Nov 1, 2018

Bash History Builtins - history commands


history [n]
history -c
history -d offset
history [-anrw] [filename]
history -ps arg
With no options, display the history list with line numbers. Lines prefixed 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 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. Options, if supplied, have the following meanings:
Clear the history list. This may be combined with the other options to replace the history list completely.
-d offset
Delete the history entry at position offsetoffset should be specified as it appears when the history is displayed.
Append the new history lines (history lines entered since the beginning of the current Bash session) to the history file.
Append the history lines not already read from the history file to the current history list. These are lines appended to the history file since the beginning of the current Bash session.
Read the current history file and append its contents to the history list.
Write out the current history to the history file.
Perform history substitution on the args and display the result on the standard output, without storing the results in the history list.
The args are added to the end of the history list as a single entry.
When any of the -w-r-a, or -n options is used, if filename is given, then it is used as the history file. If not, then the value of the HISTFILE variable is used.