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$ which echo echo: shell built-in command. $ which ls /bin/ls $ which cat /bin/cat Why is echo not an independent utility like ls, ps, cat etc? Why is it shell specific? Any good reasons?
Why is echo a shell built in command? - Unix & Linux Stack Exchange
The echo utility inserts spaces, but only as delimiters between arguments when outputting them: ... The spaces between B and C are preserved as these are part of the same argument to echo.
echo "$ {var}" outputs leading spaces - Unix & Linux Stack Exchange
What output did you expect from echo < file.txt? Input redirection works just fine, it's just that echo doesn't try to read anything from stdin.
How to understand the output of echo $-? It looks like some kind of flag characters. I can't get a clue by googling.
how to understand the output of "echo - Unix & Linux Stack Exchange
Hi Frédéric, the echo is the one complaining. and it happens very frequently. every other loop! My only target here is to trigger the execution of one more loop in the VM. perhaps there is a better solution than a flag file....