$ echo $SHELL
/bin/bash
$ setenv
No command 'setenv' found, did you mean:
 Command 'netenv' from package 'netenv' (universe)
setenv: command not found

$ csh
% setenv | tail -n 1
_=/bin/csh
% 

##</code><code>##


$ cat test
#!/bin/csh
echo "trying to use setenv"
setenv | tail -n 1
$ ./test
trying to use setenv
_=./test