USE NON-COMPATIBLE BINARRY

sometimes, I can find some apps in my distrubution, or I want a version that new or old, that I can get in my distrubution, and I can build it from scractch(probably need new/old gcc/clang or property),

use `ld-linux.so`

The ld-linux.so could search for shared and static libs (binnary libs, created by gcc/clang). The ld-linux.so will execute apps, when resolve the libs.

To run aircrack-ng, I should have some libs in my system, I could use the libs from wifislax too. Here, I have multi libs of linux wifislax in current directory.

LD_LIBRARY_PATH=$PWD/lib:$PWD/usr/lib ./ld-linux.so.2 ./aircrack-ng --help

Complex apps

for exemple, when apps wrap by bash scripts, like:

#!/bin/bash

aircrack-ng --help

the ld-linux.so cannot launch this script, to resorve this probleme:

recreate bash script
use export LD_LIBRARY_PATH

`ls-linux.so` problems

When useing export, how to tell linux what lib-linux.so should use, lib-linux.so.2 or lib-linux.so3 or $PWD/lib/ld-linux.so.2…

XDG Path Overrides

/usr/share is related to XDG_DATA_DIRS directly. We can use another location as a replacement for /usr/share by exporting it:

export XDG_DATA_DIRS=/tmp/new_2/usr/share:/usr/local/share:/usr/share

This is very useful for testing packages from other Linux distros after extracting/decompressing them, without needing root or installing anything system-wide.

Python Path Overrides

For the Python environment, use PYTHONPATH:

export PYTHONPATH=/tmp/new_2/usr/lib/python3.14/site-packages

⚠️ Avoid a leading : in PYTHONPATH (e.g. =:/tmp/...) — it adds the current directory as a search path, which can cause unexpected import errors.

Linux docs