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Top Forums Shell Programming and Scripting Create user if UID not exist; else, exit the script Post 302742995 by Scott on Wednesday 12th of December 2012 02:40:22 AM
Old 12-12-2012
You could use the id command:

Code:
# cat myScript
if ! id 2340 > /dev/null 2>&1; then
  echo ok to create user...
fi

# ./myScript
ok to create user...

 

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CREATE_MUNGE_KEY(8)					    MUNGE Uid 'N' Gid Emporium					       CREATE_MUNGE_KEY(8)

NAME
create-munge-key - Create munge key SYNOPSIS
create-munge-key [OPTION]... DESCRIPTION
The create-munge-key script creates a cryptographic key for munge(8) authentication service OPTIONS
-h Display a summary of the command-line options. -r specify /dev/random as random file for key generation default is /dev/urandom which provide a worst entropy -f Force overwriting existing old key EXIT STATUS
The create-munge-key returns a zero exit code when the key is successfully created. On error, it prints an error message to stderr and returns a non-zero exit code. AUTHOR
Gennaro Oliva <oliva.g@na.icar.cnr.it> SEE ALSO
remunge(1), unmunge(1), munge(3), munge_ctx(3), munge_enum(3), munge(7), munged(8). http://munge.googlecode.com/ MUNGE
2007-03-17 CREATE_MUNGE_KEY(8)
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