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The fact that the login UID doesn't change after sudo or su is the whole point of a having login UID, separate from the real and effective UIDs. It's meant for logging purposes. Neither the login UID nor any other UID of a process has a direct impact on a process's limits or performance. Limits are set by the program that logs you in. After that, they are ...


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What you want is in this answer and this answer The only thing I'll add is the -u user option for ps eg: ps -u <username> to search processes started by a user.


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LVM is not overkill if you have 17 partitions. (IMHO) As for the partition limit, it just happens to be the default. Probably no one expected that many partitions on a device that used to have only a few megs. /usr/src/linux/Documentation/devices.txt: 179 block MMC block devices 0 = /dev/mmcblk0 First SD/MMC card ...


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I am not familiar with jailkit so I am not sure about the exact details to implement this, but you could use sluice (http://kernel.ubuntu.com/~cking/sluice/) to rate limit the traffic. A simple solution could be to replace the rsync binary in the user chroot environment with a trivial shell script like: #!/bin/sh -e rsync "$@" | sluice ...


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Sounds like user wouldn't voluntarily play nice and use --bwlimit each time they invoke rsync. --bwlimit=RATE limit socket I/O bandwidth iptables approach may be covered by this question+answer: serverfault.com: how can I limit per user bandwidth?



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