The same command is listed in my history again and again. How can I avoid this? I know it's possible via
HISTCONTROL but I haven't found the right way.
bash man page:
A colon-separated list of values controlling how commands are saved on the history list. If the list of values includes
ignorespace, lines which begin with a space character are not saved in the history list. A value of
ignoredupscauses lines matching the previous history entry to not be saved. A value of
ignorebothis shorthand for
ignoredups. A value of
erasedupscauses all previous lines matching the current line to be removed from the history list before that line is saved. Any value not in the above list is ignored. If HISTCONTROL is unset, or does not include a valid value, all lines read by the shell parser are saved on the history list, subject to the value of HISTIGNORE. The second and subsequent lines of a multi-line compound command are not tested, and are added to the history regardless of the value of HISTCONTROL.
So put the following line in your
Stick this in your
You could instead use
ignoreboth. This it shorthand for both
ignorespaces (commands starting with spaces) and
ignoredups on its own as I find the default behaviour of ignoring commands with spaces at the front quite annoying when I copy a command off a website and it doesn't get saved because I accidentally copied in a space too.... But to each their own.
Putting this in
~/.bashrc will apply @alvin's solution across different sessions as wlell
HISTCONTROL=ignoredups:erasedups shopt -s histappend PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"
Add the following to your
To do this, you can use this command:
To uniqely record every new command is tricky. First you need to add to
~/.profile or similar:
HISTCONTROL=erasedups PROMPT_COMMAND='history -w'
Then you need to add to
history -a history -w