first i changed into the Downloads directory
pentestblack@kali:~$ cd Downloads/
then visit the arachni download page
and choose either the 32-bit or 64-bit download if your not sure what you have grab the 32-bit one, for this demo we are using the 32-bit download, so now we need to get wget to fetch the file
pentestblack@kali:~/Downloads$ wget https://github.com/Arachni/arachni/releases/download/v1.4/arachni-1.4-0.5.10-linux-i686.tar.gz
we also want the SHA1 checksum (this is to check the integrity of the file you download ensuring it hasn't been tampered with)
pentestblack@kali:~/Downloads$ wget https://github.com/Arachni/arachni/releases/download/v1.4/arachni-1.4-0.5.10-linux-i686.tar.gz.sha1
Once they have both downloaded verify the download
pentestblack@kali:~/Downloads$ cat arachni-1.4-0.5.10-linux-i686.tar.gz.sha1
This will give us the SHA1 checksum which is (at time of writing)
b0979003bae7d05020c9388e40113775df11d03a
copy this number by highlighting it, right click and select copy, next command
pentestblack@kali:~/Downloads$ echo b0979003bae7d05020c9388e40113775df11d03a arachni-1.4-0.5.10-linux-i686.tar.gz | sha1sum -c
you should see
arachni-1.4-0.5.10-linux-i686.tar.gz: OK
if you see ANYTHING other than this line do not proceed as it would mean the file you have download has most likely been tampered with and any installation of the files may lead to security issues and/or compromise of your system, for example
arachni-1.4-0.5.10-linux-i686.tar.gz: FAILED
sha1sum: WARNING: 1 computed checksum did NOT match
Once have verified the download we can now complete the next few steps quickly
pentestblack@kali:~/Downloads$ tar -zxvf arachni-1.4-0.5.10-linux-i686.tar.gz
This will create a new folder called arachni-1.4-0.5.10 and we now need to change into this directory
pentestblack@kali:~/Downloads$ cd arachni-1.4-0.5.10/
now we are in that directory we need to change into the bin directory
pentestblack@kali:~/Downloads/arachni-1.4-0.5.10$ cd bin
now we are ready to launch arachni_web, to do this simply run
pentestblack@kali:~/Downloads/arachni-1.4-0.5.10/bin$ ./arachni_web
after a few seconds you will see the following output
Puma 2.14.0 starting...
* Min threads: 0, max threads: 16
* Environment: development
* Listening on tcp://localhost:9292
now open a web browser and enter
localhost:9292
and you will see the arachni_web login page (as shown below)
default credentials are
username: admin@admin.admin
password: administrator
you will now be logged into the arachni_web (as shown below)
congratulations you have now installed arachni_web on kali linux
you can check the video on youtube