On Wed, Jun 23, 2021 at 06:51:39AM +0300, Andrei POPESCU wrote:
[...]
comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc
/var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort
-u)
Command substitution without '$'? I must be missing something and
would
appreciate a pointer.
As David pointed out (as a pointer), the <(...) is a bashism for
"pretend this is
a file name whose content is provided by the enclosed command's
output".
Perhaps more readable in the symmetrical variant
diff -u <(ls dir1) <(ls dir2)
Very handy.