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I can't login to root on VPS server. But login to usual user is successful. I've tried to login username and after that change to root by commands su - root and su -. These commands fail after successful password attempt with message "Cannot execute username: No such file or directory" where username my current username.
I think that error come after my try change username login access with chsh command (something like chsh --shell /bin/sh username). There is no sudo access on my user. What can I do solve this problem?

  • @Kusalananda su - either didn't help. Failed with same message – Axbor Axrorov Oct 15 '18 at 18:40
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Try this solution:

su -s /bin/bash username

From man su:

-s, --shell=shell

Run the specified shell instead of the default. The shell to run is selected according to the following rules, in order:

  • the shell specified with --shell

  • the shell specified in the environment variable SHELL, if the --preserve-environment option is used

  • the shell listed in the passwd entry of the target user

  • /bin/sh

Update: Try to check is you have valid /etc/passwd file.

  • didn't help. nothing changed – Axbor Axrorov Oct 15 '18 at 19:12
  • @AxborAxrorov Try to check is you have valid /etc/passwd file. – Ivan Gurzhiy Oct 15 '18 at 19:23

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