问题
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.
回答1:
Having been momentarily stumped by this error myself, I thought I'd post how I fixed my problem.
My problem was an error:
: No such file or directory
Which made little sense to me. My problem is that my editor had silently converted the script from Unix LF to Windows CR/LF line-termination. A rather unfortunate upshot of this is that "#!/usr/bin/env python" actually became "#!/usr/bin/env python\015" where \015 is the invisible CR character... /usr/bin/env was, then, unable to find a command "python\015" - hence the file-not-found error.
Converting the script to Unix line-ending convention solved my problem... but only after a few minutes' head-scratching.
来源：https://stackoverflow.com/questions/3655306/ubuntu-usr-bin-env-python-no-such-file-or-directory