gistfile1.txt

jatin@jatin-Lenovo:~$ sudo apt-get install zlib1g-dev:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libntdb1 linux-headers-4.2.0-16 linux-headers-4.2.0-16-generic
  linux-headers-4.2.0-38 linux-headers-4.2.0-38-generic
  linux-image-4.2.0-16-generic linux-image-4.2.0-38-generic
  linux-image-extra-4.2.0-16-generic linux-image-extra-4.2.0-38-generic
  linux-signed-image-4.2.0-16-generic linux-signed-image-4.2.0-38-generic
  python-ntdb
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
  zlib1g-dev:i386
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
Need to get 0 B/167 kB of archives.
After this operation, 403 kB of additional disk space will be used.
(Reading database ... 329828 files and directories currently installed.)
Preparing to unpack .../zlib1g-dev_1%3a1.2.8.dfsg-2ubuntu4_i386.deb ...
Unpacking zlib1g-dev:i386 (1:1.2.8.dfsg-2ubuntu4) ...
dpkg: error processing archive /var/cache/apt/archives/zlib1g-dev_1%3a1.2.8.dfsg-2ubuntu4_i386.deb (--unpack):
 trying to overwrite '/usr/include/i386-linux-gnu/zconf.h', which is also in package lib32z1-dev 1:1.2.8.dfsg-2ubuntu4
Processing triggers for man-db (2.7.4-1) ...
Errors were encountered while processing:
 /var/cache/apt/archives/zlib1g-dev_1%3a1.2.8.dfsg-2ubuntu4_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

gistfile2.txt

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