Step 1: Add Mongodb to your sources.list.d (for Ubuntu 14.04) This allows you to get the latest files from mongodb.org when you run sudo apt-get install echo “deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list Step 2: Reload the local package database sudo apt-get update Step 3: Install MongoDB sudo apt-get install -y mongodb-org -y automatically… Read More »
Step 1: Stop the service sudo service mongod stop Step 2: Remove packages sudo apt-get purge mongodb-org* Step 3: Remove data directories sudo rm -r /var/log/mongodb sudo rm -r /var/lib/mongodb -r means recursive Reference: https://docs.mongodb.org/v3.0/tutorial/install-mongodb-on-ubuntu/
A simple concept in the C language is the evaluation of a boolean expression with an if statement. But what if the condition is not a typical relational or boolean expression? In C, it is possible to write: if (x){ // if x is true or great than zero printf(“x is true/has a value/great than… Read More »
Came across this detailed paper “What Every Programmer Should Know About Memory” by Ulrich Drepper dated 21 November 2007. (http://www.akkadia.org/drepper/cpumemory.pdf) It is a long read but provides a wealth of background which explains some good fundamental concepts that are still valid today. Another article, http://marek.vavrusa.com/c/memory/2015/02/20/memory/ puts another “practical” spin on the original paper and is also… Read More »
If you encounter this error in Eclipse check if you are declaring a function within a function. Nested functions are available as a language extension in GCC but not part of the standard language. So the next time you see ‘invalid storage class for function ‘blah’, do a quick check on where you have defined… Read More »
http://stackoverflow.com/questions/1433204/how-do-i-use-extern-to-share-variables-between-source-files-in-c
Well, almost my favourite, but it is pretty cryptic to say the least. All I was trying to do was run the default Hello World C program after a fresh install of Eclipse. (4.4 in this case) on Ubuntu 14.04 After a bit of searching, this post nailed it. http://stackoverflow.com/questions/11390163/running-ubuntu-eclipse-c-helloworld I was trying to execute… Read More »
I have been wanting to do this for quite some time but had absolutely no idea how it was even possible. But with the power of the internet and lots of background reading, I managed to turn on and off an LED that was connected to the GPIO pins of my raspberry pi. This blog… Read More »
Intro I wanted to figure out how to run bash scripts in Mule ESB so my first point of call? Google. Google returned a few useful results. Primarily: http://stackoverflow.com/questions/13039604/running-shell-scripts-from-mule-esb and http://mule.1045714.n5.nabble.com/Can-I-run-a-shell-script-from-Mule-Jython-td2658688.html Being new to this I couldn’t make out much but 2 things stuck out. Groovy and “ls”.excute(). Armed with these 2 clues, I tried… Read More »
I don’t know how many times I’ve hit this error. Basically it means that another application is already using the port that your application is trying to use. You have 2 choices here. You can either close this port down or ask your application to use another port. I find it easy to close the… Read More »