Article
Elasticsearch initially began as a custom search engine. These days, it has gone above and beyond that singular role as it's part of log aggregation stacks, security monitoring, and even as a datastore for performing exploratory analysis. Indices in Elasticsearch are where the data is stored, and there are often...
Sathiya Sarathi Gunasekaran
The digital revolution has changed our lives in many ways. Nowadays, our picture albums, music collections, bookshelves etc. are all digital - binaries written on a disk. Our life and work are shared between a multitude of devices. Companies have development, staging, testing areas and dozens of developers connected to...
Dragan Bjekic
File access permissions and security are at the heart of *nix-based operating systems. File objects can belong to users and/or groups, and at times they need to be shared with various combinations of those two. There are multiple ways in *nix systems to reinforce secure sharing of these objects....
Bash utilities make so many tasks simple, but not all tasks have a straightforward command or operator. A very common and usual task in many scripting scenarios is concatenating string variables. Bash doesn't have a built-in function or command-line utility to concatenate two strings together. However, there are many ways...
In Linux, ls -l would list the files and directories in a particular path, with their names, dates, and sizes (disk usage). The first thing you'll notice using that command is that the size of directories is always shown as 4096 bytes (or 4,0K if you're using ls -lh)...
Ruslan Hasanov
When managing a computer, we may want to automate some tasks to run in certain periods or at the same time on each day/week/month. On a desktop, we may schedule update checks or virus scans. On a server, it's not uncommon for a myriad of checks and clean...
The cat command is a Unix tool used for manipulating and displaying file contents. The command gets its name from the word "concatenate" because it has, among other things, the ability to concatenate files. In this article, we'll go through a few easy ways to use this command...
Kristina Popovic
Grep is a powerful, yet very simple tool. By default, it searches through an input and prints a single or multiple lines that contain text matched to a pattern specified in the command call. Before grep became such a widespread tool for the GNU/Linux system, it used to be...
Mina Krivokuća
SCP stands for Secure Copy Protocol. It is a tool that can be used to transfer files from a local host to a remote host, from a remote host to a local host, or between two remote hosts. In this article, we'll examine how to use SCP to copy between...
Jacob Stopak
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