In recent CentOS version 6.3 is an unresolved bug, which causes the network card to freeze the server. Following message appears in /var/log/messages kernel To work around the problem you will need to turn off Active-State Power Management (ASPM) (Feature that saves power in the Peripheral Component Interconnect Express (PCI Express or PCIe) subsystem by…
Setting up a listener in UDP : Install socat Jist here (Centos 6.6 : http://jist.sudoall.com/socat/setup install curl “http://jist.sudoall.com/socat/setup” | bash – socat -u udp-recv:8888 – To send the datagram : nc -u 127.0.0.1 8888 njoy 😉
The “magic SysRq key” provides a way to send commands directly to the kernel through the /proc filesystem. It is enabled via a kernel compile time option, CONFIG_MAGIC_SYSRQ, which seems to be standard on most distributions. First you must activate the magic SysRq option: echo 1 > /proc/sys/kernel/sysrq When you are ready to reboot the…
