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Top Forums UNIX for Dummies Questions & Answers check length content existence of variable Post 302336238 by skinnygav on Tuesday 21st of July 2009 03:40:52 PM
Old 07-21-2009
check length content existence of variable

hi guys, im learning so be gentle...

i'm wanting to write a script to read in a customer number.

in order that the code is robust i want to check

1) the length of the value entered (4 characters)
2) that all characters entered are numeric between the values 1 to 3
3) that a value is entered

could anyone give me a few pointers to the commans/systax i will need to use for each check?

also any idea if any of them can be combined?

any pointers welcome...

thanks

skinnygav
 

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CHECKSECURITY(8)					      System Manager's Manual						  CHECKSECURITY(8)

NAME
checksecurity - Run a collection of simple system checks SYNOPSIS
checksecurity DESCRIPTION
The checksecurity command runs a small collection of simple system checks which are designed to catch a few common security issues. check- security is run by cron in a daily basis. CONFIGURATION
The checksecurity.conf file defines several configuration variables: MAILTO, CHECK_DISKFREE, CHECK_PASSWD and CHECK_SETUID LOGDIR. Each is described below. The checksecurity program works with a collection of plugins which are located in /usr/share/checksecurity and are configured individually by their own configuration file. CHECK_PASSWD If this is set to TRUE then the check-passwd script will be invoked. This script is designed to report upon system accounts which have no passwords. CHECK_DISKFREE If this is set to TRUE then the check-diskfree script will be invoked and will allow an alert to be sent if there is any mounted partition is running short on disk space. CHECK_SETUID If this is set to TRUE then the check-setuid script will be invoked, this will compare the setuid binaries upon the system to those that existed previously and show the differences. FILES
/etc/checksecurity.conf checksecurity configuration file SEE-ALSO See also check-diskfree(8), check-setuid(8), and check-passwd(8) Debian Linux 2 February 1997 CHECKSECURITY(8)
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