代码： 全选
xyz@benben:~$ ps xao pid,comm | head
PID COMMAND
1 init
2 kthreadd
3 ksoftirqd/0
5 kworker/0:0H
7 rcu_sched
8 rcuos/0
9 rcuos/1
10 rcuos/2
11 rcuos/3
xyz@benben:~$
恩, 是upstart启动的.
问题又来了, virtualbox 中, 客户机无法使用usb设备的问题.
代码： 全选
12.7.7 USB not working
If USB is not working on your Linux host, make sure that the current user is a member of the
vboxusers group. On older hosts, you need to make sure that the user has permission to access
the USB filesystem ( usbfs ), which VirtualBox relies on to retrieve valid information about your
host’s USB devices. The rest of this section only applies to those older systems.
As usbfs is a virtual filesystem, a chmod on /proc/bus/usb has no effect. The permissions
for usbfs can therefore only be changed by editing the /etc/fstab file.
For example, most Linux distributions have a user group called usb or similar, of which the
current user must be a member. To give all users of that group access to usbfs, make sure the
following line is present:
# 85 is the USB group
none
/proc/bus/usb
usbfs
devgid=85,devmode=664
0
0
Replace 85 with the group ID that matches your system (search /etc/group for “usb” or similar).
Alternatively, if you don’t mind the security hole, give all users access to USB by changing “664”
to “666”.
The various distributions are very creative from which script the usbfs filesystem is mounted.
Sometimes the command is hidden in unexpected places. For SuSE 10.0 the mount command
is part of the udev configuration file /etc/udev/rules.d/50-udev.rules . As this distribution
has no user group called usb , you may e.g. use the vboxusers group which was created by
the VirtualBox installer. Since group numbers are allocated dynamically, the following example
uses 85 as a placeholder. Modify the line containing (a linebreak has been inserted to improve
readability)
DEVPATH="/module/usbcore", ACTION=="add",
RUN+="/bin/mount -t usbfs usbfs /proc/bus/usb"
and add the necessary options (make sure that everything is in a single line):
DEVPATH="/module/usbcore", ACTION=="add",
RUN+="/bin/mount -t usbfs usbfs /proc/bus/usb -o devgid=85,devmode=664"
Debian Etch has the mount command in /etc/init.d/mountkernfs.sh . Since that distribu-
tion has no group usb , it is also the easiest solution to allow all members of the group vboxusers
to access the USB subsystem. Modify the line
domount usbfs usbdevfs /proc/bus/usb -onoexec,nosuid,nodev
so that it contains
domount usbfs usbdevfs /proc/bus/usb -onoexec,nosuid,nodev,devgid=85,devmode=664
As usual, replace the 85 with the actual group number which should get access to USB devices.
Other distributions do similar operations in scripts stored in the /etc/init.d directory.
这是从手册上找到的... 但是ubuntu 没有/proc/bus/usb 文件夹...
终于知道为什么 我使用不了usb了.........