A Linux Puzzle using tr command

[Brief-Wishbone9091]

cat greeting
 hello

cat greeting | tr -d "\r"
hello world

Create a file called greeting so that you can generate the expected output as shown in second case.

 

[MikeRocor]

cat greeting
 hello

cat greeting | tr -d "\r"
hello world

Create a file called greeting so that you can generate the expected output as shown in second case.

echo "hello world" >/tmp/greeting
cat /tmp/greeting |tr -d "\r"
hello world

But I feel like I'm missing something... since a system using unix-style newlines doesn't produce carriage returns without them being explicitly included, the pipe into the "tr" command doesn't really have anything to do...

cat /tmp/greeting
hello world