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Build Wine rpm with 32 bit application support

Wine is a software to allow running Windows applications in Linux, MAC etc. platforms. It is available for installation from package managers like yum (RHEL, CentOS) and apt (Ubuntu). You can find more details on how it works in Wine wiki.

But the default Wine package available from package manager does not have support for 32 bit Windows applications. This was the case for me. In Redhat Enterprise Linux 7.3, the wine package did not contain support for 32 bit windows applications. So the only option was to build a separate rpm of wine which will include this support.

All the steps are executed on a RHEL 7.3 VM (x86_64).

Step 1
Download and run shell script which will make wine 64 and 32 support for RHEL: https://github.com/zma/usefulscripts/blob/master/script/install-wine-i686-centos7.sh It accepts a version no. as CLI parameter e.g. 2.0.3

The script installs wine in /usr/local/ directory by default. We can verify the files that are being copied for wine using "cd /usr/src/wine-2.0.…

Get current UTC timestamp in Python

Converting current time to UTC (GMT) in python is a very common query that is searched in Google but, I did not find a compact answer when I did the search for my work. I figured out the code by some help from Google and some experimentation of my own. I'll share the code, in case it is useful to someone.

First I'll explain the Epoch time (or POSIX/Unix time) and UTC (Coordinated Universal Time) time format.
Epoch time is calculated as number of seconds elapsed since midnight Jan 1, 1970. It is used in all *nix systems and has become a standard when considering date/time from multiple systems. In python time module allows us to get the current epoch time in local time zone.

UTC time is basically synonymous of GMT. It marks the 0 offset time zone. Time in all other time zones are calculated with positive/negative offset from UTC. It is used in many cases where there are multiple machines, located in different time zones are involved. To get current UTC time in python we use ut…

Upgrade wireshark version in Ubuntu

Wireshark is a great and may be most widely used network protocol analyzer. In last few months I had used it extensively in a network project. Wireshark was a great help in debugging hard to find protocol problems.

During this project I was using Ubuntu 10.04 as my development environment. I installed wireshark using
sudo apt-get install wireshark

But default wireshark version provided by Ubuntu 10.04 repository is 1.2.7 which was not suiting my purpose. I needed the newer versions of wireshark which provides some important features for analyzing protocols.

There are 2 ways to upgrade your wireshark version from the default version provided by Ubuntu -


Add a third party repository to your repo conf and you can upgrade the wireshark. But I do not prefer this way as it imposes the restriction of version that can be installed.Install wireshark from source. This is best way as you can install any version of wireshark in your Ubuntu.

Here are the steps to follow -
Download the wireshark sour…