One of the most powerful features of the bash shell is the command history . Using the up and down arrows, one can recall the commands typed previously into the shell, edit them, and execute them again, even after rebooting your computer or closing the shell window.
You can also dump the entire history file by typing in the command history. Much, much more can be done using the bash history. These functions can be explored by reading the manual page.
$ man history
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