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Full Discussion: How to update an entry of another file in a Shell script?
Top Forums Shell Programming and Scripting How to update an entry of another file in a Shell script? Post 302674955 by isaacniu on Saturday 21st of July 2012 01:58:45 AM
Old 07-21-2012
Question How to update an entry of another file in a Shell script?
Hi all,

Say I have a shell script called update_password.sh - in this script I want to perform a task to update a specified entry of another file (e.g. users.passpords)

update_password.sh
Code:
#!/bin/bash -e

PW_FILE_DIR="${A_DIR}/.../..."
PW_FILE="users.passwords"

I want to update the password of the user whose name is Michael!

users.passwords
Code:
James: ?????
David: ?????
Michael: ?????                       //only this entry to be updated
Frank: ?????
Thomas: ?????

May I know how to achieve or could anyone please pass me a tutorial....Thanks!
 

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LEARN ABOUT DEBIAN

update-cracklib

update-cracklib(8)					      System Manager's Manual						update-cracklib(8)

NAME

       update-cracklib - Regenerate cracklib dictionary

SYNOPSIS

       update-cracklib

DESCRIPTION

       update-cracklib	builds	a compressed and accumulated version of wordlists stored in the directories given in cracklib's configuration file
       /etc/cracklib/cracklib.conf. Programs using cracklib2 need this database to be of any use.

       By default this script is called by cron every day.

RESULT

       update-cracklib prints out two numbers: the number of words read from the ASCII dictionaries and the number  of	words  eventually  written
       into the cracklib database; if no error occurred, these should be equal.

       0 is returned on success, otherwise an error message is printed to standard error and -1 is returned.

FILES

       /etc/cracklib/cracklib.conf
	      shell script that sets cracklib_dictpath_src which must be a space separated list of source dictionary files.

SEE ALSO

       cracklib(3), crack_mkdict(8)

AUTHOR

       This program and manual page was written by Martin Pitt <martin@piware.de> for the Debian GNU/Linux System (but may be used by others).

Martin Pitt							   June 09, 2003						update-cracklib(8)
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