try: ‘ history -c ‘
more at : man history OR man bash
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history [n]
history -c
history -d offset
history -anrw [filename]
history -p arg [arg ...]
history -s arg [arg ...]
With no options, display the command history list with line numbers.
Lines listed with a * have been modified. An argument of n lists only the
last n lines. If the shell variable HISTTIMEFORMAT is set and not null,
it is used as a format string for strftime(3) to display the time stamp
associated with each displayed history entry. No intervening blank is
printed between the formatted time stamp and the history line. If file-
name is supplied, it is used as the name of the history file; if not, the
value of HISTFILE is used. Options, if supplied, have the following mean-
ings:
-c Clear the history list by deleting all the entries.
-d offset
Delete the history entry at position offset.
-a Append the ‘‘new’’ history lines (history lines entered since the
beginning of the current bash session) to the history file.
-n Read the history lines not already read from the history file into
the current history list. These are lines appended to the history
file since the beginning of the current bash session.
-r Read the contents of the history file and use them as the current
history.
-w Write the current history to the history file, overwriting the his-
tory file’s contents.
-p Perform history substitution on the following args and display the
result on the standard output. Does not store the results in the
history list. Each arg must be quoted to disable normal history
expansion.
-s Store the args in the history list as a single entry. The last
command in the history list is removed before the args are added.
If the HISTTIMEFORMAT is set, the time stamp information associated with
each history entry is written to the history file. The return value is 0
unless an invalid option is encountered, an error occurs while reading or
writing the history file, an invalid offset is supplied as an argument to
-d, or the history expansion supplied as an argument to -p fails.
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