Category Archives: OS X

What Is GREP and How Do You Use It?

Grep is a small Unix program for finding matching patterns. Begun as a Unix program, it can be found on Linux as well as Mac and BSD. It can read just about any text, meaning it can read input from another commands, or it can open and look through files directly. Grep is insanely useful, especially for looking through directories from the command line.

Source: What Is GREP and How Do You Use It? – Make Tech Easier

Understanding Linux Permissions

Linux is a multiuser operating system. In a multiuser environment, it is necessary to ensure that a user cannot access or modify files or directories that they arent supposed to. File permissions provide a protection mechanism for controlling access to files and directories.

Linux’s file security model is based on that of Unix. Each file or directory can be accessed or modified by the user who created it, or a group of users who have been given permission to do so. Permissions can also be defined for other users that do not belong to either of these two categories.

In this guide, we will go over how file permissions work in Linux for beginners. We’ll cover how you can view the permissions associated with files and directories and also how you can change them.

Source: Understanding Linux Permissions (Linux Academy)

Enpass Is The Free Cross-Platform Password Manager

Previously we covered KeePassXC password manager which is also free application. Here comes another password manager called Enpass, it is free and cross-platform available for Linux, Windows, Mac, Android, Blackberry, Windows Phone and iOS.

Source: Enpass Is The Free Cross-Platform Password Manager (NoobsLab)

How to Pass Arguments to a Bash-Script

You can write a bash script such that it receives arguments specified when the script is called from the command line. This method is used when a script has to perform a slightly different function depending on the values of input parameters (the arguments).

For example, you may have a script called “stats.sh” that performs a particular operation on a file, such as counting its words. If you want to be able to use that script on many files, it is best to pass the file name as an argument, so that you can use the same script for all the files to be processed.

Source: How to Pass Arguments to a Bash-Script (Lifewire)

Keep local Instant Messages on your local network with BeeBEEP (Secure Lan Messenger)

When you want to send an instant message to someone else that’s on the same local network as you are, whether that be another family member or a co-worker in your office, why use an offsite chat server that leaves your messages open to interception by the company running the chat server or some other third party? This software will allow you to keep your local IM’s in your local network, and for added safety it also encrypts them! Plus, it supports multiple operating systems, unlike the proprietary chat client that might have come with your computer. It’s NOT for chatting with people elsewhere on the internet; if you need to set up secure connections with offsite chat clients then you may need to set up a private Prosody IM server. But for secure IM chats with people on your local network, this looks like just the thing!

What is BeeBEEP?

BeeBEEP is an open source, peer to peer, lan messenger developed by Marco Mastroddi. You can talk and share files with all the people inside your local area network such of an office, home or internet cafe. You don’t need a server, just download, unzip and start it. Simple, fast and secure.

Main Features:

  • Free: BeeBEEP is free and always will be.
  • Multiple OS: there are releases for Windows, MacOSX, Linux, OS/2 and eComStation.
  • Easy to use: BeeBEEP is a serverless application. Download, unzip and start.
  • Secure: encryption based on Rijndael Algorithm (AES).
  • Instant Messaging: chat with all people connected, group or single user.
  • Groups: create your favorite group of people.
  • P2P: send or share your files and folders (also by drag and drop).
  • Offline messages: messages will be delivered to offline users when they will be online.
  • Message History: all messages can be saved.
  • Source: BeeBEEP (Secure Lan Messenger)

    Detect Webcam & Microphone Activity on Mac with Oversight

    Though Mac users don’t usually have to worry excessively about “camfecting” malware and spyware, some security conscious users may find it nice to know if a process or application is attempting to access their computers web camera or microphone.

    Source: Detect Webcam & Microphone Activity on Mac with Oversight