Hi Jonathan / Hi All, Thank you very much for the very prompt reply and hint. You are right! That was rather a general Ubuntu related question. I'm sorry for that. I took the N.B. on PATH for the rest of my life. Thanks much. Back to the previous topic. The truth is that the directory "/usr/local/gcc-6.3/bin" was already correctly added to PATH after editing ".bashrc". I've just checked it now. How I can see now, the reasons for throwing a "sudo: gcc-6: command not" found output after "sudo gcc-6 --version" command are two fold: (1) the name of the file in that specific folder "usr/local/gcc-6.3/bin" is not "gcc-6" but "gcc-6.3" in my case; (2) with the "sudo" prefix it does not work only without it. cf. below. rawpointer@rawpointer-ubuntu:~$ gcc-6.3 --version gcc-6.3 (GCC) 6.3.0 Copyright (C) 2016 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. rawpointer@rawpointer-ubuntu:~$ sudo gcc-6.3 --version [sudo] password for rawpointer: sudo: gcc-6.3: command not found I think it should be fine now, and I can go to direct MATLAB (which is the only reason why I built the legacy GCC 6.3.0 from source) to pick the path for GCC 6.3.0. Thank you once again. I highly appreciate your support. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, January 27, 2021 4:48 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On Wed, 27 Jan 2021 at 15:45, lordmund via Gcc-help > gcc-help@xxxxxxxxxxx wrote: > > > The GCC 6.3.0 was installed in the below directory of my computer: > > /usr/local/gcc-6.3 > > However, my Ubuntu (terminal) cannot find the path to the recently installed GCC 6.3.0, which I find very interesting why. > > Because you installed it to a directory that isn't in your PATH. This > is normal, and how linux/unix works. > > Either run /usr/local/gcc-6.3/bin/gcc or add /usr/local/gcc-6.3/bin to > your PATH. > > N.B. this is not a GCC question, this is a basic "how do I use > ubuntu?" question.
