Using history command in bash script

[Bert Swart]

On Fri, Feb 24, 2012 at 01:59:39PM +0100, Johnny Rosenberg wrote:
> Den 24 februari 2012 13:12 skrev Johnny Rosenberg <gurus.knugum at gmail.com>:
> > Seems not to be possible.
> >
> > ~$ cat > pa
> > #!/bin/bash
> >
> > history
> > history
> > history
> > <Ctrl+d>
> > ~$ chmod +x pa
> > ~$ pa
> > ~$
> >
> > So there seem to be no history entries available when I run history
> > from a bash script. Why is this?
> >
> > I also tried to use the ~/.bash_history file, but it doesn't seem like
> > events are added to it for each command executed, since at least a
> > couple of ten commands are missing at the end. Seems like things are
> > added to the .bash_history file ”now and then”, I'm not sure how
> > often. How can I get around this? Where are the latest history lines
> > recorded before they are added to the actual .bash_history file?
> >
> > I'm trying to make a bash script that creates an alias for my last
> > command and save it in my .bash-aliases file (which is launched from
> > the .bashrc file), so I need some way to know what my latest command
> > was.
> >
> >
> > Kind regards
> >
> > Johnny Rosenberg
> > ジョニー・ローゼンバーグ
> 
> About that .bash_history file:
> At the moment, my history is 620 entries. If I look in the
> .bash_history file, the last command there match entry 527 of the
> history command's output. Where are the 93 missing entries? Can I
> force bash to write those to the .bash_history file?
Yes, set history -a in your .bashrc
> 
> 
> Kind regards
> 
> Johnny Rosenberg
> ジョニー・ローゼンバーグ
> 
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