Hash tables are a data structure that seek to solve the time complexity problem of arrays and linked lists. With arrays and linked lists, one has to traverse through the lists in order to get the particular element they are looking for. This leads to...
In C, most of the code you'll execute is inside functions. Think of functions as some processes that happen when a program runs. Keeping that analogy of a process or a routine, it is important to note that the total of these processes constitutes a t...
After writing a C program, to use it, it must be compiled to make an executable file that can be run. The GNU/Linux system comes with a native compiler, the gcc compiler that can be used to do just this. The way to compile with gcc is simply to invok...
Expansions. From our previous discussion on wildcards, we know a little bit about expansions. For example, the * character expands to include all characters present. This expansion occurs before any shell command is executed hence the shell would not...
Special characters. The characters typed onto the terminal can have special meanings. One of these is the * which means to match any characters. These special characters can be challenging to write when executing commands on the terminal. e.g. the ec...
change users, id, and accessibility of the file.
Normally, to determine the file type, we use the file command. The way it works is that it uses a file /etc/magic to determine the type of file. Now if you have a custom file type, and you want to determine if a file is of that type, a magic file can...
having learnt some basics on how the shell works, Here are some more command manipulations on the shell. Links The way to create links is by using the ln command. man ln to learn more on the command. There are two types of links in GNU/Linux. symbo...
Shell scripting is a useful task for any engineer. While shell scripts get a lot of flack for not being a great scripting language, it is nevertheless a useful skill to have, and not just for DevOps engineers. Here are a few basic scripts, and comman...
