gsf
Reputation: 7232
add prefix to every line when print to output with tee
I have command like this
command | tee /dev/tty | grep ...
that say prints
hello
world
I would like to change this so every line from the command output to be prefixed, in the output or it to looks, say:
# hello
# world
Upvotes: 6
Views: 2664
Answers (1)
iruvar
Reputation: 23364
bash Process substitution might help
printf 'hello\nworld\n' | tee >(awk '{print "#"$0}' > /dev/tty) | grep hello
hello
#hello
#world
Upvotes: 6
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