Did you find any solution?

fatal: could not create work tree dir 'fabric-samples': Permission denied

Seems that your current user does not have write access to your current directory. Try to run curl command with sudo:

sudo curl -sSL http://bit.ly/2ysbOFE | bash -s -- 1.4.7 1.4.7 0.4.20

Another option is to switch to the directory in which write operations are allowed without sudo access

If it doesn't work for some, try this: sudo chmod 777 ~/go/src/github.com/hyperledger before executing the above command.

**Friends... I need help on the below. I tried with and without sudo and also substituted with the un-shortened URL: **
curl -sSL http://bit.ly/2ysbOFE | bash -s
sudo curl -sSL http://bit.ly/2ysbOFE | bash -s -- 1.4.7 1.4.7 0.4.20

https://raw.githubusercontent.com/hyperledger/fabric/master/scripts/bootstrap.sh

sudo curl -sSL https://raw.githubusercontent.com/hyperledger/fabric/master/scripts/bootstrap.sh | bash

ubuntu: /c/workspace/fabric-samples/first-network$ sudo curl -sSL http://bit.ly/2ysbOFE | bash -s -- 1.4.7 1.4.7 0.4.20

Clone hyperledger/fabric-samples repo

===> Cloning hyperledger/fabric-samples repo
fatal: could not create work tree dir 'fabric-samples': Permission denied
fabric-samples v1.4.7 does not exist, defaulting master
fatal: Unable to create '/c/workspace/fabric-samples/.git/index.lock': Permission denied

Pull Hyperledger Fabric binaries

===> Downloading version 1.4.7 platform specific fabric binaries
===> Downloading: https://github.com/hyperledger/fabric/releases/download/v1.4.7/hyperledger-fabric-linux-amd64-1.4.7.tar.gz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 649 100 649 0 0 732 0 --:--:-- --:--:-- --:--:-- 731
0 79.3M 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0tar: bin: Cannot mkdir: Permission denied
tar: bin: Cannot mkdir: Permission denied
5 79.3M 5 4739k 0 0 1075k 0 0:01:15 0:00:04 0:01:11 1543ktar: bin/idemixgen: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
21 79.3M 21 16.9M 0 0 2090k 0 0:00:38 0:00:08 0:00:30 3010ktar: bin/discover: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
33 79.3M 33 26.7M 0 0 2656k 0 0:00:30 0:00:10 0:00:20 4106ktar: bin/configtxgen: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
41 79.3M 41 32.5M 0 0 2945k 0 0:00:27 0:00:11 0:00:16 4579ktar: bin/configtxlator: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
63 79.3M 63 50.5M 0 0 3614k 0 0:00:22 0:00:14 0:00:08 5922ktar: bin/orderer: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
71 79.3M 71 56.5M 0 0 3780k 0 0:00:21 0:00:15 0:00:06 6100ktar: bin/cryptogen: Cannot open: No such file or directory
tar: bin: Cannot mkdir: Permission denied
100 79.3M 100 79.3M 0 0 4265k 0 0:00:19 0:00:19 --:--:-- 6240k
tar: bin/peer: Cannot open: No such file or directory
tar: config: Cannot mkdir: Permission denied
tar: config: Cannot mkdir: Permission denied
tar: config/core.yaml: Cannot open: No such file or directory
tar: config: Cannot mkdir: Permission denied
tar: config/configtx.yaml: Cannot open: No such file or directory
tar: config: Cannot mkdir: Permission denied
tar: config/orderer.yaml: Cannot open: No such file or directory
tar: Exiting with failure status due to previous errors
==> There was an error downloading the binary file.

------> 1.4.7 platform specific fabric binary is not available to download <----

My intention is to run the below which also fails due to the failed library installation

ubuntu:/c/workspace/fabric-samples/first-network$ ./byfn.sh generate
Generating certs and genesis block for channel 'mychannel' with CLI timeout of '10' seconds and CLI delay of '3' seconds
Continue? [Y/n] y
proceeding ...
cryptogen tool not found. exiting