I update the kernel, after that the Ubuntu doesn't work well, PS: I try to exec "meld" command, it will report that "/usr/bin/env: python: No such file or directory", then I exec "sudo apt-get install python" and get the result "python is already the newest version.", what should I do for it.
I'm not good at linux, can you tell me how to revert my linux to the last right status, or reinstall the python normally.
On Ubuntu 20.04 and newer, there is a package to fix this problem. Run the following commands:
Run
apt-cache show python-is-python3
for more info.