Visit Our UNIX and Linux User Community


bash: convert mac address to 16 character format


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting bash: convert mac address to 16 character format
# 1  
Old 10-29-2009
bash: convert mac address to 16 character format

Hi there

Im not quite sure how i can do this, but i am retrieving the mac address from boxes, which in some instances is arriving in its shortened format (i.e. dropping the leading zeros)... for example


0:3:BA:1:E:84


Im trying to figure out a way of converting the single character fields to have a trailing zero, so that i can get a full 16 character (plus colons) format

so like this

00:03:BA:01:0E:84


I started doing this and it soon turned in to an almighty and unweildy 'for loop' which, whilst im sure i could finish to get the job done properly, would be far to complicated

Do any of you guys know if there are any awk/perl one liners out there that i can use to do this ?

any help would be great
# 2  
Old 10-29-2009
With awk you can do something like:

Code:
awk -F: '{printf("%02s:%02s:%02s:%02s:%02s:%02s",$1,$2,$3,$4,$5,$6)}'

# 3  
Old 10-29-2009
thats great thank you
# 4  
Old 02-11-2010
something to modify

Is there anyone here that can help me with docsis.level script?I want something like this:


when i extract information from modems it will show me cpe table in decimal format(0000.0000.0000).I want to print cpe table values in hexa format(00:00:00:00:00:00).
I was trying wih
Net::MAC perl extension,but i am not to good in perl.
Please help.Thanks

Previous Thread | Next Thread
Test Your Knowledge in Computers #540
Difficulty: Medium
In dynamically typed programming languages. instead of declaring a variable to have a particular type, the type of a variable is determined by an A.I. in the operating system.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash script who maps IP with MAC address

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)
Discussion started by: hermouche
11 Replies

2. IP Networking

MAC Address - Four Interfaces with the same MAC Address

four interfaces with ifconfig all interfaces have the same mac. If is not set for unique. but it still works. what difference does it make to have all macs the same or different? (4 Replies)
Discussion started by: rrodgers
4 Replies

3. Shell Programming and Scripting

perl module to convert xlsx format to xls format

Hi Folks, I have written a perl script that reads data from excel sheet(.xls) using Spreadsheet::ParseExcel module. But the problem is this module doesn't work for excel sheets with extension .xlsx. I have gone through Spreadsheet::XLSX module with which we can read from .xlsx file directly.... (1 Reply)
Discussion started by: giridhar276
1 Replies

4. IP Networking

Tracing a MAC address to IP address: Solaris

Hi there I lost connectivity to one of our remote systems and when I checked the messages log I found the following: Aug 10 23:42:34 host xntpd: time reset (step) 1.681729 s Aug 16 13:20:51 host ip: WARNING: node "mac address" is using our IP address x.x.x.x on aggr1 Aug 16 13:20:51 host... (9 Replies)
Discussion started by: notreallyhere
9 Replies

5. Shell Programming and Scripting

Convert UNIX file format to PC format

Hi All, Is there any way to convert a file which is in UNIX format to a PC format.... Flip command can be used , apart form this command can we have any other way.... like usinf "awk" etc ..... main purpose of not using flip is that my Kshell doesnot support this comamnd.... (2 Replies)
Discussion started by: Samtel
2 Replies

6. UNIX for Dummies Questions & Answers

To convert multi format file to a readable ascii format

Hi I have a file which has ascii , binary, binary decimal coded,decimal & hexadecimal data with lot of special characters (like öƒ.ƒ.„İİ¡Š·œƒ.„İİ¡Š· ) in it. I want to standardize the file into ASCII format & later use that as source . Can any one suggest a way a logic to convert such... (5 Replies)
Discussion started by: gaur.deepti
5 Replies

7. UNIX for Dummies Questions & Answers

Convert UTF8 Format file to ANSI format

:confused: Hi i am trying to convert a file which is in UTF8 format to ANSI format i tried to use the function ICONV but it is throwing error Function i used it as $ iconv -f UTF8 -t ANSI filename Error iam getting is NOT Supported UTF8 to ANSI please some help me out on... (9 Replies)
Discussion started by: rajreddy
9 Replies

8. UNIX for Advanced & Expert Users

Convert UTF8 Format file to ANSI format

:) Hi i am trying to convert a file which is in UTF8 format to ANSI format i tried to use the function ICONV but it is throwing error Function i used it as $ iconv -f UTF8 -t ANSI filename Error iam getting is NOT Supported UTF8 to ANSI please some help me out on this.........Let me... (1 Reply)
Discussion started by: rajreddy
1 Replies

9. Shell Programming and Scripting

convert mmddyy date format to ccyyddd format??

hi, for reading a cobol indexed file i need to convert "mmddyy" date format to "ccyyddd" format. i checked the datecalc and other scripts but couldnt modify them to cater to my need:(... The datecalc gives an output which i believe is the total days till that date, but i want to convert it... (2 Replies)
Discussion started by: Bhups
2 Replies

10. IP Networking

How to Achive IP address through MAC(Ethernet) address

Hi sir, i want to make such programe which takes MAC(Ethernet) address of any host & give me its IP address....... but i'm nt getting that how i can pass the MAC address to Frame........ Please give me an idea for making such program... Thanks & regards Krishna (3 Replies)
Discussion started by: krishnacins
3 Replies

Featured Tech Videos