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Full Discussion: Delete first 100 lines from a BIG File
Top Forums UNIX for Advanced & Expert Users Delete first 100 lines from a BIG File Post 302659365 by methyl on Wednesday 20th of June 2012 07:27:33 PM
Old 06-20-2012
IMHO @drl's solution in post #15 nearly fulfils the requirement.

Reading between the lines, we are again presented with a faulty solution without a definition of the actual problem.

Taking into account Corona688's comment about inodes, this code would be safer on most unix/Linux Operating Systems:
Code:
cp test.log back.log
sed '1,100d' test.log>temp.log 
cat temp.log > test.log


I have used a similar code construct (albeit with grep -v)to remove persistent irrelevant entries from a system log where it was causing unwanted alerts (pending a fix).
Last edited by methyl; 06-20-2012 at 08:55 PM..
This User Gave Thanks to methyl For This Post:
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LEARN ABOUT HPUX

strclean

strclean(1M)															      strclean(1M)

NAME

       strclean - remove outdated STREAMS error log files

SYNOPSIS

       logdir] age]

DESCRIPTION

       cleans  the  STREAMS  error logger directory of log files mm-dd) that contain error messages sent by the STREAMS log driver, strlog(7).	If
       the option is not used to specify another directory, removes error log files in the directory.  If  the	option	is  not  used  to  specify
       another age, removes error log files that have not been modified in three days.

   Options
       recognizes the following options and command-line arguments:

       Specifies a directory for the location of the
		      STREAMS error log files to be removed if this is not the default directory

       Specifies a maximum age in days for the
		      STREAMS error log files if this not the default age of 3.  The value of age must be an integer greater than or less than 3.

EXAMPLES

       Remove day-old error log files from a directory called

FILES

       One or more error log file or files on which	 operates.   The  mm-dd  in  the filename indicates the month and day of the messages con-
							 tained in the file.

       NLS catalog for

SEE ALSO

       strerr(1M), strlog(7).

																      strclean(1M)
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