Debian has an interesting command timeout:
timeout 5 tail -f /var/log/messages
If you do not have timeout package installed, perl can be used to perform the same:
perl -e "alarm shift @ARGV; exec @ARGV;" 5 tail -f /var/log/messages
Reference links:
http://michael.thegrebs.com/2008/05/27/most-awesome-command-ever/
http://www.cyberciti.biz/faq/shell-scripting-run-command-under-alarmclock/
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