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Full Discussion: Print n lines from top and n lines from bottom of all files with .log extenstion
Top Forums Shell Programming and Scripting Print n lines from top and n lines from bottom of all files with .log extenstion Post 302887840 by kraljic on Tuesday 11th of February 2014 06:41:44 AM
Old 02-11-2014
Print n lines from top and n lines from bottom of all files with .log extenstion
Oracle Linux 6.4

In a directory I have more than 300 files with the extension .log

I want the first 5 and last 5 lines of these .log files to be printed on screen with each file's name.

Expected output :

Code:
Printing first 5 and last 5 lines of FX_WT_Feb8_2014.log

 !! Authentication dialogue with 10.79.60.158 failed
   R:  !! Failed to pull policy from policy server
   R:  !! Did not start the scheduler
   There is no readable input file at promises.cf
    !!! System error for stat: "No such file or directory"
   
 
 !! Authentication dialogue with 10.79.60.158 failed
    R:  !! Failed to pull policy from policy server
    R:  !! Did not start the scheduler
    cf-agent was not able to get confirmation of promises from cf-promises, so going to failsafe
There is no readable input file at promises.cf

 

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LEARN ABOUT DEBIAN

cf-promises

cf-promises(8)						      System Manager's Manual						    cf-promises(8)

NAME

       cf-promises - cfengine's promise analyzer

SYNOPSIS
:
	cf-promises [options]

DESCRIPTION
:
       The  promise  agent is a validator and analysis tool for configuration files belonging to any of the components of Cfengine. Configurations
       that make changes must be approved by this validator before being executed.  cfengine is a self-healing configuration and change management
       based  system. You can think of cfengine as a very high level language, much higher level than Perl or shell. Asingle statement is called a
       promise, and compliance can result in many hundreds of filesbeing created, or the permissions of many hundreds offiles being set. The  idea
       of cfengine is to create a one or more sets of configuration files which willclassify and describe the setup of every host in a network.

COMMAND LINE OPTIONS
:
       --help, -h
	      Print the help message

       --bundlesequence, -b
	      Use the specified bundlesequence for verification

       --debug, -d
	      Set debugging level 0,1,2,3

       --verbose, -v
	      Output verbose information about the behaviour of the agent

       --dry-run, -n
	      All talk and no action mode - make no changes, only inform of promises not kept

       --version, -V
	      Output the version of the software

       --file, -f
	      Specify an alternative input file than the default

       --define, -D
	      Define a list of comma separated classes to be defined at the start of execution

       --negate, -N
	      Define a list of comma separated classes to be undefined at the start of execution

       --inform, -I
	      Print basic information about changes made to the system, i.e. promises repaired

       --diagnostic, -x
	      Activate internal diagnostics (developers only)

       --analysis, -a
	      Perform additional analysis of configuration

       --reports, -r
	      Generate reports about configuration and insert into CFDB

AUTHOR

       Mark Burgess and CFEngine AS

INFORMATION

       Bug reports: http://bug.cfengine.com, .PP Community help: http://forum.cfengine.com

       Community info: http://www.cfengine.com/pages/community

       Support services: http://www.cfengine.com

       This software is Copyright (C) 2008-2013 CFEngine AS.

							       Maintenance Commands						    cf-promises(8)
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