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Category Archives: bash
Linux-Fu: Help Messages for Shell Scripts and Here Documents
Imagine that you want to output multiple lines of text in Bash, or any shell script. Maybe it’s for a help string for a particularly convoluted shell script you’re writing. You could have a separate echo command for each line. Or you could use the “here document“.
The “here document” …read more
Posted in bash, Hackaday Columns, here document, linux, linux hacks
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Typing By Slamming Your Laptop Closed. Repeatedly
Do you sometimes feel that your custom mechanical keyboard is not quite loud enough to proclaim your superior hacking powers? Or do you need a more forceful way shout in all caps at someone who is wrong on the internet? For all this and more, [Jesse Li] has got you …read more
Posted in bash, computer hacks, cw, laptop, morse code
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Linux Fu: Leaning Down with exec
Shell scripting is handy and with a shell like bash it is very capable, too. However, shell scripting isn’t always very efficient. Think about it. If you run grep or tr or sort to do some operation in a shell script, you are spawning a whole new process. That takes …read more
Posted in bash, exec, Hackaday Columns, linux, Linux Fu, linux hacks, shell scripting, Skills
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Linux Fu: Debugging Bash Scripts
A recent post about debugging constructs surprised me. There were quite a few comments about how you didn’t need a debugger, as long as you had printf. For that matter, we’ve all debugged systems where you had nothing but an LED to flash or otherwise turn on to communicate …read more
Posted in bash, bashdb, debugging, Hackaday Columns, Linux Fu, linux hacks, shell script, Skills
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Linux Fu: Shell Scripts in C, C++, and Others
At first glance, it might not seem to make sense to write shell scripts in C/C++. After all, the whole point to a shell script is to knock out something quick and dirty. However, there are cases where you might want to write a quick C program to do something …read more
Posted in bash, c++, gcc, Hackaday Columns, linux, linux hacks, scripting, Skills
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Secret Messages Could be Hiding in Your Server Logs
[Ryan Flowers] writes in with a clever little hack that can allow you to hide data where nobody is going to go looking for it. By exploiting the fact that a web server will generally log all HTTP requests whether or not it’s valid, he shows how you can covertly …read more
Posted in bash, covert channel, curl, dead drop, encode, software hacks, web server
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Easy Git Repository Summaries With Web-git-sum
For those hosting their own git repositories there are a number of solutions for creating convenient web-accessible front ends, but [mitxela] wasn’t quite satisfied with any of them. After trying a number of alternatives and reflecting on his requirements, he realized that all he really needed was a summary page …read more
Posted in bash, Git, github, private server, repository, software, Software Development, web-git-sum
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Linux Fu: The Kitchen Sync
One of the great things about Linux and similar operating systems is they are configurable. If you don’t like something, there’s a great chance you can change it easily with a few entries in a file somewhere. For example, take bash — a very popular shell by any measure. If you want a different style of command line editing, there’s an option. You want the tab key to match files regardless of case? Another option. Usually, these are set in one of your so-called profile files like .bashrc in your home directory.
As long as you are sitting in front …read more
Posted in bash, Hackaday Columns, linux, Linux Fu, linux hacks
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Linux Fu: Modernize Your Command Line
If you use Linux and its associated tools on the desktop or on a Raspberry Pi, or on a server, you probably have used the command line. Some people love it and some people hate it. However, many of us have been using Linux for years and sometimes Unix before that, and we tend to use the same old tried-and-true tools. [Remy Sharp] had a recent post talking about how he had created aliases to replace those old tools with great modern replacements and it is definitely worth a read.
We’ll be honest, when we first saw the post we …read more
Posted in bash, command line, linux, Linux Fu, linux hacks
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