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When I woke up this morning, I found my root had filled overnight

du -hx --max-depth=1 /

132M    /boot  
4.0K    /media  
16K /lost+found  
16M /root  
702M    /lib  
4.0K    /OLDHOME  
8.2G    /usr  
73M /etc  
4.0K    /srv  
11M /sbin  
4.0K    /selinux  
8.0K    /.config  
4.0K    /cdrom  
4.6G    /var  
181M    /opt  
4.0K    /mnt  
9.3M    /bin  
4.0K    /lib64  
14G /  

The space is used by /var/cache/polipo (2.7G). How can I clean this up safely?
I tried restarts=>didn't work
Used bleachbit=>the space is not detected in the cleanup preview

PS: I did rm -rf youtube inside /var/cache/polipo and it freed up 2G space. Dunno if it was safe though

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whats that polipo ? – Raja Oct 29 '13 at 0:45
polipo is a caching proxy – v3ga Oct 29 '13 at 2:12

Method 1:

sudo apt-get autoclean
sudo apt-get autoremove

Method 2:

Launch your bleachbit as root user : no space in disk; sudo apt-get clean not working

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All these were already done. The problem is in /var/cache. I want to know how to clean /var/cache safely. – v3ga Oct 29 '13 at 2:13

Try cleaning ubuntu unnecesarry files using bleachbit. It is a tool that will help you clean your cache, temp files, cookies and it has other features also...

To install it:

sudo apt-get install bleachbit
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