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Print first 20 lines from all .log files

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# 1  
Old 04-29-2013
Print first 20 lines from all .log files
RHEL 5.8

In a directory I have more than 200 files with the extension .log

Using head command I want to print first 20 lines of each log file.
For each .log file, it should print like below

Code:
Printing first 20 lines of : GRP_error_April29.log


Apr 29 04:02:05 raptor03b syslogd 1.4.1: restart.
Apr 29 04:05:38 raptor03b cf3[5259]:   !! Authentication dialogue with 10.79.16.158 failed
Apr 29 04:05:39 raptor03b cf3[5259]:  R:  !! Failed to pull policy from policy server
Apr 29 04:05:39 raptor03b cf3[5259]:  R:  !! Did not start the scheduler
Apr 29 04:05:39 raptor03b cf3[5298]:  There is no readable input file at promises.cf
Apr 29 04:05:39 raptor03b cf3[5298]:   !!! System error for stat: "No such file or directory"
Apr 29 04:05:39 raptor03b cf3[5298]:  cf-agent was not able to get confirmation of promises from cf-promises, so going to failsafe
Apr 29 04:10:38 raptor03b cf3[7715]:   !! Authentication dialogue with 10.193.60.158 failed
Apr 29 04:10:38 raptor03b cf3[7715]:  R:  !! Failed to pull policy from policy server
Apr 29 04:10:39 raptor03b cf3[7715]:  R:  !! Did not start the scheduler
Apr 29 04:10:39 raptor03b cf3[7760]:  There is no readable input file at promises.cf
Apr 29 04:10:39 raptor03b cf3[7760]:   !!! System error for stat: "No such file or directory"
Apr 29 04:10:39 raptor03b cf3[7760]:  cf-agent was not able to get confirmation of promises from cf-promises, so going to failsafe
Apr 29 04:15:38 raptor03b cf3[10314]:   !! Authentication dialogue with 10.193.60.158 failed
Apr 29 04:15:39 raptor03b cf3[10314]:  R:  !! Failed to pull policy from policy server
Apr 29 04:15:39 raptor03b cf3[10314]:  R:  !! Did not start the scheduler
Apr 29 04:15:39 raptor03b cf3[10393]:  There is no readable input file at promises.cf
Apr 29 04:15:39 raptor03b cf3[10393]:   !!! System error for stat: "No such file or directory"
Apr 29 04:15:39 raptor03b cf3[10393]:  cf-agent was not able to get confirmation of promises from cf-promises, so going to failsafe
Apr 29 04:20:38 raptor03b cf3[13343]:   !! Authentication dialogue with 10.79.16.158 failed

Any idea how I can do this ?
# 2  
Old 04-29-2013
Code:
#!/bin/bash
for f in /directory/*.log
 do
 echo "print the 20 first line of :$f"
 echo "---"
 head -n 20 $f
 echo ""
done

This User Gave Thanks to Jotne For This Post:
John K
# 3  
Old 04-29-2013
I dont think we need for loop there..
Code:
head -20 *

should work..
This User Gave Thanks to vidyadhar85 For This Post:
John K
# 4  
Old 04-29-2013
Without the loop , I can't get the custom string
Printing first 20 lines of : <fileName>

printed
# 5  
Old 04-29-2013
Code:
awk 'FNR == 1 { print "Printing first 20 lines of: " FILENAME } { print } FNR == 20 { nextfile }' *.log

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