How to send a system message to all *BSD users

Any good system administrator needs to be able to send authoritative messages to any online users. Fortunately, with BSD variants such as FreeBSD and OpenBSD, it is very easy with a tool called “wall”.
To send a general message to all users logged into the system, follow this format:

# wall
your message here
more of your message

At the […]

Server OS Profile: OpenBSD

OpenBSD is a derivative of the free and open source Unix operating system BSD, which was first developed at the University of California, Berkeley. The OS is probably best known for its mascot, the puffer fish named Puffy, and also for its very popular sub-project OpenSSH, which is used on many of the servers around […]

BSD Flavors for Servers

Although Windows and Linux dominate most headlines about server operating systems, many system administrators prefer the stability and security of BSD (Berkeley Software Distribution). BSD is a Unix-like operating system, originally developed at the University of California at Berkeley. Although the original code is scarcely used anymore, it has many descendants, including the […]

Popular Server Operating Systems

Although many debates about which operating system is best for hosting a server usually revolve around Linux and Windows, they are just two of many server-ready operating systems available. Some are free and open like Linux, while others are commercial and closed. Here is a brief list of some of the most popular […]

What Is OpenSSH?

SSH stands for Secure Shell. OpenSSH is the open source version of SSH. But what is it used for?
Secure Shell is a protocol for securing your network connections to prevent hacking, eavesdropping, and other server attacks. It is used to encrypt data that is passed from one computer to another. It is very important when […]