nemo is a file manager for Linux, see here.

I would recommend you try and find out what is causing your tmp folders to fill up, in the first place, as your going to continue to have the same problem, unless you can pin point the cause of it.

You should be able to delete, whichever files are not in use from your /tmp folder and possibly (depending on your distro) ~/tmp folder.

Hope this helps.

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As a start you could boot into a recovery CD/DVD and then mount your system and delete everything in /tmp for start.

As jsbjsb001 said you need to find out what is filling up your /tmp directory.

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If your not sure how to go about finding out what might be causing your /tmp folder to be filling up, try the following commands;

This *might* give us some clue, as to what *might* be causing your /tmp folder to fill up.

Run this and post the output - it will require your password, and may take minutes (minutes, not seconds) to complete, so wait.

Your hard drive is only 40% full. Your hard drive is not "filling up" and is probably not the reason why your computer is running slow. It is perfectly normal for Linux to create various temp, cache, and log files. In my opinion, there is no benefit (and likely great risk) for a user such as yourself to run the file manager as "root" and delete system files.

Here is a better approach, in my opinion:

1. Tell us about your hardware (computer brand, model, CPU, RAM, hard drive, graphic card, and any other details you think might be relevant).
2. When your computer is running slow, use built in Linux tools like System Monitor to analyze the reason why. Is your hard drive full? Is your CPU running near 100%? Is your RAM filling up and the system is using swap instead?
3. Upgrade your hardware if necessary. For example, you could quadruple your storage by purchasing a 2TB hard drive for under $100.

I would suggest you post the output of the commands, listed in posts #4 and #5 as well as the following one below, failing that;

As let's not confuse things anymore than they already are, and take one thing at a time.

If you want to see how much is in each linux partition, enter the following command into a terminal screen:This will give you partition size and % usage. You will get an instant answer.

If you have a lot of rubbish files, they are likely in the rubbish bin - which you can empty.
If you have files in /tmp, a reboot will automatically remove them.
There are a few other cache files - but they are there to speed up your computer.

Concur (pls. post as well the output of the command "mount" and tell us pls. if you're using a HDD or a SSD).
And btw. I didn't understand 1) what becomes slow and 2) why everybody is focusing on "/tmp" (as it isn't mentioned in the root post...).
Cheers!

this might help
https://sites.google.com/site/easylinuxtipsproject/4

is many times a ramdrive, in memory. I think your tech was speaking in a very broad sense, and leading you to nemo as a red herring. You're probably filling up with log files in /var/log. You might nave a VERY LOW Logging level that creates huge files.

You can use find:will find all files larger than 10MB in /var/log. You get the basic idea. You might also try running that command on /home. The entire physical drive does not have to fill up to cause stalls.

If one partition fills up, on a multi--partition system--it can cause problems. I hope this helps.

Agree with AwesomeMachine, check /var/log from my experience this is one of the culprit.

Good luck!