Huh? /bin/echo is an executable, all shells should invoke that binary when given a path to it. In bash, echo is a builtin (it appears in the SHELL BUILTIN COM

Huh? /bin/echo is an executable, all shells should invoke that binary when given a path to it. In bash, echo is a builtin (it appears in the SHELL BUILTIN COMMANDS section of the man page between disown and enable). bash$ echo --help # the builtin --help bash$ /bin/echo --help # the executable Usage: /bin/echo [SHORT-OPTION]... [STRING]... or: /bin/echo LONG-OPTION Echo the STRING(s) to standard output. (and a bunch of other GNU help text)