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linuxshellhistorytcsh

how can I filter out same commands in tcsh history

I am using tcsh. But annoyed by same command stored in history file. I have to use multiple times of up arrow to bypass the same command, very inconvenient. Can anyone give some help to solve this inconvenience.

Solution

  • There's the histdup setting for this; from tcsh(1):

       histdup (+)
           Controls handling of duplicate entries in the history list.  If
           set to `all' only unique history events are entered in the
           history list.  If set to `prev' and the last history event is
           the same as the current command, then the current command is
           not entered in the history.  If set to `erase' and the same
           event is found in the history list, that old event gets erased
           and the current one gets inserted.  Note that the `prev' and
           `all' options renumber history events so there are no gaps.