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Greg Stark writes:
 > Martin Fluch <fluch@rock.helsinki.fi> writes:
 > > On Mon, 22 Nov 1999, Juli-Manel Merino Vidal wrote:
 > > > 
 > > > try the following PS1 (for root) and notice what happens:
 > > > 	export PS1='^[[1m^[[31m\h:\w\$^[[0m '

please read the bash man page and look for \[ and \]

 > > > Before you reach the end of the line, bash jump to the start of it...
 > > > and when you go back, it goes two lines above. Try it ! It's really
 > > > annoying.
 > Except that our bash has had a serious problem that is _not_ related to the
 > prompt. I see this problem without setting PS1 at all, just resize the window
 > and bash will start jumping around because it still has the old window size.
 > I'm not sure when this broke but it's been broken for a long long time. Always
 > meant to file a bug on this.

please do with a reproduceable example.

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