Не удается запустить Petalinux в Ubuntu 20.04

Я не могу запустить Petalinux. Установка выполнена успешно. Есть проблема с башом. Как это исправить?

INFO: Installing PetaLinux...
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WARNING: You haven't specified the installation location.
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WARNING: By default, it will be installed in your working directory: /scratch2/abc/Xilinx/Petalinux
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Please input "y" to proceed the installation, "n" to exit otherwise:y
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WARNING: PetaLinux installation directory: /scratch2/abc/Xilinx/Petalinux/. is not empty!
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Please input "y" to continue to install PetaLinux in that directory?[n]y
INFO: Checking PetaLinux installer integrity...
INFO: Installing PetaLinux SDK to "/scratch2/abc/Xilinx/Petalinux/."
INFO: Installing buildtools in /scratch2/abc/Xilinx/Petalinux/./components/yocto/buildtools
INFO: Installing buildtools-extended in /scratch2/abc/Xilinx/Petalinux/./components/yocto/buildtools_extended
INFO: PetaLinux SDK has been installed to /scratch2/abc/Xilinx/Petalinux/.
abc@alpha:/scratch2/abc/Xilinx/Petalinux$ 

abc@alpha:/scratch2/abc/Xilinx/Petalinux$ /settings.sh
bash: /settings.sh: No such file or directory

Проблема такая же, если я использую точку

abc@alpha:/scratch2/abc/Xilinx/Petalinux$ ./settings.sh
bash: ./settings.sh: Permission denied

Я также пробовал с исходным кодом. Тем не менее это жалоба на bash.

abc@alpha:/scratch2/abc/Xilinx$ source Petalinux/settings.sh
PetaLinux environment set to '/scratch2/abc/Xilinx/Petalinux'
WARNING: /bin/sh is not bash! 
bash is PetaLinux recommended shell. Please set your default shell to bash.
WARNING: This is not a supported OS
INFO: Checking free disk space
INFO: Checking installed tools
INFO: Checking installed development libraries
INFO: Checking network and other services
WARNING: No tftp server found - please refer to "UG1144 2021.1 PetaLinux Tools Documentation Reference Guide" for its impact and solution
abc@alpha:/scratch2/abc/Xilinx$

Когда я запускаю "chsh -s /bin/bash", чтобы изменить оболочку на bash. Я получаю следующую проблему.

abc@alpha:/scratch2/abc/Xilinx$ chsh -s /bin/bash
Password: 
chsh: user 'abc' does not exist in /etc/passwd
abc@alpha:/scratch2/abc/Xilinx$