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08-05-2008
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Need Script to insert colons in each line of file
I have a file with over 500 MAC addresses. Each address is on a new line. However, the MACs do not have ":"
I need a script that will read the file, line by line and insert colons in the addresses and then print the results to a new file. current.txt looks like this 111111111111 222222222222 333333333333 Newfile.txt Needs to look like this: 11:11:11:11:11:11 22:22:22:22:22:22 etc.. |
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08-05-2008
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Code:
sed 's/../&:/g;s/:$//' inputfile > outputfile |
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08-05-2008
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would you mind explaining the command? When I looke at the outputfile it was one long string. How can I delimit each mac by a new line? the output file needs to be read by a windows system. I ran your sed command in cygwin.
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08-05-2008
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The reason is because Cygwin behaves like Unix by default, so the output file is created in Unix format (LF terminators instead of CR/LF). Use this to convert it to Windblows format: Code:
sed 's/../&:/g;s/:$//' current.txt | unix2dos > newfile.txt s/../&:/g does a global search and replace for any 2 characters, replacing them by the matched string (&) followed by a ":". This results in 11:11:11:11:11:11:, so the s/:$// part is just to strip off the terminating ":". $ is a special character to match the end of the line. |
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