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$ dmesg # lshw
# cat /proc/interrupts # cat /proc/cpuinfo
# ps ... 17399 pts/0 00:00:00 bash ... # cat /proc/17399/cmdline -bash # tty /dev/pts/0 # ls -l /proc/17399/fd/0 lrwx------ 1 root root 64 Oct 25 16:43 /proc/17399/fd/0 -> /dev/pts/0
http://citkit.ru/articles/367/
http://ru.wikipedia.org/wiki/Sysfs
# cat /sys/class/net/enp0s3/address 00:0c:29:d2:6a:d3
http://ru.wikipedia.org/wiki/Udev
# ls -l /dev/ttyS0