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Full Discussion: using "tail -f" in script
Top Forums UNIX for Dummies Questions & Answers using "tail -f" in script Post 302423367 by ikeQ on Friday 21st of May 2010 12:10:57 AM
Old 05-21-2010
I use tail -f because the file the script check will grow, the task is to handle the growing content in the file.
but since using tail -f is not wise because I have no idea how to put it in to a variable.
 

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TAILF(1)						     Linux Programmer's Manual							  TAILF(1)

NAME
tailf - follow the growth of a log file SYNOPSIS
tailf [OPTION] file DESCRIPTION
tailf will print out the last 10 lines of a file and then wait for the file to grow. It is similar to tail -f but does not access the file when it is not growing. This has the side effect of not updating the access time for the file, so a filesystem flush does not occur peri- odically when no log activity is happening. tailf is extremely useful for monitoring log files on a laptop when logging is infrequent and the user desires that the hard disk spin down to conserve battery life. Mandatory arguments to long options are mandatory for short options too. -n, --lines=N, -N output the last N lines, instead of the last 10. AUTHOR
This program was originally written by Rik Faith (faith@acm.org) and may be freely distributed under the terms of the X11/MIT License. There is ABSOLUTELY NO WARRANTY for this program. The latest inotify based implementation was written by Karel Zak (kzak@redhat.com). SEE ALSO
tail(1), less(1) AVAILABILITY
The tailf command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. 13 February 2003 TAILF(1)
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