BEFORE APPEND

>>Script Language and Platform: Oracle

This script will insert a message into a specific line of multiple files.

I have the following files in a directory.

 [oracle@localhost jp]$ ls -l

 total 48

 -rwxrwxrwx 1 oracle oinstall 258 Aug 10 22:56 jp1.dat

 -rwxrwxrwx 1 oracle oinstall 258 Aug 10 22:56 jp2.dat

 -rwxrwxrwx 1 oracle oinstall 258 Aug 10 22:56 jp3.dat

 -rwxrwxrwx 1 oracle oinstall 258 Aug 10 22:56 jp4.dat

 -rwxrwxrwx 1 oracle oinstall 258 Aug 10 22:57 jp5.dat

I have to include the following message
“THIS SCRIPT BELONGS TO ROAD FARMS COMPANY”
in the third line of each of these files.

The redirection option “>>” can append the line to
the end of a file. Let us see how to insert the message
in the middle of a file.

I checked whether any of my files contain the message.

 [oracle@localhost jp]$ grep “THIS SCRIPT BELONGS TO ROAD FARMS  COMPANY” *dat

 [oracle@localhost jp]$

I created a while loop to implement the task of copying
the message in the middle of the files *.dat.

 [oracle@localhost jp]$ cat while_loop.sh

 #!/bin/sh -x

 #Author JP Vijaykumar Oracle DBA

 #Date   08 – 08 – 08

 #THIS SCRIPT INSERTS THE FOLLOWING MESSAGE

 #IN THE THIRD LINE OF FILES *.DAT

 #THIS SCRIPT BELONGS TO ROAD FARMS  COMPANY

 ls -1 |grep -v while_loop.sh|while read FILE

 do

 head -2 $FILE >> TEMP

 echo “THIS SCRIPT BELONGS TO ROAD FARMS  COMPANY” >> TEMP

 tail -`cat $FILE|wc -l|awk ‘{print $0 -2}’` $FILE >> TEMP

 mv TEMP $FILE

 done
 exit

I executed the script.

 [oracle@localhost jp]$./while_loop.sh

I checked whether any of my files contain this message.

 [oracle@localhost jp]$ grep “THIS SCRIPT BELONGS TO ROAD FARMS COMPANY” *dat

 jp1.dat:THIS SCRIPT BELONGS TO ROAD FARMS COMPANY

 jp2.dat:THIS SCRIPT BELONGS TO ROAD FARMS COMPANY

 jp3.dat:THIS SCRIPT BELONGS TO ROAD FARMS COMPANY

 jp4.dat:THIS SCRIPT BELONGS TO ROAD FARMS COMPANY

 jp5.dat:THIS SCRIPT BELONGS TO ROAD FARMS COMPANY

Please test this script thoroughly before implementing.

Author: JP Vijaykumar

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however, is at your sole risk. All information on these pages is provided
“as -is”, without any warranty, whether express or implied, of its accuracy,
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