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Help to mach "usb" exactly with sed or awk

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# 1  
Old 03-17-2010
Help to mach "usb" exactly with sed or awk
HI experts

I updated my question here to
eg:
Code:
$cat file
ABC: abc ABC FDFD
USB: usb usb_name usb_disk usbdriver USB
PA: PA pa paa

I want to how many usb exactly matched(not match usb_name or usbdriver) in the line cotains"USB:"

thanks in advance
Last edited by yanglei_fage; 03-17-2010 at 04:38 AM..
# 2  
Old 03-17-2010
Here is the solution,

Code:
sed -r "s/\busb\b/Match/g" file

'\b' indicates the word boundary .
# 3  
Old 03-17-2010
sed 's/^usb */match /g' a
# 4  
Old 03-17-2010
Quote:
Originally Posted by gaur84
sed 's/^usb */match /g' a
This will match if the "usb" is in the beginning of a line.

consider the following line.

Code:
usb usb_name usb_disk usbdriver USB usb



The last "usb" is not getting matched.
# 5  
Old 03-17-2010
can we get the match num eg:how many usb matched exactly
# 6  
Old 03-17-2010
Code:
grep -c "pattern" file_name.

This will give how many times the given pattern is matched in the given file.
# 7  
Old 03-17-2010
eg:


Code:
$cat file
ABC: abc ABC FDFD
USB: usb usb_name usb_disk usbdriver USB
PA: PA pa paa

I want to how many usb exactly matched(not match usb_name or usbdriver) in the line cotains"USB:"
Last edited by yanglei_fage; 03-17-2010 at 03:26 AM..
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