How to run multiple node versions in a computer?

Solution is to use Node Version Manager (nvm) which helps manage multiple version of node versions.

$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.0/install.sh | bash

To see the list of all available nvm versions,
$ nvm ls-remote

Currently, Node v6.11.1 has the long term support (Latest LTS: Boron). We will setup that first version

$ nvm install 6.11

The above command will install Node.js version 6.11.x (where x will be the last available version number)

To find where the node version is installed, type
$ nvm which 6.11

As of this writing, the latest version available is v8.1.4

$ nvm install 8.1.4

When nvm installs the corresponding npm package also gets installed.

You can switch between different versions of the node by typing

$ nvm use 6.11.1

or

$ nvm use 8.1.4

To list all the available versions of installed node versions, type

$ nvm ls

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How to move the atom editor installable file to a different location?

When Atom editor is installed, it creates a symbolic link in /usr/local/bin folder. Get the new folder path where atom editor installable file resides and run the following command in the terminal

$ ln -s /NewFolder/Atom.app/Contents/Resources/app/atom.sh /usr/local/bin/atom

If a link is already created for the atom editor, then you need to remove the existing symbolic link before creating a new one

$ unlink AtomSymbolicLink (OR)

$ rm AtomSymbolicLink

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How to open a file in Atom editor from a Mac terminal?

When atom installs, it sets up a symbolic link to the location where it is installed. You can open a file or folder in atom by using the following commands

a) Open the editor

$ atom

b) Open a file

$ atom index.html

c) Open atom in the current folder

$ atom .

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Git: Reset local branch to make it the same as remote branch master

Go to your local repository in bash

$ git fetch origin

$ git reset –hard origin/master

To clean and remove untracked files and directories

$ git clean -fdx

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Git: How to reset Develop branch to be in sync with Master branch?

First checkout Develop branch

$ git checkout dev

Then, reset it to Master branch
$ git reset –hard master

Make sure to push the changes by force to make origin/dev to be the same as origin/master
$ git push –force origin develop

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Git error: src refspec master does not match any

Point 1) Check if you have followed the below sequence of steps when setting up git in your local workstation

$ git init

$ git add .

$ git commit -am “name of the commit”

$ git remote add origin https://github.com/username/repository.git

$ git push -u origin master

Point 2) Check if .git/config file has the following parameters in it

[branch “master”]

remote = origin

merge = refs/heads/master

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Python PIP install: Insecure platform warning

Normally, installing a python module and its dependencies is done via Pip. If HTTPS is blocked in private networks, then things might get tricky and you get the following message.

InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail.

To bypass this, you can issue the below command to trust pypi.python.org

$ pip install –trusted-host pypi.python.org Flask

To make sure that the needed module is installed, check it by

$ pip freeze

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Git: error: RPC failed; curl 55 SSL_write() returned SYSCALL,

Git uses “Transfer-encoding” in POST requests and some proxy servers do not support this encoding by default. When large files are pushed, the git client requires higher http.postBuffer setting.

Increase the buffer size to see if the issue is related to it.

$ git config –global http.postBuffer 134217728

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Git: SSL certificate problem: unable to get local issuer certificate

You get this message when the system is behind a firewall and when the security certificates are blocked.

There are two ways to overcome this message and to enable a git pull or git clone.

i) Issue the below command from git bash

$ git config –global http.sslVerify false

OR

ii) Add http block in “gitconfig” file to avoid ssl verification

[http] sslVerify = false
sslCAinfo = /bin/curl-ca-bundle.crt

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Kilobytes to Bytes to Mega Bytes

A useful online calculator to do the size calculation

whatsabyte.com Byte Converter

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