OpenBSD version 4.5 and above made changes in kernel which prevents booting OpenBSD using KVM technology. OpenBSD 4.4 runs with mbbios enabled. However, due to some sort of bug in KVM it does not boot and hangs while displaying a message which read as “Starting tty flags”. The workaround is to disable mpbios. This may or may not happen with your installation, but if it hanged, use the following procedure.
How do I find out the size of the bss, text segment and data segment for each object or binary file under Linux operating systems?
I am a brand new user of a Linux iptables and I can’t find how to instruct my iptables to delete or unblock an IP address listed in iptables firewall. I’m using Debian Linux version. Can you help please?
Q. How do I find out subnet mask on UNIX operating system? Can you tell us the name of command and configuration file to store subnetmask under UNIX?
A. A subnetwork/ subnet is a range of logical addresses within the address space that is assigned to an organization. Subnetting is a hierarchical partitioning of the network address space of an organization (and of the network nodes of an autonomous system) into several subnets. Routers constitute borders between subnets. Communication to and from a subnet is mediated by one specific port of one specific router, at least momentarily.
Under UNIX / Linux, you need to use the ifconfig utility to assign an address to a network interface
and/or configure network interface parameters. Same command can display subnet. Just type command ifconfig:
$ /sbin/ifconfig interface-name
lnc0: flags=108843 mtu 1500 inet 220.127.116.11 netmask 0xfffffff8 broadcast 18.104.22.168 ether 00:0c:29:32:8a:8c plip0: flags=108810 mtu 1500 lo0: flags=8049 mtu 16384 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet6 ::1 prefixlen 128 inet 127.0.0.1 netmask 0xff000000
Look for inet line you will see an IP address, followed by netmask.
How do I use sprintf() function in a perl script under Linux or UNIX?