the third command is not working
echo "umask 0022" >> ~/.bashrc
EDIT : THIS HAS BEEN SOLVED
but i am facing another problem now..
LAPTOP-I0N13D38:/tmp$ wget http://mirrors.kernel.org/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.9_amd64.deb -O libstdc++.deb
--2018-06-29 05:57:07-- http://mirrors.kernel.org/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.9_amd64.deb
Resolving mirrors.kernel.org (mirrors.kernel.org)... 198.145.21.9, 2001:19d0:306:6:0:1994:3:14
Connecting to mirrors.kernel.org (mirrors.kernel.org)|198.145.21.9|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://mirrors.edge.kernel.org/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.9_amd64.deb [following]
--2018-06-29 05:57:08-- http://mirrors.edge.kernel.org/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.9_amd64.deb
Resolving mirrors.edge.kernel.org (mirrors.edge.kernel.org)... 147.75.101.1, 2604:1380:2001:3900::1
Connecting to mirrors.edge.kernel.org (mirrors.edge.kernel.org)|147.75.101.1|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2018-06-29 05:57:08 ERROR 404: Not Found.