Prevent Duplicates in Bash History1 min read

As you may have noticed, bash keeps a history. If you open your terminal and push the up arrow, you’ll see the last command you used. This fills up with duplicates. This is how you ensure it doesn’t keep duplicates.

It’s pretty easy. Just open your terminal and enter:

After that, bash should no longer keep duplicates of previously entered commands. 

See? Linux is pretty simple.

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I'm a retired mathematician that has a fondness for Linux and many (not all) things tech. I'm an old-school geek that just enjoys the life he has. I live in a very, very rural area of Maine.

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