I have some logs files that are runing and never stops. After few days they becomes very huge. I want to move them to other place , and than make there contents to null such that there size becomes 0. Please help me in this regard.

to accomplish this, the first requirement is that the processes which write into the logfiles either have to be off (terminated), or these processes close the log file after each write (unlikely). is either of these this your case? you will have to use cron() to implement this: man cron and google: cron tutorial

# Save a copy of incoming entries to abc1_catch too tail -fn 0 abc1 | tee abc1_catch & # Make a copy of abc1 cp abc1 abc1_part # empty abc1. So, abc1 file is always available. Almost at the same time stop copying the entries to abc1_catch > abc1;kill -9 `ps -ef|grep tail|grep -v grep|awk '{print $2}' # append the abc1_catch and abc1_whole is the file you need to move to another server cat abc1_part abc1_catch > abc1_whole Luke Chi