Bash – How to do the `history` command and not have line numbers so I can copy multiple line commands

I have concluded that it is not possible to append the new commands directly and at the same time to remove any duplicates. So my solution is to run the following command ones in a while. or to put it in my crontab.

tac $HOME/.bash_history | awk '!seen[$0]++' | tac > $HOME/.hist_Temp 
mv $HOME/.hist_Temp $HOME/.bash_history

The above command will keep the last occurrence of a command and remove every other repetitions above it from the history file without messing up the order.

you need to take a look at the bash fc command.

If you want to edit before rexecuting a history line just do like this

fc 123

where 123 is the history line number you see typing the command history.
It will open your favorite editor and allow you to modifiy the line then quit and save and it will run.

You can also do it a range of command like this:

fc 123 135

To work on command history from 123 to 135.

Edit 1:
if you need to run without edit consider watch the post Re-execute fc command from history