How can I see all of the bash history?

Question

First let me show an example below.

In shell(1) I did the following command.

$ ping google.com
PING google.com (74.125.235.164) 56(84) bytes of data.
64 bytes from nrt19s12-in-f4.1e100.net (74.125.235.164): icmp_seq=1 ttl=54 time=2.85 ms
64 bytes from nrt19s12-in-f4.1e100.net (74.125.235.164): icmp_seq=2 ttl=54 time=3.42 ms

And after that, open another shell(2) and look at history.

$ history
 .
 .
 .
 8720  exit
 8721  clear
 8722  history

In this case, the shell can not see the history executed by shell(1), but I want to see all of the bash history in every shell.

So my question is how can I see all of the bash history? Does anybody know how to hack?

Thank you very much in advance!

Answer 1

cat ~/.bash_history

would also work, although I tend to just use

vim ~/.bash_history 

and then use /to search

Answer 2

You should look into the histappend shell option and the -a flag to history:

histappend

If set, the history list is appended to the file named by the value of the HISTFILE variable when the shell exits, rather than overwriting the file.

history

-a Append the "new" history lines (history lines entered since the beginning of the current bash session) to the history file.

If you put history -a into your PROMPT_COMMAND, you'll get an always-up-to-date .bash_history file.

Answer 3

try this:

Edit your .bashrc and append this to it's end:

shopt -s histappend
PROMPT_COMMAND="history -n; history -a"
unset HISTFILESIZE
HISTSIZE=2000

source: http://subbass.blogspot.com.br/2009/10/howto-sync-bash-history-between.html