examples/intro/redirection_tcsh.txt
$ ls -l /bin/bash /bing/other > out
ls: /bing/other: No such file or directory


$ ls -l /bin/bash /bing/other  > & out
(combine stdout and stderr)


$ (ls -l /bin/bash /bing/other  > out) > & err
(direct stdout to 'out' and stderr to 'err')

tcsh cannot directly redirect stderr but we can use a subshell with the parentheses.