The sudo command not found error can occur when the sudo group is not present on your system. To fix this issue, you must join the sudo group and install the package that you need.
Ways to Fix sudo command not found error on Linux
on GNU/Linux
If you type sudo where is sudo to find out if it is installed somewhere, you probably do not have it installed.
on FreeBSD and Other Unices
If you are not logged in as root and want to use sudo, you must first log out of your user account and be on the Unix login screen. Type root as the user name, press Enter followed by the root password, and press Enter again. An eight appears at the prompt to indicate that you are logged in as a privileged user. To add the binary package for sudo, type pkg_add -rv sudo and press Enter. Agree to the installation when prompted, and then wait for the installation to complete.
Final Words
If we try to use the sudo command on systems where sudo is not installed, we get the error message “sudo: command not found”. If we try to use the sudo command in the terminal below, we get the error message “sudo: cannot open file: No such file or directory”. What can we do to fix this problem? ..
