Fix Wrong sources.list entry or malformed file after install skype on Ubuntu 64bit

Today, after install skype (32bit) on Ubuntu 14.04 64 bit used gdedi, i have some error:
After "apt-get update": Unable to find expected entry 'main/binary-i386sudo/Packages' in Release file (Wrong sources.list entry or malformed file)
So i can not update my Ubuntu. You can fix it using this method:

#dpkg --print-foreign-architectures
You can get
i386
i38
i386sudo
...
Remove wrong architecture:

#dpkg --remove-architecture i386
You can use:

#sudo apt-get remove --purge `dpkg --get-selections | grep i386 | awk '{print $1}'`
and

#dpkg -l | grep i386
to find i386 packet to remove
Then apt-get update now.

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Thanks for reading
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Security Research
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.

Nam Habach