Category Archives: linux

OpenSUSE 11 and SLES 11 Enable Multiple Kernel Support for zypper

Posted on April 2, 2012 by admin

By default, when zypper upgrades your kernel, it treats the package like any other package. The old kernel is removed and the new kernel is installed. There are three ways to get your old kernel back (or keep it). You … Continue reading →

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HOWTO Redirect Linux Console Without Reboot

Posted on October 3, 2011 by admin

You can re-apply your /etc/inittab file in real-time without rebooting your machine. This allows you to do a lot of neat things, such as redirect your system console to the serial port without a reboot. Edit your /etc/inittab file and … Continue reading →

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Linux HOWTO Enable Miltucast Ping (ICMP) Replies (Echo)

Posted on April 21, 2011 by admin

The 2.6 Linux kernel does not respond to multicast ICMP Echo requests by default. This is a setting in /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts Test it: # cat /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts 1 # Set it to 0 for ping replies: # echo “0” > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts # … Continue reading →

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