I consistently have more than one terminal open. Anywhere from two to ten, doing various bits and bobs. Now let's say I restart and open up another set of terminals. Some remember certain things, some forget.

I want a history that:

• Remembers everything from every terminal
• Is instantly accessible from every terminal (eg if I ls in one, switch to another already-running terminal and then press up, ls shows up)
• Doesn't forget random things if there are spaces at the front of the command.

Anything I can do to make bash work more like that?

I consistently have more than one terminal open. Anywhere from two to ten, doing various bits and bobs. Now let's say I restart and open up another set of terminals. Some remember certain things, some forget.

I want a history that:

• Remembers everything from every terminal
• Is instantly accessible from every terminal (eg if I ls in one, switch to another already-running terminal and then press up, ls shows up)
• Doesn't forget command if there are spaces at the front of the command.

Anything I can do to make bash work more like that?