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Full Discussion: How to replace a text in a file conditionally?
Top Forums Shell Programming and Scripting How to replace a text in a file conditionally? Post 302557341 by asutoshch on Wednesday 21st of September 2011 12:58:14 AM
Old 09-21-2011
How to replace a text in a file conditionally?
I have got about 100 ascii files and I want replace some variable with a new one on an HP-UX system. But I want to put a line of comments before the change. I want to make file1 to file2. I am explaining below.
file1:
Code:
line1
line2
export QNAME=ABC
line4
line5

file2:
Code:
line1
line2
# the below line is changes on 09/21
#export QNAME=ABC
export QNAME=XYZ
line4
line5

The line export QNAME is not always like export QNAME. But it will have the string ABC. Basically the catch is ABC will be replaced with XYZ - everything else remains same.

Can someone tell me a nice way of doing that ? Thank you very much.
 

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LEARN ABOUT SUNOS

export

asadmin-export(1AS)						   User Commands					       asadmin-export(1AS)

NAME

       asadmin-export, export - marks a variable name for automatic export to the environment of subsequent commands in multimode

SYNOPSIS

       export  [ name=value  [ name=value]*]

       Marks  a variable name for automatic export to the environment of subsequent commands. All subsequent commands use the variable name values
       as specified; unless you unset them or exit multimode. If only the variable name is specified, the current value of that variable  name	is
       displayed.  If  the  export  command  is  used  without	any arguments, a list of all the exported variables and their values is displayed.
       Exported shell environment variables set prior to invoking the asadmin utility are imported automatically and  set  as  exported  variables
       within asadmin. Unexported environment variables cannot be read by the asadmin utility.

OPERANDS

       name=value	       variable name and value for automatic export to the environment to be used by subsequent commands.

       Example 1: Using export to list the environment variables

       asadmin> export AS_ADMIN_HOST=bluestar AS_ADMIN_PORT=8000 AS_ADMIN_USER=admin AS_ADMIN_PASSWORD=password
       asadmin> export AS_ADMIN_PREFIX=server1.jms-service
       asadmin> export //to list the environment variables that are set
       AS_ADMIN_HOST=bluestar
       AS_ADMIN_PORT=8000
       AS_ADMIN_USER=admin
       AS_ADMIN_PASSWORD=********
       AS_ADMIN_PREFIX=server1.jms-service

       Where:  the export command lists the environment variables that are set. In this case, the environment variables have been set to: the host
       is bluestar, the port is 8000, the administrator user is admin with an associated password, and the prefix is server1.jms-service.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-unset(1AS), asadmin-multimode(1AS)

J2EE 1.4 SDK							    March 2004						       asadmin-export(1AS)
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