22 essential Linux security commands

There are many aspects to security on Linux systems – from setting up accounts to ensuring that legitimate users have no more privilege than they need to do their jobs. This is look at some of the most essential security commands for day-to-day work on Linux systems.sudo
Running privileged commands with sudo  – instead of switching user to root  – is one essential good practice as it helps to ensure that you only use root privilege when needed and limits the impact of mistakes. Your access to the sudo command depends on settings in the /etc/sudoers and /etc/group files. [ Two-Minute Linux Tips: Learn how to master a host of Linux commands in these 2-minute video tutorials ]
$ sudo adduser shark
Adding user `shark’ …
Adding new group `shark’ (1007) …
Adding new user `shark’ (1007) with group `shark’ …
Creating home directory `/home/shark’ …
Copying files from `/etc/skel’ …
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for shark
Enter the new value, or press ENTER for the default Full Name []: shark Room Number []: Work Phone []: Home Phone []: Other []:
Is the information correct? [Y/n] Y

If you run sudo and ask who you are, for example, you’ll get confirmation that you’re running the command as root.To read this article in full, please click here(Insider Story) READ MORE HERE…

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5 open source security tools too good to ignore

Open source is a wonderful thing. A significant chunk of today’s enterprise IT and personal technology depends on open source software. But even while open source software is widely used in networking, operating systems, and virtualization, enterprise security platforms still tend to be proprietary and vendor-locked. Fortunately, that’s changing. If you haven’t been looking to open source to help address your security needs, it’s a shame—you’re missing out on a growing number of freely available tools for protecting your networks, hosts, and data. The best part is, many of these tools come from active projects backed by well-known sources you can trust, such as leading security companies and major cloud operators. And many have been tested in the biggest and most challenging environments you can imagine. To read this article in full, please click here READ MORE HERE…

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