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Top Forums Shell Programming and Scripting How to tail -f logfile. if log file is generate every 1 HR.? Post 302831791 by Just Ice on Thursday 11th of July 2013 09:46:56 PM
Old 07-11-2013
Quote:
Originally Posted by Corona688
It does, I tested it. If it doesn't, -F is broken on your system.

There'd be no point having a 'follow symlinks' option without it, after all... The OS does that perfectly well all by itself.
@ooilinlove - on the assumption that the second to the last log is not being updated any longer as soon as the latest log is started ... test the lines below in the order listed on the command line and see what happens ...
Code:
ln -sf $last_file latest.log   # <-- change $last_file to actual file name of 2nd to the last log 

tail -F latest.log

ln -sf $latest_file latest.log # <-- change $latest_file to actual file name of latest log; do this 
                               # on a separate terminal window so you see if tail -F is still working

you should not see any movement on the tail -F run after the first symlink and see changes coming through after the second symlink ... if you still do not see anything with tail -F after second the symlink, append a new readable line to the last log (i.e., date >> $last_log) in a separate window and verify that it does not show on the tail -F window ... if the new line does show up, have your sysadmin troubleshoot ... if it does not, post your complete script ...
 

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PON(1)								    Debian PPPD 							    PON(1)

NAME
pon, poff, plog - starts up, shuts down or lists the log of PPP connections SYNOPSIS
pon [ isp-name [ options ] ] poff [ -r ] [ -d ] [ -c ] [ -a ] [ -h ] [ isp-name ] plog [ arguments ] DESCRIPTION
This manual page describes the pon, plog and poff scripts, which allow users to control PPP connections. pon pon, invoked without arguments, runs the /etc/ppp/ppp_on_boot file, if it exists and is executable. Otherwise, a PPP connection will be started using configuration from /etc/ppp/peers/provider. This is the default behaviour unless an isp-name argument is given. For instance, to use ISP configuration "myisp" run: pon myisp pon will then use the options file /etc/ppp/peers/myisp. You can pass additional pppd options after the ISP name, too. pon can be used to run multiple, simultaneous PPP connections. pon takes the following command line options: -q --quick disconnect when ip-up finishes running. This function is only available to the root user. poff poff closes a PPP connection. If more than one PPP connection exists, the one named in the argument to poff will be killed, e.g. poff myprovider2 will terminate the connection to myprovider2, and leave the PPP connections to e.g. "myprovider1" or "myprovider3" up and running. poff takes the following command line options: -r causes the connection to be redialed after it is dropped. -d toggles the state of pppd's debug option. -c causes pppd(8) to renegotiate compression. -a stops all running ppp connections. If the argument isp-name is given it will be ignored. -h displays help information. -v prints the version and exits. If no argument is given, poff will stop or signal pppd if and only if there is exactly one running. If more than one connection is active, it will exit with an error code of 1. plog plog shows you the last few lines of /var/log/ppp.log. If that file doesn't exist, it shows you the last few lines of your /var/log/syslog file, but excluding the lines not generated by pppd. This script makes use of the tail(1) command, so arguments that can be passed to tail(1) can also be passed to plog. Note: the plog script can only be used by root or another system administrator in group "adm", due to security reasons. Also, to have all pppd-generated information in one logfile, that plog can show, you need the following line in your /etc/syslog.conf file: local2.* -/var/log/ppp.log FILES
/etc/ppp/options PPPd system options file. /etc/ppp/pap-secrets System PAP passwords file. /etc/ppp/chap-secrets System CHAP passwords file. /etc/ppp/peers/ Directory holding the peer options files. The default file is called provider. /etc/chatscripts/provider The chat script invoked from the default /etc/ppp/peers/provider. /var/log/ppp.log The default PPP log file. AUTHORS
The p-commands were written by Christoph Lameter <clameter@debian.org>. Updated and revised by Philip Hands <phil@hands.com>. This manual was written by Othmar Pasteka <othmar@tron.at>. Modified by Rob Levin <lilo@openprojects.net>, with some extensions taken from the old p-commands manual written by John Hasler <jhasler@debian.org>. SEE ALSO
pppd(8), chat(8), tail(1). Debian Project July 2000 PON(1)
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