What does history mean in the Bash command line?
The command itself is a bash built-in. This simply means that history exists inside the bash program itself, /bin/bash. Using the command type, which is also a shell built-in, we can see that history is, in fact, a shell built-in. This is shown in the output, like this:
Why does Bash not keep history in Ubuntu?
I run Ubuntu 12.04, and for some reason bash does not keep my command history. the ~/.bash_history file contains only 3 commands that I typed a few months ago. How can I fix this?
What does histfilesize do in the Bash history file?
HISTFILESIZE: The variable contains the maximum number of lines that may be in the history file. When bash writes to the history file, the oldest commands that go over this maximum number get deleted. HISTSIZE: Does the same as above, but controls the maximum lines of current session history to maintain in RAM.
How to clear the history file in Bash?
The history command. This will not clear the contents of the file, only the current session history; however if histappend is disabled, then exiting from the shell will overwrite the file with the current session history. Of course, if the session history is empty, then, on exit, we will have effectively cleared the history file.
How to reuse a command from the history list?
If you want to reuse a command from the history list, type an exclamation point (!), and the number of the command with no spaces in-between. For example, to repeat command number 37, you would type this command: !37
How to retrieve previously entered commands in Bash?
Thankfully, there are other ways to retrieve previously entered commands: We would first copy the /mnt/sales/fred.xml to /data/fred.xml, then edit the last argument with vi . The last argument being, in this case, /data/fred.xml. Now, let’s read on and see why it so important to make sure that we store only relevant information in our history.