Removing Haskell Platform

Kenneth_Ogden · 15 March 2016 05:02

I installed the Haskell platform then had some problems. The main issue was that I would get the following error message whenever I would start terminal:

Error: 0: couldn’t open source file <ghc-7.10.3>
ghc-7.10.3: No such file or directory
bash: warning: here-document at line 119 delimited by end-of-file (wanted `EOF’)

I have removed it from my laptop, but I’m still getting the error message in terminal. What should I do?

wolfman · 15 March 2016 06:02

Hi,

did you use this PPA?:

https://www.haskell.org/downloads/linux

Have you checked in your /home folder for hidden files (press Ctrl + h to show hidden files) and then remove (delete) the .haskell folder?.

Kenneth_Ogden · 15 March 2016 16:56

I honestly don’t remember using PPA. I checked as you suggested and the .haskell folder was not in my home folder.

wolfman · 16 March 2016 07:02

Hi Kenneth,

well all I can really suggest is you try that PPA I mentioned and see if it helps as I don’t have the app installed myself!.

Kenneth_Ogden · 16 March 2016 15:44

How do I get terminal to download and install that PPA?

wolfman · 16 March 2016 16:03

Hi Kenneth,

open a terminal with Ctrl + Alt + t and paste the following lines one after the other pressing “Enter” after each paste:

UbuntuSteps to setup ghc and cabal:

sudo apt-get update

sudo apt-get install -y software-properties-common

sudo add-apt-repository -y ppa:hvr/ghc

sudo apt-get update

sudo apt-get install -y cabal-install-1.22 ghc-7.10.3

cat >> ~/.bashrc <<EOF

export PATH="\$HOME/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:\$PATH"

EOF

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:$PATH

Then go here and add the version you require pasting the apporiate command for your Ubuntu version in the terminal:

github.com

commercialhaskell/stack/blob/master/doc/install_and_upgrade.md#ubuntu

<div class="hidden-warning"><a href="https://docs.haskellstack.org/"><img src="https://rawgit.com/commercialhaskell/stack/master/doc/img/hidden-warning.svg"></a></div>

# Install/upgrade

For common Un\*x operating systems (including macOS), all you need to do is run:

    curl -sSL https://get.haskellstack.org/ | sh

or:

    wget -qO- https://get.haskellstack.org/ | sh

Distribution packages are available for [Ubuntu](#ubuntu), [Debian](#debian),
[Fedora](#fedora),
[Arch Linux](#arch-linux) and [FreeBSD](#freebsd).
Binaries for other operating systems are listed below, and available on
[the GitHub release page](https://github.com/fpco/stack/releases). For the
future, we are open to supporting more OSes (to request one, please
[submit an issue](https://github.com/commercialhaskell/stack/issues/new)).

This file has been truncated. show original

As far as I can tell the commands above are all correct?, I took them from here:

https://www.haskell.org/downloads/linux

Kenneth_Ogden · 16 March 2016 17:03

I tried the PPA and I’m still getting that error message when I start the terminal. Thanks for your help anyway.

Kenneth_Ogden · 22 March 2016 21:06

Okay! Now I’m getting this error message:

Error: 0: couldn’t open source file <ghc-7.10.3>
ghc-7.10.3: No such file or directory
bash: warning: here-document at line 119 delimited by end-of-file (wanted `EOF’)
bash: fork: Cannot allocate memory

I’ve tried to remove it and it’s dependencies, I even tried to purge it and it’s dependencies, but all I get is the following message:

bash: fork: Cannot allocate memory

Now what do I do?

wolfman · 23 March 2016 06:50

Having looked at the commands from the website again, I think this line might be correct now (I did tell you to enter them all as single commands so my fault there, sorry!):

export PATH="\$HOME/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:\$PATH" EOF

So try running the other commands like so:

sudo apt-get update

sudo apt-get install -y software-properties-common

sudo add-apt-repository -y ppa:hvr/ghc

sudo apt-get update

sudo apt-get install -y cabal-install-1.22 ghc-7.10.3

cat >> ~/.bashrc <<EOF

export PATH="\$HOME/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:\$PATH" EOF

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:$PATH

Kenneth_Ogden · 25 March 2016 20:43

Every time I tried to enter a sudo command, terminal would always give the exact same response:

bash: fork: Cannot allocate memory

The rest seemed to have no effect. I appreciate the help though.

At this point, I’m seriously considering doing a complete reinstall when Ubuntu 16.04 LTS comes out. Maybe even trying a different distro. What do you think?

wolfman · 26 March 2016 07:30

Try UM 16.04 Beta 2, it is up and running fine on my rig after a complete fresh install!.

Kenneth_Ogden · 27 March 2016 01:57

How would I get it to format the hard drive and do a full installation instead of just upgrading. I’m afraid that if it simply upgrades, I might be stuck with the same issue.

wolfman · 27 March 2016 06:26

Hi Kenneth,

use the “Something Else” method and format both your “root” and “home” partitions instead of only root, it can be that simple:

If you want to know more about partitioning; go here:

Stacks of info here too if you feel the need to start from the beginning!:

Kenneth_Ogden · 27 March 2016 18:36

Thanks for your help. I really appreciate it.

wolfman · 28 March 2016 06:05

My pleasure Kenneth, it’s on forums like this one that I learned how to do things and I’m just trying to pass on what I think works well for me!.

Kenneth_Ogden · 28 March 2016 21:42

And I’m very grateful for your help. I’m glad that there’s someone out there that’s willing share expertise with a newbie. In many cases, I’ve either been given the brush off or just felt ignored.

wolfman · 29 March 2016 05:59

Hi Kenneth,

often the written word can cause more damage than the spoken!. Don’t give up and once you have re-installed at least 100 times; you’ll be able to do it blindfold!.