My OS is Ubuntu 12.04. As System Monitor shows, free for my $HOME is 1.6GiB, but Available is 222.7 MiB and is keeping slowly decreasing from around 750 MiB yesterday. I am not aware that I am adding more data to $HOME. So I would like to know how to find out the reason that causes that, e.g.,is there some running application that is using the space of $HOME as temporary storage place and therefore can be freed up?how to find out which directory or file is increasing its size?To Ignacio~/.xsession-errors is only 21330862 bytes. Some of its last content is > ** (zeitgeist-datahub:2116): WARNING **: recent-manager-provider.vala:133: Desktop file for> file:///windows-d/academic%20discipline/study%20objects/areas/formal%20systems/logic/generalize%20to%20when%20inference%20is%20uncertain/uncertainlize%20deductive%20logic/statistics/general/Kalbfleisch/vol2/all.djvu> was not found, exec: plugin-container, mime_type: image/vnd.djvu> > ** (zeitgeist-datahub:2116): WARNING **: recent-manager-provider.vala:133: Desktop file for> file:///windows-d/academic%20discipline/study%20objects/areas/formal%20systems/logic/generalize%20to%20when%20inference%20is%20uncertain/uncertainlize%20deductive%20logic/statistics/general/Montgomery/prob%20and%20stat%20in%20Eng/4ed.pdf> was not found, exec: plugin-container, mime_type: application/pdfTo Karlson$ df -khFilesystem      Size  Used Avail Use% Mounted on/dev/sda7        21G   15G  4.8G  76% /udev            949M   12K  949M   1% /devtmpfs           383M  988K  382M   1% /runnone            5.0M     0  5.0M   0% /run/locknone            956M  184K  956M   1% /run/shm/dev/sda2        71G   47G   24G  68% /windows-c/dev/sda3       110G  101G  9.9G  92% /windows-d/dev/sda6        27G   26G  223M 100% /home/dev/sda1       1.2G  658M  543M  55% /media/SYSTEM_DRV
Why is the available space in my $HOME decreasing?
ubuntu;home