07-16-2008
Match a specific IP range
Hello all,
I would like a bit of help with a problem I am having. I have the following example file:
$ cat test_hosts
10.10.2.3 host1
10.10.2.4 host2
10.10.2.130 host3
10.10.2.5 host4
10.10.2.230 host5
10.10.2.22 host6
I need to match all IP addresses in the 10.10.2.1-10.10.2.22 range. I have tried all kind of things but for the life of me, I can't get it to work.
$ cat test_hosts | egrep "10\.10\.2\.[1,22]\s"
This shows nothing.
$ cat test_hosts | egrep "10\.10\.2\.[1,22]"
10.10.2.130 host3
10.10.2.230 host5
10.10.2.22 host6
Not exactly what I need. What am I doing wrong ?
Thanks,
Sylaan
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LEARN ABOUT ULTRIX
ethers
ethers(5) File Formats Manual ethers(5)
Name
ethers - database that maps Ethernet addresses to hostnames
Description
The file is used in conjunction with the reverse address resolution protocol daemon, to map Ethernet addresses to hostnames. It contains
information about the known (48-bit) Ethernet addresses of hosts on the Internet.
For each host on an Ethernet, a single line should be present in the file with the following information:
Ethernet-address official-host-name
Items are separated by one or more spaces or tabs. A number sign (#) indicates the beginning of a comment that extends to the end of line.
The standard form for Ethernet addresses is:
x:x:x:x:x:x
The x is a hexadecimal number between 0 and ff, representing 1 byte. The address bytes are always in network order.
Hostnames can contain any printable character other than a space, tab, newline, or number sign (#).
Hostnames in the file should correspond to the hostnames in the file or to those provided by the name service.
Examples
The following is a sample file: 08:00:20:01:e5:1c host1 # Comments go here 08:00:20:01:d0:4c host2 # Comments go
here 08:00:20:01:e0:1d host3 # Comments go here 08:00:20:00:c2:4e host4 # Comments go here
See Also
ethers(3n), hosts(5), rarpd(8c)
Introduction to Networking and Distributed System Services
ethers(5)