In one of my classes we're creating a shell in C. I've got everything working except how to store local variables. global variables are being stored in "extern char** environ" and right now I'm ...

Ever wondered why programming in Bash is so difficult? Bash employs the same constructs as traditional programming languages; however, under the hood, the logic is rather different. The Bourne-Again ...

Shell Account Enhancements Welcome to old-style Internet access -- souped up for your surfing pleasure! In this chapter I take you on a fast flight through the few Macintosh programs that can work ...

GUIs are great—we wouldn’t want to live without them. But if you’re a Mac or Linux user and you want to get the most out of your operating system (and your keystrokes), you owe it to yourself to get ...

I know "encrypt" isn't the right description here. It's more like trying to "obfuscate" or "scramble" a password in a plaintext shell script. Say you have a UNIX shell script that does FTP to Windows ...

One particular frustration with the UNIX shell is the inability to easily schedule multiple, concurrent tasks that fully utilize CPU cores presented on modern systems. The example of focus in this ...

OPERATING SYSTEM VENDORS talk a good game in terms of interoperability, but their objective is to get you off competitors’ software and onto theirs. As such, transparent interoperability is not a high ...