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Replace Text with sed

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# 1  
Old 11-23-2004
Replace Text with sed
Hi ,

I´m working on Solaris 9 SPARC and I´m writing a Script to mírror two disks..

I need to replace some text in a file ( /etc/vfstab ) .

For example:

/dev/dsk/c0t0d0s0 ==> /dev/md/dsk/d0

I just want to change the "/dev/dsk/" to "/dev/md/dsk/.


Thanks for your repsonse
# 2  
Old 11-23-2004
Something like
sed 's!/dev/dsk/!/dev/md/dsk/!' /etc/vfstab > /etc/vfstab.new
will do the job for a simple substitution.

If the actual device filenames are changing too then more work will be required.

Cheers
ZB
# 3  
Old 11-23-2004
An alternative :


echo "/dev/dsk" | sed 's/\/dev\/dsk/\/dev\/md\/dsk/'
# 4  
Old 11-23-2004
Quote:
Originally posted by bhargav
An alternative :
echo "/dev/dsk" | sed 's/\/dev\/dsk/\/dev\/md\/dsk/'
This will not work for what the OP wants to do - which is change many entries within /etc/vfstab - you're just passing some static string to the sed. Also, the backslashed escaped slashes, whilst legal syntax, make the sed expression hard to read - replacing the delimiters with "!" (or anything else) increases the readability of the expression.

Cheers
ZB
# 5  
Old 11-24-2004
I must recommend http://www.selectorweb.com/sed_tutorial.html
It was a big help for me when I was teaching myself how to use sed. The original question has been answered but I believe that the sed tutorial is a good resource for continuing education.

-Seg
# 6  
Old 11-24-2004
@ zazzybob

Thanks a Lot it works great..
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