a cache stores temporary data nearby so that it can be retrieved much more quickly than fetching it from the real backing store (disk, network), or recalculating some result all over again

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23 views

LDAP double root password

I've changed my LDAP root password following a few guides like this one and this one. I'm in Ubuntu 14.04, and in /etc/ldap/slapd.d/cn=config I've created a subdirectory and placed my ldif file in ...
0
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1answer
20 views

Location or arp cache

I can see my arp cache if I enter arp into the terminal. I want to know the file location of the arp cache in Ubuntu.
1
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0answers
235 views

Why does Firefox ignore the `304 Not Modified` status sent by the webserver?

For my site, Firefox 32.0 seems not to cache a CSS file of my Nikola 7.1.0 installation and ignores the 304 Not Modified response by the webserver. What also puzzles me, is that it sends the 2nd ...
0
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1answer
21 views

Simple html cache for Ubuntu Server 14.10

Which is the best system for html cache in Ubuntu Server? I have some sites in hosting on my dedicated server. I installed and set APC, I enable the cache of Apache. The sites are all made in ...
0
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0answers
19 views

Drowning in cache [closed]

Ubuntu is locking up on me. When I run "free -m" almost all of my ram is in cache. Which I understand isn't technically being "used"...it was free so the system used it for fast read/write.....but it ...
0
votes
0answers
17 views

How to run ExpressCaché on 14.04

I've recently bought a notebook (ASUS K551LN), which comes with a 500GB HDD + 24GB SSD (SanDisk). Thing is, that SSD is supposed to be used as a caché. When I first used the computer (that is, W8), ...
14
votes
4answers
30k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...
1
vote
0answers
84 views

Java applications do not work in Ubuntu 14.04

I have had working Java environment til Yesterday, I cleared my all files and folders in /tmp/ then restarted my computer after that I can not get any Java applications (Chrome, Firefox, Thunderbird, ...
42
votes
4answers
22k views

How do I install and use flashcache/bcache to cache HDD to SSD?

I want to know if there is anyone who has tried installing and running their kernel built with flashcache or bcache for SSD caching? How did you manage to do it?
5
votes
2answers
3k views

How can I clear my cached gpg password?

I've tried: the SIGHUP method --> no succes the cache timeout in gpg-agent.conf --> it seems that this file is not read, althougt I have the 'use-agent' line in gpg.conf What should I do ?
0
votes
1answer
26 views

Installing files from archive cache

How to make a backup of apt archive cache? If I make a backup of the archive cache can I install the applications in the current system to any system, which is running the same OS, using the archive ...
0
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0answers
21 views

DNS Cache server on Ubuntu 12.04

I have configured a Caching and Forwarding DNS server on Ubuntu 12.04 and after whole process things were good. The server was working properly. I tested it using dig command. After rebooting the ...
0
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0answers
25 views

How can I get the extract here option in Nautilus not to cache the file in .cache?

I'm trying to extract a large file in Nautilus, to another partition. I don't have enough memory on my /home directory to store the files. When I click "extract here" in Nautilus, it fails because it ...
-1
votes
1answer
795 views

EnhanceIO: Write-through vs Read-only

I have installed an EnhanceIO SSD cache on my notebook. EnhanceIO supports three caching modes: read-only, write-through, and write-back. Read-only caching mode causes EnhanceIO to direct ...
0
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0answers
9 views

burst internal write-back vs asynchronous internal write-back

What is the difference between burst internal write-back & asynchronous internal write-back?
1
vote
1answer
107 views

Deleted /var/cache

My computer was slowing down, and I saw that deleting /var/log and /var/cache could help, so I did it... I didn't know /var/cache was so important, I tought it would just rebuild itself and deleting ...
45
votes
3answers
35k views

Is it okay to delete ~/.cache?

When I use disk usage analyzer and scan my home folder .cache always shows up with a decent bit of things in it. Would it be okay for me to delete the contents of this folder or would it damage ...
0
votes
0answers
9 views

Is there a filesystem with caching and location-awareness?

Is there a way to setup a filesystem spread on 2 machines A and B in the following way? A and B are not on the same local network. Connecting to any machine shows the same files Writes to any ...
0
votes
0answers
48 views

How to find and report memory leak

When I use any graphics or diagram editing software like Gimp or Dia (and I have tried a couple more) I suddenly find the cache sucking up all my free RAM and cache which slows the system down to a ...
0
votes
0answers
15 views

Looking for a tiered cache solution for data logger

I have a Ubuntu14.04 serving as a traffic logger. Currently, the data are being written to a Ramdisk, and then later synced to a hardware storage. I'm curious if there's a software solution that will ...
0
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0answers
127 views

Already downloaded files are not cached by trafficserver 5.x (caching forward proxy)?

I want to setup Apache trafficserver 5.1.0 installed from source on Ubuntu 14.04 to use a large amount of disk space to preserve large download files as well as web sites (in order to get started I ...
0
votes
0answers
22 views

Difference between System monitor and free -h [duplicate]

I have a Lenovo T430 laptop with 3.7GB of RAM. Since I started using this machine I observe the following strange behavior. If I do a lot of things, say have rails server running, a few nodejs ...
0
votes
0answers
17 views

Can't put content in fastcgi_cache dir

I set up nginx to use the fastcgi_cache parameter. I also set fastcgi_cache_path. And everything works fine. What I tried to do is to manually add a CACHEDIR.TAG file in the fastcgi_cache_path dir in ...
21
votes
5answers
24k views

How do I use zRam?

I installed zRam as described on webupd8.org. I installed it from the terminal. Is that all I have to do or do I have to do some configuration or something? Does the zram-enabler do everything by ...
0
votes
0answers
21 views

How often is the thumbnail cache cleared? [duplicate]

I'm not sure which application is the culprit (Nautilus, with the help of another library, I would assume), but if you take a look at ~/.cache/thumbnails you will notice that Ubuntu stores the ...
1
vote
1answer
37 views
11
votes
3answers
7k views

Computer freezing on almost full RAM, possibly disk cache problem

The problem I think is somewhat similar to this thread. It doesn't matter if I have swap enabled or disabled, whenever the real used RAM amount starts going close to maximum and there is almost no ...
0
votes
1answer
162 views

How to copy all “apt-get update” cache

How can I copy all apt-get update cache to another computer, so that it doesn't need be updated again and again after new installation?
0
votes
0answers
29 views

Clear history of words typed in the dialog run (ALT + F2)? [duplicate]

wanted to erase all the words that remain as an option, every time tightening ALT + F2
0
votes
1answer
142 views

There is a file in ~/.cache/deja-dup/.. with 899G size

I am running my mail server on ubuntu which has 1.2 TB in total space. Today I realized there was an issue on my mail server, it was refusing sending/receiving mails due to storage which triggers ...
2
votes
0answers
111 views

huge cached memory, mostly freez system :(

I have a problem with system memory cache, i think it is bigger than normals. after 5-10 minute of usage, system become unusable and i must restart my "Asus X451-CA" laptop. this command ran upon user ...
22
votes
3answers
8k views

What is safe to exclude for a full system backup?

I'm looking for a list which paths/files are safe to exclude for a full system/home backup. Considering that I have a list of installed packages. /home/*/.thumbnails /home/*/.cache ...
3
votes
3answers
1k views

Why does my system use so much cache?

Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system ...
7
votes
2answers
212 views

Does Ubuntu store data of external media/drives?

I keep confidential data (docs, spreadsheets, images, etc) on USB sticks or discs. I plug/insert them to access the data when I need, and put them back in a drawer when I'm done. Does Ubuntu store ...
4
votes
1answer
224 views

When running locally, does Juju use the host machine's APT cache?

When juju fetches packages for a unit, does it make use of the host system's APT cache? I'm asking this because in my case, bandwidth is limited and I am doing some charm development. It is not ...
5
votes
2answers
743 views

Ubuntu tweak and Mozilla (firefox and thunderbird) cache

I usually use Ubuntu tweak to do cleanup jobs on my PC. This includes apt and program cached data and old kernels. This goes alright for most programs except Mozilla based application - Firefox and ...
0
votes
0answers
26 views

Problem installing packages - Java [duplicate]

I'm having a problem installing Java. It keeps telling me this when it starts to remove outdated cached downloads: Removing outdated cached downloads... sha256sum mismatch jdk-8u5-linux-x64.tar.gz ...
4
votes
1answer
6k views

How do I correctly enable PHP 5.5's OPCache in Ubuntu 14.04?

I'm setting up a local server to test configurations; it's a clean 14.04 LAMP server, as selected during OS install. If I understand correctly, OPCache comes with PHP 5.5 (php -v confirms this) but ...
0
votes
2answers
366 views

Configuring a HTTP and HTTPS web accelerator using Varnish

I have installed and configured varnish on my new server. The server is currently working for http traffic. I would like to also forward SSL traffic to my webserver. It is not necessary to cache this ...
1
vote
0answers
386 views

Can't configure NGINX to cache the images

I have been trying to cache images that are stored in nginx server, I am quite new here and to nginx I have installed it and configure it with php5-fpm, I have been reading many tutorial regarding ...
1
vote
1answer
39 views

More about JuJu cache

I would like to know more about JuJu cache. After I start a charm and JuJu provisions a machine for the first time, the charm will be downloaded and all dependencies installed (apt-get, etc). This ...
3
votes
3answers
13k views

Where does my browser store temporary data?

How can one look at content of temporary cache of his computer ? After something not actually downloaded (just pressing the button to open data not download) to any directory, this data temporarily ...
1
vote
1answer
622 views

Why won't Ubuntu tweak delete my Thumbnail Cache?

In Ubuntu tweak 0.8.7 which is installed in my Ubuntu 14.04 LTS running unity I could not delete a particular file called 'fail' in the thumbnail cache. I am actually trying to remove that file with ...
5
votes
2answers
1k views

Can an external flash or hard drive be used to boost performance, similar to Windows' ReadyBoost?

I have a number of spare external hard disk drives lying about the place and I was wondering if there is any practical way of using an external hard drive or USB flash memory drive to boost ...
0
votes
2answers
34 views

How to update a machine from packages downloaded on a different but similarly configured machine?

I have two laptops with similar configuration. I have updated one and would like to use the cached packages of this to update the other one. I cannot find a way. I did Ctrl+A then Enter but machine ...
1
vote
1answer
2k views

how clear/clean unneeded files or cache for my customized distro

Can you help me to find out how do I clear the Cache files or unnecessary or lib that can be updated on new ubuntu install i used "ubuntu 12.10" this my top size file/folder list: 4380MiB /usr ...
1
vote
1answer
130 views

Know programs in cache

I have this situation with RAM and SWAP at the moment: $ free -h total used free shared buffers cached Mem: 7,7G 7,5G 159M 100M ...
0
votes
1answer
130 views

Should I put /boot on SSD or HDD

I am running Lubuntu 14.04 64bit. I am planning to implement EnhanceIO to use my new 25GB SSD drive for caching my 4TB RAID 0 array. The raid array is partitioned as: 500MB /boot, 20GB /, 200GB ...
2
votes
1answer
665 views

Clear .cache tracker directory in ubuntu?

I created a partition for Ubuntu and I just ran out of space a couple days ago. I used the Disk Usage Analyzer and I realized that for some reason the directory /home/.cache uses up a lot of disk ...
2
votes
0answers
403 views

Error while updating via terminal from Ubuntu 12.10 to Ubuntu 13.04

I get this error multiple times (and these codes underneath still run for some reason) This likely means that your installation is broken. Try running the command: gdk-pixbuf-query-loaders > ...