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Linux/UNIX/POSIX Shell Script  |  2004-02-12  |  384 b   |  17 lines
  1. #!/bin/sh
  2. # log a file tail
  3.  
  4. #Xdialog --title "Monitoring tail of $1" --smooth --fixed-font --no-cancel --ok-label "Exit" --tailbox $1 18 95
  5.  
  6. LINES1=0
  7. LINES2=0
  8. while [ 1 ];do
  9.  LINES2=`wc -l /var/log/messages | tr -s " " | cut -f 2 -d " "`
  10.  if [ $LINES2 -gt $LINES1 ];then
  11.   LINESDIFF=`expr $LINES2 - $LINES1`
  12.   tail -n $LINESDIFF /var/log/messages
  13.   LINES1=$LINES2
  14.  fi 
  15.  sleep 1
  16. done
  17.