s user 0m0.032s sys 0m0.100stime for i in {1..1000} ; do cat /dev/null >/tmp/somefile; donereal 0m9.932s user 0m0.040s sys 0m0.080stime for i in {1..1000} ; do echo -n > /tmp/somefile ; donereal 0m0.010s user 0m0.004s sys 0m0.004stime for i in {1..1000} ; do echo -n > /tmp/somefile ; donereal 0m0.053s user 0m0.027s sys 0m0.025stime for i in {1..1000} ; do > /tmp/somefile; donereal 0m0.048s user 0m0.022s sys 0m0.025s But the command is useful to null a file using sudo, if for example /tmp/somefile was owned by root and you wanted to truncate it without switching to root first.