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Top Forums Shell Programming and Scripting Problem with UNIX cut command Post 36350 by kevin80 on Tuesday 27th of May 2003 10:10:00 PM
Old 05-27-2003
Problem with UNIX cut command

#!/usr/bin/bash
cat /etc/passwd | while read A
do
USER=`echo “$A” | cut -f 1 -d “:”`
echo “Found $USER”
done


This shell script should make USER = the first field of the first line of the file /etc/passwd
Eg:
adm
daemon
bob
jane
kev
etc ...

However USER=echo “$A” | cut -f 1 -d “:”
What have I done wrong ???

Thanks
 

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CREATE USER 
MAPPING(7) SQL Commands CREATE USER MAPPING(7) NAME
CREATE USER MAPPING - define a new mapping of a user to a foreign server SYNOPSIS
CREATE USER MAPPING FOR { username | USER | CURRENT_USER | PUBLIC } SERVER servername [ OPTIONS ( option 'value' [ , ... ] ) ] DESCRIPTION
CREATE USER MAPPING defines a mapping of a user to a foreign server. A user mapping typically encapsulates connection information that a foreign-data wrapper uses together with the information encapsulated be a foreign server to access an external data resource. The owner of a foreign server can create user mappings for that server for any user. Also, a user can create a user mapping for his own user name if USAGE privilege on the server has been granted to the user. PARAMETERS
username The name of an existing user that is mapped to foreign server. CURRENT_USER and USER match the name of the current user. When PUB- LIC is specified, a so-called public mapping is created that is used when no user-specific mapping is applicable. servername The name of an existing server for which the user mapping is to be created. OPTIONS ( option 'value' [, ... ] ) This clause specifies the options of the user mapping. The options typically define the actual user name and password of the map- ping. Option names must be unique. The allowed option names and values are specific to the server's foreign-data wrapper. EXAMPLES
Create a user mapping for user bob, server foo: CREATE USER MAPPING FOR bob SERVER foo OPTIONS (user 'bob', password 'secret'); COMPATIBILITY
CREATE USER MAPPING conforms to ISO/IEC 9075-9 (SQL/MED). SEE ALSO
ALTER USER MAPPING [alter_user_mapping(7)], DROP USER MAPPING [drop_user_mapping(7)], CREATE FOREIGN DATA WRAPPER [create_for- eign_data_wrapper(7)], CREATE SERVER [create_server(7)] SQL - Language Statements 2010-05-14 CREATE USER MAPPING(7)
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