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I have Ubuntu 12.04 lts.

I want to know that if there is a command other than:

sudo apt-get autoremove

to remove temp files?

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closed as unclear what you're asking by Avinash Raj, souravc, BuZZ-dEE, Ask, i08in Mar 13 at 12:04

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1  
possible duplicate of Unity runs slow, how can I improve its performance? –  Danatela Mar 12 at 9:38
    
please ask a clear question. –  Avinash Raj Mar 12 at 9:42
    
what's your RAM size?what's you swap partition size? –  Avinash Raj Mar 12 at 9:47
    
in system moniter it says : Memory: 7.0 GiB && Processor: AMD A6-5350M APU with Radeon(tm) HD Graphics × 2 –  Jatttt Mar 12 at 11:40
    
post the output of lsblk command. –  Avinash Raj Mar 12 at 11:48

3 Answers 3

You can use Ubuntu-tweak (see http://ubuntu-tweak.com/downloads/) to clean your Ubuntu installation ;)

If you have an SSD hard drive, you should also run sudo fstrim -v / at least once a week to trim your hard drive.

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Try the below command to remove temp files,

sudo rm -rf /tmp/*

apt-get autoremove will remove automatically all unused packages.

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did not help. Already tried sudo apt-get autoremove –  Jatttt Mar 12 at 9:46
    
Remove all the files inside /tmp directory. –  Avinash Raj Mar 12 at 9:47
    
is that safe to do ? –  Jatttt Mar 12 at 9:51
    
it's all temporary files.After you restart your pc, it won't exists there.You can check it. –  Avinash Raj Mar 12 at 9:52
    
the directory is empty but my laptop is still slow –  Jatttt Mar 12 at 9:54

Slow ubuntu may not be because of low disk space. Is this a recent problem? (i.e was it signficantly faster before?) If not:

  1. run free -m and post the results.

    $free -m
                 total       used       free     shared    buffers     cached
    
    Mem:          5812       4919        892          0        164        822
    -/+ buffers/cache:       3932       1879 
    Swap:         9050       2076       6973
    

    If the -/+ buffers/cache: xxx yyy line has very little free memory (yyy <150) then you might be short of ram. This line is the one that tells you what the actually used/free memory is. (The first line is a bit misleading because it also counts spare ram that was used to pre-cache files as used).

    1.1 if you are short of ram (and you had at least 1GB in total) open the system monitor form the dash and arrange the processes in by memory usage. see if any process is taking up too much memory and try killing it. A usual culprit is zietgeist.

  2. find out if any processes are hogging the CPU

  3. Do you have a graphics card hat can handle unity? (it needs hardware acceleration for it's perfectly purple pixels) You might need to install the necessary drivers (search for "drivers" in the dash and run the application that is suggested.

    If you dont have a dedicated graphics card you need to have a core-i processor from intel. (e.g. i3 and above. they have a tiny integrated graphics processor).

    3.1 If you dont have a graphics card and/or you can't set up the drivers you will need to make unity a little easier on the CPU. follow the instructions here to drop some unecessary bling (Unity runs slow, how can I improve its performance?)

    3.2 alternatively install a lighter DE like XFCE or LXDE. This will make a world of a difference on older machines.

Finally: if you have oodles of RAM and are just plain impatient with opening files install ureadahead. It finds the files you read the most often and loads them into ram, so they appear to open faster.

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total used free shared buffers cached Mem: 7177 2202 4974 0 110 975 -/+ buffers/cache: 1117 6059 Swap: 7810 0 7810 This Is The Output Of free -m –  Jatttt Mar 12 at 11:37
    
definitely fot lots of ram. With that kind o a set up I suspect graphics card issues. do you have a discrete graphics card? nvidia /amd/ ati? If so open the driver manager from the dash and see if it suggests the proprietary drivers. –  staticd Mar 12 at 12:02
    
There is no app called drive manager –  Jatttt Mar 14 at 12:50
    
type "driver" or "jockey" one or both of them will show you an icon saying "additional drivers" or some such. search for any necessary drivers through it. –  staticd Mar 14 at 18:25

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