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Full Discussion: Tail command in one line
Operating Systems Solaris Tail command in one line Post 302247136 by saurabh84g on Wednesday 15th of October 2008 04:00:44 AM
Old 10-15-2008
Data Tail command in one line

HI i have to copy the last 5000 lines form a log file and copy the same in the same file .overwriting the same log file.

ex: tail -5000 testfile1 > testfile2
cat testfile2
mv tesftfile2 testfile1


will produce the correct result.but i want to have this done in one line????
 

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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 package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. 13 February 2003 TAILF(1)
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