Regular expression problem(s) in Bash: [^negate] doesn’t seem to work

When I execute ls /directory | grep '[^term]' in Bash I get a regular listing, as if the grep command is ignored somehow. I tried the same thing with egrep, I tried to use it with double and single quotes, but to no better results. When I try ls /directory | grep '^[term] I get all entries beginning with term – as expected.

Kill backgrounded SSH when shell exits

I’m trying to spawn an SSH from my bash profile script that runs in the background for connection sharing (via its control socket). The problem I’m running into is a reliable way to ensure the SSH doesn’t stay running once the TTY is closed (or more directly; once the parent bash shell has exited).