ETHERS(5) BSD File Formats Manual ETHERS(5)NAME
ethers -- Ethernet host name data base
DESCRIPTION
The ethers file maps Ethernet MAC addresses to host names. Lines consist of an address and a host name, separated by any number of blanks
and/or tab characters. A '#' character indicates the beginning of a comment; characters up to the end of the line are not interpreted by
routines which search the file.
Each line in ethers has the format:
ethernet-MAC-address hostname-or-IP
Ethernet MAC addresses are expressed as six hexadecimal numbers separated by colons, e.g. "08:00:20:00:5a:bc". The functions described in
ethers(3) and ether_aton(3) can read and produce this format.
The traditional use of ethers involved using hostnames for the second argument. This may not be suitable for machines that don't have a com-
mon MAC address for all interfaces (i.e., just about every non Sun machine). There should be no problem in using an IP address as the second
field if you wish to differentiate between different interfaces on a system.
FILES
/etc/ethers The ethers file resides in /etc.
SEE ALSO ethers(3)HISTORY
The ethers file format was adopted from SunOS and appeared in NetBSD 1.0.
BUGS
A name server should be used instead of a static file.
BSD November 7, 2000 BSD
Check Out this Related Man Page
ethers(4) File Formats ethers(4)NAME
ethers - Ethernet address to hostname database or domain
DESCRIPTION
The ethers file is a local source of information about the (48-bit) Ethernet addresses of hosts on the Internet. The ethers file can be
used in conjunction with or instead of other ethers sources, including the NIS maps ethers.byname and ethers.byaddr, the NIS+ table ethers,
or Ethernet address data stored on an LDAP server. Programs use the ethers(3SOCKET) routines to access this information.
The ethers file has one line for each host on an Ethernet. The line has the following format:
Ethernet-address official-host-name
Items are separated by any number of SPACE and/or TAB characters. A `#' indicates the beginning of a comment extending to the end of line.
The standard form for Ethernet addresses is "x:x:x:x:x:x" where x is a hexadecimal number between 0 and ff, representing one byte. The
address bytes are always in network order. Host names may contain any printable character other than SPACE, TAB, NEWLINE, or comment char-
acter.
FILES
/etc/ethers
SEE ALSO ethers(3SOCKET), hosts(4), nsswitch.conf(4)SunOS 5.10 22 Jul 2004 ethers(4)
hi,
i wanted to know how to change the MAC id of the machine i`m using.. I know the MAC is permanent n on the ROM, but i wanted to know if there was any way to change it during tht particular session..
also.. if it was possible.. could it be kept changed for sometime...? (8 Replies)
Hey guys i need to take the MAC address in the format of
0x00255T08D433
and convert it to
00:25:5T:08:D4:33 (it goes :08: D4:33 with no space the forum is making it a big smiley)
for a script i am working on. I am Not quite sure where to start with this one any help would be... (4 Replies)
Hi,
I've got a Sun Solaris machine with host ID (840f8e57) and MAC address (0:14:4f:f:8e:57), how do I:
1. Write the MAC address in standard (IEEE 802) format, i.e. xx-xx-xx-xx-xx-xx? Do I need to add 0's before or after the 'f', i.e. 00-14-4f-0f-8e-57 or 00-14-4f-f0-8e-57?
2. What is... (4 Replies)
Hi there
I am running a script which requires the input of a MAC address from the user and was loooking for a regex that will verify the user has inputted a full 12 digit valid MAC with colons
Ive seen a few on some sites that look huge and was wondering if anybody had a one liner (or as... (21 Replies)
Ok here is the problem we have 2 v440 with same IP address running solars 9. one remains on the other remains off. They are both configured exactly the same for redundant purposes for the software we use. This was the best/worst idea. Great because down time is only a mere minutes. The bad is the... (7 Replies)
Hi,
i am working on a project where i have to write a script to find out MAC addresses of the systems with given IP address.
Can anybody tell me which command i can use to find MAC address if you know IP address of the machine.
Thanks (5 Replies)
I m having interface ce0 ce1 and its sub interfaces for that.
I want to give MAC addresses for the same.
How will I assign it.
Please give solution for the same (4 Replies)
hi,
I have written a script to search MAC address in a given directory.
MAC address would be in format XX.XX.XX.XX.
The digits contain hexadecimal numbers.
For this i have used grep as follows.
grep -rn '^\{1,2\}\.\{1,2\}\.\{1,2\}\.\{1,2\}\$' *
This is not working as required.... (17 Replies)
I need to find the MAC address of the ethernet cards on the host machine from the C language. I have found a way to do this on Linux using socket(), ioctl() and the ifreq structure. But this does not seem to work on AIX, HP/UX and probably the others I need (Solaris, SCO, Alpha etc).
Is there a... (7 Replies)
I have a ksh script and would like to validate a MAC address that is input by the user:
00:14:4F:FC:00:49
example:
MAC=`/usr/bin/ckint -p "Enter MAC address"`
echo $MAC
echo " "
Obviously chkint will not work, but does anyone have any suggestions?
Thanks (9 Replies)
Hello,
I am new to Linux. I have just purchased Apple MACPRO with 12 core, 32 GB RAM, 2TB hard drive, MAC OS Lion installed. I want to install Linux server on this machine.And can I run both MAC OS Lion and Linux Server side by side ? Can I put all my data at one place and use that data from any... (5 Replies)
Hi,
For som reason i need to change MAC address of SCO Open Server 5.0.6.
I have searched foe answer too much but i didn't fin any thing well.:mad:
Please help me,
Thx:cool::) (4 Replies)
Hi Everybody,
Goal:
From my backup box on my local network, knowing the Wifi MAC address of my laptop, I would like to dynamically identify which ip address is attributed to my laptop.
The aim is to store this ip address in a local variable and that this information is retrieved by another... (11 Replies)
Hy every body,
Unfortunately and without success, i want to write a bash script who maps a known IP addess to a known MAC address using iptables and for the FORWARD chain.
Within the DHCP server, i have assigned a fixed IP address to all clients based on their MAC addresses of their... (11 Replies)
Hy over there,
Lets make it simple :)
Using a bash script, how to grep only the ip address and the mac address and put them in a file:.
for example from the dhcp.conf file we got such things:
The script will end up with two columns IP's and MAC adresses as it is showed below:
... (9 Replies)