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Top Forums Shell Programming and Scripting pattern match and replace another pattern in same line Post 302574853 by Corona688 on Friday 18th of November 2011 01:16:09 PM
Old 11-18-2011
This will print all lines, but first modify the shell field if the username matches username.

Code:
awk -v FS=: -v OFS=: -v USER="username" '$1==USER { $7="/usr/local/my/bin/noshell" } 1' < input > output

# CHECK THE OUTPUT FIRST before overwriting your input!
# You don't want to mangle /etc/passwd by accident.
# Also, overwrite it, don't do mv output input.  
# Changing /etc/passwd's ownership or permissions would be bad.
cat output > input

 

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DROP USER 
MAPPING(7) SQL Commands DROP USER MAPPING(7) NAME
DROP USER MAPPING - remove a user mapping for a foreign server SYNOPSIS
DROP USER MAPPING [ IF EXISTS ] FOR { username | USER | CURRENT_USER | PUBLIC } SERVER servername DESCRIPTION
DROP USER MAPPING removes an existing user mapping from foreign server. The owner of a foreign server can drop user mappings for that server for any user. Also, a user can drop a user mapping for his own user name if USAGE privilege on the server has been granted to the user. PARAMETERS
IF EXISTS Do not throw an error if the user mapping does not exist. A notice is issued in this case. username User name of the mapping. CURRENT_USER and USER match the name of the current user. PUBLIC is used to match all present and future user names in the system. servername Server name of the user mapping. EXAMPLES
Drop a user mapping bob, server foo if it exists: DROP USER MAPPING IF EXISTS FOR bob SERVER foo; COMPATIBILITY
DROP USER MAPPING conforms to ISO/IEC 9075-9 (SQL/MED). The IF EXISTS clause is a PostgreSQL extension. SEE ALSO
CREATE USER MAPPING [create_user_mapping(7)], ALTER USER MAPPING [alter_user_mapping(7)] SQL - Language Statements 2010-05-14 DROP USER MAPPING(7)
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