For some unknown reason there is no space left on my /, even 5 minutes after removing 300 MBs of junk packages, there is no space left again. So I've come to conclusion that there is some process that floods my disk space. (--> Recently I installed docker).How can I find which process produces most data on /?
How to find which process is currently writing to the disk?
monitoring;disk usage;audit
Your best bet is probably iotop:   iotop  watches  I/O  usage  information  output  by  the  Linux  kernel   (requires 2.6.20 or later) and displays a table of current I/O usage by   processes   or   threads   on   the   system.   At   least   the   CON   FIG_TASK_DELAY_ACCT,  CONFIG_TASK_IO_ACCOUNTING,  CONFIG_TASKSTATS  and   CONFIG_VM_EVENT_COUNTERS  options need to be enabled in your Linux ker   nel build configuration.Assuming your process is doing a lot of I/O operations, it should show up pretty high in that list.