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Full Discussion: Unique account id file
Top Forums Shell Programming and Scripting Unique account id file Post 302421291 by varunrbs on Friday 14th of May 2010 03:44:08 AM
Old 05-14-2010
Unique account id file

I have a fixed length file (each record of 288 characters).

The unique id in each record is account_id which is from position 1:30

My file is having duplicate account ids ( records having same account id). However the information except account_id can be different. ( Most of the records having difference balance { position 60:80}).

I want to extract only 1 record of each account id. It can be first occurrence of that account id.So the new file will have unique account id records only.

How can I achieve this.
 

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CHSH(1) 							   User Commands							   CHSH(1)

NAME
chsh - change login shell SYNOPSIS
chsh [options] [LOGIN] DESCRIPTION
The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change the login shell for her own account; the superuser may change the login shell for any account. OPTIONS
The options which apply to the chsh command are: -h, --help Display help message and exit. -s, --shell SHELL The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell. If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks. NOTE
The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser, and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell back to its original value. FILES
/etc/passwd User account information. /etc/shells List of valid login shells. /etc/login.defs Shadow password suite configuration. SEE ALSO
chfn(1), login.defs(5), passwd(5). User Commands 06/24/2011 CHSH(1)
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