Generating requirements.txt from mounted filesystem?

Question

My Ubuntu OS had some problem so I mounted it on a recovery(temporary) OS. Now I have access to all my previous files from the path /mnt (eg the 'home' folder will be at /mnt/home/ ).

I need to generate a requirements.txt file of all the Python2.7 libraries installed in my previous OS. If is use pip freeze , I get the list of libraries of only the current OS.

How do I generate the requirements.txt from a mounted filesystem?

Answer 1

you can execute a chroot inside your mount point for example

chroot /mnt

and after execute:

pip freeze

for show the system library you can execute:

dpkg -l | grep python