On Fri 28 Apr 2023 at 20:35:25 (-0400), Greg Wooledge wrote: > On Sat, Apr 29, 2023 at 01:52:11AM +0200, cor...@free.fr wrote: > > $ sudo echo 123 > /root/123.txt > > > > It tells me "permission rejected". > > > > Why this sudo can't get success? > > Because the redirection is done by your shell before sudo is executed. > > See <https://mywiki.wooledge.org/BashPitfalls#pf53> for suggestions, > but basically you're looking at variants of: > > sudo sh -c 'echo 123 > /root/123.txt'
You could also use the construction: $ echo 123 | sudo tee /root/123.txt > /dev/null which has the advantage, when required, that the program producing the output doesn't have to run with root privileges. Cheers, David.
