Update lib.md

Author: GiorgioCitterio

lib.md

@@ -1,3 +1,31 @@
+# General Guide to Installing Python Libraries on Major Linux Distributions Using *pip*
+---
+For installing *pip* on **Arch**, use the following command:
+```
+sudo pacman -S python-pip
+```
+For installing *pip* on **Debian** and **Ubuntu**, use the following command:
+```
+sudo apt install python3-pip
+```
+---
+**Arch Linux - Debian - Ubuntu**
+
+After installing *pip* for any of these distributions or their derivatives, you can install any library using the following command:
+```
+pip install libraryName
+```
+If this command doesn't work, you may need to specify the pip version to use, for example:
+```
+pip3 install libraryName
+```
+To uninstall a library, use the command:
+```
+pip uninstall libraryName
+```
+---
+In case of any issues, you can search the internet for your specific problem and distribution to find a resolution.
+
 # Guida generale all'installazione delle librerie python nelle principali distro linux utilizzando *pip*
 ---
 Per l'installazione di *pip* su **Arch** il comando sarà il seguente: