I run on a VM:
$ time make buildkernel KERNCONF=GENERIC-NODEBUG >& log.nodebug
later I wanted to do the same on an other VM. I checked the history, did a copy and paste of the history output of the shell:
$ time make buildkernel KERNCONF=GENERIC-NODEBUG > & log.nodebug
and it failed due the space between ">" and "&", which should be ">&"
I never typed "> &" with a space, this was the csh.
The first VM runs with csh, the second with bash. The bash does not like "> &", same for the zsh.
I think that the csh history should not insert a space between ">&".
How to repeat:
csh% date >& /dev/null
csh% history | tail -2
298 17:46 date > & /dev/null
299 17:46 history | tail -2