Error while installing Frappe/Bench [SOLVED]

I am facing problem while installing Frappe/bench in my system following easy installation process. This is the installation log-

Installing for Ubuntu vivid amd64
In case you encounter an error, you can post on https://discuss.frappe.io

Adding ubuntu mariadb repo
Installing packages for Ubuntu. This might take time...
Installing wkhtmltopdf
Installing wkhtmltox package for trusty (Ubuntu 14.4) even if you are using vivid.--2015-11-10 09:31:47--  http://download.gna.org/wkhtmltopdf/0.12/0.12.2.1/wkhtmltox-0.12.2.1_linux-vivid-amd64.deb
Resolving download.gna.org (download.gna.org)... 78.40.125.79
Connecting to download.gna.org (download.gna.org)|78.40.125.79|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2015-11-10 09:31:48 ERROR 404: Not Found.

My OS is- Ubuntu 15.04 \n \l

How can i solve this problem?

Thanks for reporting. Will fix and update you soon.

Welcome. Waiting for your update.

Looks like the issue is from the script trying to install a wkhtmltox release for vivid but a release for vivid doesn’t exist. The scrip says that its downloading the package for trusty yet it tires to grab one for vivid. Let me know if you want me to fix this with a pull request.

Fixed. Please check and let us know.

@saurabh6790 Sorry for late reply (Installation was taking some time). There is a new problem. I have tried to install 3 times but still getting some (same) errors. Here is the log-

Installing for Ubuntu vivid amd64
In case you encounter an error, you can post on https://discuss.frappe.io

Adding ubuntu mariadb repo
Hit http://ams2.mirrors.digitalocean.com vivid InRelease
Hit http://security.ubuntu.com vivid-security InRelease
Hit http://ams2.mirrors.digitalocean.com vivid/main amd64 Packages
Hit http://ams2.mirrors.digitalocean.com vivid/main i386 Packages
Ign http://ams2.mirrors.digitalocean.com vivid/main Translation-en_US
Ign http://ams2.mirrors.digitalocean.com vivid/main Translation-en
Hit http://bd.archive.ubuntu.com vivid InRelease
Hit http://bd.archive.ubuntu.com vivid-updates InRelease
Hit http://bd.archive.ubuntu.com vivid-backports InRelease
Hit http://bd.archive.ubuntu.com vivid/main Sources
Hit http://bd.archive.ubuntu.com vivid/universe Sources
Get:1 http://bd.archive.ubuntu.com vivid/restricted amd64 Packages [15.4 kB]
Hit http://security.ubuntu.com vivid-security/main Sources
Get:2 http://bd.archive.ubuntu.com vivid/multiverse amd64 Packages [134 kB]
Hit http://security.ubuntu.com vivid-security/restricted Sources
Hit http://security.ubuntu.com vivid-security/universe Sources
Hit http://security.ubuntu.com vivid-security/multiverse Sources
Hit http://security.ubuntu.com vivid-security/main amd64 Packages
Hit http://security.ubuntu.com vivid-security/restricted amd64 Packages
Get:3 http://bd.archive.ubuntu.com vivid/main i386 Packages [1,361 kB]
Hit http://security.ubuntu.com vivid-security/universe amd64 Packages
Hit http://security.ubuntu.com vivid-security/multiverse amd64 Packages
Hit http://security.ubuntu.com vivid-security/main i386 Packages
Hit http://security.ubuntu.com vivid-security/restricted i386 Packages
Hit http://security.ubuntu.com vivid-security/universe i386 Packages
Hit http://security.ubuntu.com vivid-security/multiverse i386 Packages
Hit http://security.ubuntu.com vivid-security/main Translation-en
Hit http://security.ubuntu.com vivid-security/multiverse Translation-en
Hit http://security.ubuntu.com vivid-security/restricted Translation-en
Hit http://security.ubuntu.com vivid-security/universe Translation-en
Get:4 http://bd.archive.ubuntu.com vivid/universe i386 Packages [6,486 kB]
Get:5 http://bd.archive.ubuntu.com vivid/multiverse i386 Packages [134 kB]
Get:6 http://bd.archive.ubuntu.com vivid/main Translation-en [793 kB]
Get:7 http://bd.archive.ubuntu.com vivid/multiverse Translation-en [103 kB]
Get:8 http://bd.archive.ubuntu.com vivid/restricted Translation-en [4,228 B]
Get:9 http://bd.archive.ubuntu.com vivid/universe Translation-en [4,456 kB]
Get:10 http://bd.archive.ubuntu.com vivid-updates/main Sources [103 kB]
Get:11 http://bd.archive.ubuntu.com vivid-updates/restricted Sources [3,687 B]
Get:12 http://bd.archive.ubuntu.com vivid-updates/universe Sources [44.8 kB]
Get:13 http://bd.archive.ubuntu.com vivid-updates/multiverse Sources [1,957 B]
Get:14 http://bd.archive.ubuntu.com vivid-updates/main amd64 Packages [247 kB]
Get:15 http://bd.archive.ubuntu.com vivid-updates/restricted amd64 Packages [13.1 kB]
Get:16 http://bd.archive.ubuntu.com vivid-updates/universe amd64 Packages [122 kB]
Get:17 http://bd.archive.ubuntu.com vivid-updates/multiverse amd64 Packages [5,195 B]
Get:18 http://bd.archive.ubuntu.com vivid-updates/main i386 Packages [244 kB]
Get:19 http://bd.archive.ubuntu.com vivid-updates/restricted i386 Packages [12.8 kB]
Get:20 http://bd.archive.ubuntu.com vivid-updates/universe i386 Packages [123 kB]
Get:21 http://bd.archive.ubuntu.com vivid-updates/multiverse i386 Packages [5,394 B]
Get:22 http://bd.archive.ubuntu.com vivid-updates/main Translation-en [119 kB]
Get:23 http://bd.archive.ubuntu.com vivid-updates/multiverse Translation-en [2,246 B]
Get:24 http://bd.archive.ubuntu.com vivid-updates/restricted Translation-en [2,969 B]
Get:25 http://bd.archive.ubuntu.com vivid-updates/universe Translation-en [71.3 kB]
Hit http://bd.archive.ubuntu.com vivid-backports/main Sources
Hit http://bd.archive.ubuntu.com vivid-backports/restricted Sources
Hit http://bd.archive.ubuntu.com vivid-backports/multiverse Sources
Hit http://bd.archive.ubuntu.com vivid-backports/main amd64 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/restricted amd64 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/multiverse amd64 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/main i386 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/restricted i386 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/multiverse i386 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/main Translation-en
Hit http://bd.archive.ubuntu.com vivid-backports/multiverse Translation-en
Hit http://bd.archive.ubuntu.com vivid-backports/restricted Translation-en
Hit http://bd.archive.ubuntu.com vivid/restricted Sources
Hit http://bd.archive.ubuntu.com vivid/multiverse Sources
Hit http://bd.archive.ubuntu.com vivid/main amd64 Packages
Hit http://bd.archive.ubuntu.com vivid/universe amd64 Packages
Hit http://bd.archive.ubuntu.com vivid/restricted i386 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/universe Sources
Hit http://bd.archive.ubuntu.com vivid-backports/universe amd64 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/universe i386 Packages
Hit http://bd.archive.ubuntu.com vivid-backports/universe Translation-en
Fetched 9,414 kB in 4min 50s (32.4 kB/s)
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/vivid-updates/main/source/Sources  Hash Sum mismatch

W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/vivid-updates/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/vivid-updates/universe/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/vivid-updates/main/binary-i386/Packages  Hash Sum mismatch

W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/vivid-updates/universe/binary-i386/Packages  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.

Is it due to slow connections ? or for other reasons?

Sorry this is was my bad. You can install trusty wkhtmltox deb on vivid just fine, i tried to fix the install script, but there was a bug that just got fixed:

OK. At last, a few moments ago, installation process has completed successfully.

My problem is solved now. Thanks everyone for responding.