golang - install Go in Ubuntu

First, visit the golang website to check for the latest version available:
https://golang.org/dl/

Step 1: Now, we download the latest version:

$ wget https://dl.google.com/go/go1.15.2.linux-amd64.tar.gz
--2018-04-26 13:12:17--  https://dl.google.com/go/go1.10.1.linux-amd64.tar.gz
Resolving dl.google.com (dl.google.com)... 172.217.163.142, 2404:6800:4007:80e::200e
Connecting to dl.google.com (dl.google.com)|172.217.163.142|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 119914627 (114M) [application/octet-stream]
Saving to: go1.10.1.linux-amd64.tar.gz

go1.10.1.linux-amd64.tar.gz               100%[=====================================================================================>] 114.36M  16.1MB/s    in 7.2s    

2018-04-26 13:12:25 (15.8 MB/s) - go1.10.1.linux-amd64.tar.gz saved [119914627/119914627]

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Step 2: Use sha256sum to verify the tarball:

$ sha256sum go1.15.2.linux-amd64.tar.gz 
72d820dec546752e5a8303b33b009079c15c2390ce76d67cf514991646c6127b  go1.10.1.linux-amd64.tar.gz
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Step 3: Compare sha256sum hash with the one on the downloads page:

Step 4: Use tar to extract the tarball:

$ tar xvf go1.15.2.linux-amd64.tar.gz

x - extract

v - verbose output

f - specify a filename

Step 5: Observe that a directory named go is created at the current location:

$ ls -l | grep go

drwxr-xr-x 11 ubuntu ubuntu      4096 Mar 29 10:06 go

-rw-rw-r--  1 ubuntu ubuntu 119914627 Mar 29 20:17 go1.15.2.linux-amd64.tar.gz

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Step 6: Change the ownership of this folder (go) to root:

$ sudo chown root:root go

$ ls -l | grep go

drwxr-xr-x 11 root root      4096 Mar 29 10:06 go

-rw-rw-r--  1 mhc  mhc  119914627 Mar 29 20:17 go1.10.1.linux-amd64.tar.gz

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Step 7 : Move it to the location: /usr/local

$ sudo mv go /usr/local

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Step 8: Setting Go Path:

$ sudo vi ~/.profile 

At the end of this file add the following lines. This tells Go where to look for its files

export GOPATH=$HOME/work

export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin

Step 9: Let us now, refresh our profile by running:

$ which go

$ source ~/.profile

$ which go

/usr/local/go/bin/go

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Reference: https://www.digitalocean.com/community/tutorials/how-to-install-go-1-6-on-ubuntu-16-04