Commands entered with a leading space are typically not stored in bash's history. This is a feature: if you want bash not to put a command in history, such as a dangerous command like
rm -rf ..., place a space in front of it. Also, duplicate commands may be ignored.
This behavior is configurable with the
HISTCONTROL variable. From
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 ignoredups causes lines
matching the previous history entry to not be saved. A value of ignoreboth is shorthand for ignorespace and ignoredups. A value of
erasedups causes all previous lines matching the current line to be removed from the history list before that line is saved. Any value
in the above list is ignored. If HISTCONTROL is unset, or does not include a valid value, all lines read by the shell parser
saved on the history list, subject to the value of HISTIGNORE. The second and subsequent lines of a multi-line compound
are not tested, and are added to the history regardless of the value of HISTCONTROL.
To see how your shell is configured, run:
To change to a new setting, edit your