$> cat infile
lalala
here is a mac address 00.30.05.be.c5.bc ok?
rubbish
here is not a mac address 00.30.0s.be.c5.bc ok?
another 00.30.05.be.c5.b1 ok?
litter
$> grep -i '[0-9A-F]\{1,2\}\.[0-9A-F]\{1,2\}\.[0-9A-F]\{1,2\}\..*' infile
here is a mac address 00.30.05.be.c5.bc ok?
another 00.30.05.be.c5.b1 ok?
After adding the 2nd dot there was no problem anymore.
Hi,
Actually i have written one test.sh (shell program) in bash.
Here i have a variables $a which stored the value package1.
Now I want to write a regular expression inside the if command that "if $a variable contains letter p in the begining of the value package1 then it is coming true.... (5 Replies)
In Perl I can write a condition that evaluates a match expression like this:
if ($foo =~ /^bar/) {
do blah blah blah
}
How do I write this in shell? What I need to know is what operator do I use? The '=~' doesn't seem to fit. I've tried different operators, I browsed the man page for... (3 Replies)
Hi,
I have script which will take a string as input and search in a file.
But when I want to search a pattern which has special characters script is ignoring it.
For example: I want to search a pattern "\.tumblr\.com". shell script is removing \ (backslah) and trying to search... (7 Replies)
Dear all,
I have a specific problem that I don't quite understand how to solve. I have two files, both of the same format:
XXXXXX_FIND1 bla bla bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
========
(return)
XXXXXX_FIND2 bla bla bla
bla
bla
bla (10 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
hi
i am trying to extract some specific data out of a text file using regular expressions with shell script
that is using a multiline grep .. and the tool i am using is pcregrep so that i can get compatibility with perl's regular expressions
for a sample data like this, i am trying to grab... (6 Replies)
Hello All,
I'm trying to extract the lines between two consecutive elements of an array from a file.
My array looks like:
problem_arr=(PRS111 PRS213 PRS234)
j=0
while } ]
do
k=`expr $j + 1`
sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt
---some operation goes... (11 Replies)
I do have a shell file where I call many unix commands . I would like to add a regular expression step in that shell file, where a text file, say Test.txt has to be openned and all the :'s should be replaced.
Basically apply the follwoing regular expression:
:%s/://g
to that particular text... (2 Replies)
If i do below command in unix prompt which static values (ie 27..97), it is working fine and gives desired output
>ls -d $WORKDIR/batch/somefilename_{27..97}.* 2>/dev/null
somefilename_27.sometxt
somefilename_28.sometxt
somefilename_29.sometxt
..
somefilename_97.sometxt
But if i want... (2 Replies)
Discussion started by: haiderali
2 Replies
LEARN ABOUT NETBSD
ethers
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
07-26-2010
