The First Cry of Atom

2017 is the year when I kept struggling. At least I felt so. There was a wishlist which describes a bunch of what I wanted to do. Of course some of them were achieved but not all. It’s always true. The problem is that I am not satisified with what... [Read More]

ulimit is a utility tool to set some limitations of the user process. For example, you can set the maximum core file size by using ulimit -c command. [Read More]

Systemd enables you to bootstrap your service easily. The status of systemd service can be checked by using systemctl command. [Read More]

Maven wrapper is a library to make maven build easy. You do not need to install maven manually thanks to maven wrapper because it automatically install the specific maven version into your project. Since I usually use gradle wrapper and sbt-extras, it was very easy to use maven wrapper as... [Read More]

Radix sort is a sorting algorithm. This algorithm is efficient if we already know the range of target values. The time complexity of the algorithm is \(O(nk)\). \(n\) is the size of the input list and \(k\) is the digit length of the number. For example, The digit length of... [Read More]