1

Octave Forges fails to install octave from repositories on Ubuntu 19.04 using snap octave v5.1:

pkg install -forge symbolic
error: get_forge_pkg: could not read URL, please verify internet connection
error: called from
    get_forge_pkg at line 66 column 7
    get_forge_download at line 26 column 14
    pkg at line 407 column 31

I also tried installing the packages from downloaded images:

>> pkg install symbolic-2.8.0.tar.gz
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_TIME = "C",
        LC_MONETARY = "en_US.UTF-8",
        LC_ADDRESS = "en_US.UTF-8",
        LC_TELEPHONE = "en_US.UTF-8",
        LC_NAME = "en_US.UTF-8",
        LC_MEASUREMENT = "en_US.UTF-8",
        LC_IDENTIFICATION = "en_US.UTF-8",
        LC_NUMERIC = "C",
        LC_PAPER = "en_US.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
For information about changes from previous versions of the symbolic package, run 'news symbolic'.

my locale settings

locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=en_US.UTF-8
LC_TIME=en_US.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=en_US.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=en_US.UTF-8
LC_NAME=en_US.UTF-8
LC_ADDRESS=en_US.UTF-8
LC_TELEPHONE=en_US.UTF-8
LC_MEASUREMENT=en_US.UTF-8
LC_IDENTIFICATION=en_US.UTF-8
LC_ALL=

UPDATE

the situation has improved mostly for the better I now use the flatpak app instead of the snap app and everything works fine ( except that I'm still unable to install packages from repositories )

anyway I still face this annoying little issue every time I load Symbolic

syms x
Symbolic pkg v2.8.0: sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
Python communication link active, SymPy v1.3.
  • Try this: sudo locale-gen en_US.UTF-8 – Gunnar Hjalmarsson Oct 9 '19 at 16:53
  • Since you are using a snap, perhaps this is related? Can not install Image acquisition package in Octave – steeldriver Oct 9 '19 at 18:15
  • @GunnarHjalmarsson the situation has changed and quite improved for the better now I'm able to install image packages but I get this annoying issue every time I load Symbolic and use it syms x Symbolic pkg v2.8.0: sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8) sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8) sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8) Python communication link active, SymPy v1.3. – Yousef Saber Oct 9 '19 at 19:47
  • What does the command locale -a output? – Gunnar Hjalmarsson Oct 9 '19 at 19:52
  • @GunnarHjalmarsson locale -a C C.UTF-8 POSIX ar_EG.utf8 de_AT.utf8 de_BE.utf8 de_CH.utf8 de_DE.utf8 de_IT.utf8 de_LI.utf8 de_LU.utf8 en_AG en_AG.utf8 en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IL en_IL.utf8 en_IN en_IN.utf8 en_NG en_NG.utf8 en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US en_US.iso88591 en_US.utf8 en_ZA.utf8 en_ZM en_ZM.utf8 en_ZW.utf8 – Yousef Saber Oct 11 '19 at 15:02
0

UPDATE 2

I fixed the last issue by adding

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

in the file

/etc/default/locale

now it works as it should

>> pkg load symbolic
>> syms s
Symbolic pkg v2.8.0: Python communication link active, SymPy v1.3.

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