Version 1 (modified by 17 years ago) ( diff ) | ,
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The Little ORBIT Node Linux Interfacer:
How do I get a list of all wireless devices on a node? | find /sys -name wireless -print
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How do I determine the bus of the wireless device with interface named foo0? | ls -l /sys/class/net/foo0/device/bus | sed -e 's#^.*/\([^/]*\)$#\1#'
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How do I get the vendor id of a wireless PCI device with interface named foo0? | cat /sys/class/net/foo0/device/vendor
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How do I get the device id of a wireless PCI device with interface named foo0? | cat /sys/class/net/foo0/device/device
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How do I get the vendor and device id of a wireless USB device with interface named foo0? | cat /sys/class/net/foo0/device/uevent | grep ^PRODUCT | sed -e ' <redacted>'
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Why is the sed expression redacted? | To spare your sanity. |
How do I get the MAC address of a wireless device with interface named foo0? | cat /sys/class/net/foo0/address
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How do I in general query and manipulate the Linux kernel's IP layer? | With ip (hint: -o -f inet ). Not with ifconfig .
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How do I cause a moo without harming a cow? | ip moo
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If an interface is renamed with ip link set foo0 name bar3 , will the above commands still work? | Yes, file names in /sys will change to match the new name, but you will have to re-examine /sys/class/net to pick up changes, and there is no good way to lock against changes from within the kernel. Applications must negotiate changes between themselves.
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How do I get a list of all hard disks on a node? | find /sys/devices -name block:\*
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How do I determine the overall capacity of a hard drive XdaN? | cat /sys/block/XdaN/size
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How do I determine how much physical memory is available? | cat /proc/meminfo | grep MemTotal
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How do I retrieve the serial number of the motherboard? | dmidecode -s baseboard-serial-number
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How do I get a list of all cpus on a node? | ls -d /sys/devices/system/cpu/cpu*
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How do I determine the clock speed of a cpu? | cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
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Do the interface as described above work with any baseline image? | No. Use 2007-12-09 or later. |
Do we have reasonable assurances that the interface as described above will last over the next several incarnations of the Linux wireless stack(s)? | Yes. |
Is there a tool equivalent to ip for wireless interfaces? | iw is not done yet, but when it is done, use it.
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Can we replace a lot of that junk with a more general interface to /sys ? | Yes, but the important thing is to note the 'contract' that certain files in /sys are sure to exist on baseline images in nodes.
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