UGU Unix Guru Universe
For Unix Admins, By Unix Admins
Follow ugucom on Twitter      Search  in 
Home
BEGINNERS & USERS

Events

Internet
 
 Linux
BEGINNERS & USERS
Software
Linux Vendors
Usenet NewsGroups
Books & Publications
 
 Shop
Cool Admin Gifts!
Gadgets
T-Shirts
Books
 
 Unix Guru Universe
About
Add Link
Feedback
 
 
UGU: Unix Guru Universe - Unix Tip #4291- December 10, 2012 - Home : Help : Today's Tip
Unix Tip #4291- December 10, 2012

TAIL WITH COLOR



Here is how to monitor a growing
file and have it highlight a
KEYWORD:


$ tail -f FILE | perl -pe 's/KEYWORD/\e[1;31;43m$&\e[0m/g'

Replace FILE with the file to tail
Replace KEYWORD with the word to highlight.

0 : all attributes off
1 : bold
31 : foreground red
43 : background yellow

"keyword", of course, can be any perl regular expression:

(foo|bar) - highlight the strings foo and bar
\b((foo|bar)\b - highlight the words foo and bar
.*\b((foo|bar)\b.* - highlight the whole line that contains the words foo or bar

NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted by various unix admins around the globe. UGU suggest you read and test each tip in a non-volitile environment before placing into production.


LAST 5 TIPS
4290 - MERGING TWO FILES
4289 - BACKING UP PASSWORDS
4288 - DIFFERENCES WITHOUT USING DIFF
4287 - WHAT AM I LISTENING FOR?
4286 - HIDING ECHO


I want to SUBSCRIBE and get a UGU Tip everyday.
I want to UNSUBSCRIBE and NOT get a UGU Tip everyday.

If you have a UNIX TIP let us know, we just may use it:
(All tips become the property of the Unix Guru Universe)
Email Address:

Yes, email me a Hot Unix Tip everday.

Enter Hot Unix Tip (optional):

Yes, I will support this tip

Captcha (not case sensitive):


Please enter the above letters:

 
Copyright 1994-2011 Unix Guru Universe