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Full Discussion: crontab
Top Forums Shell Programming and Scripting crontab Post 302380830 by Pouchie1 on Wednesday 16th of December 2009 09:23:47 AM
Old 12-16-2009
crontab

I got a crontab like the one below. i know what it does, but I would ike ot understand why a variable X is defined and that will receive the path to the script and then what this portion will do for us :[ -x $X ] && $X


0 2 * * * X=/var/tmp/log_purge.ksh; [ -x $X ] && $X > /dev/null 2>&1

thanks for your help.
 

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ike.preshared(4)						   File Formats 						  ike.preshared(4)

NAME
ike.preshared - pre-shared keys file for IKE SYNOPSIS
/etc/inet/secret/ike.preshared DESCRIPTION
The /etc/inet/secret/ike.preshared file contains secret keying material that two IKE instances can use to authenticate each other. Because of the sensitive nature of this data, it is kept in the /etc/inet/secret directory, which is only accessible by root. Pre-shared keys are delimited by open-curly-brace ({) and close-curly-brace (}) characters. There are five name-value pairs required inside a pre-shared key: Name Value Example localidtype IP localidtype IP remoteidtype IP remoteidtype IP localid IP-address localid 10.1.1.2 remoteid IP-address remoteid 10.1.1.3 key hex-string 1234567890abcdef Comment lines with # appearing in the first column are also legal. Files in this format can also be used by the ikeadm(1M) command to load additional pre-shared keys into a running an in.iked(1M) process. EXAMPLES
Example 1: A Sample ike.preshared File The following is an example of an ike.preshared file: # # Two pre-shared keys between myself, 10.1.1.2, and two remote # hosts. Note that names are not allowed for IP addresses. # # A decent hex string can be obtained by performing: # od -x </dev/random | head # { localidtype IP localid 10.1.1.2 remoteidtype IP remoteid 10.21.12.4 key 4b656265207761732068657265210c0a } { localidtype IP localid 10.1.1.2 remoteidtype IP remoteid 10.9.1.25 key 536f20776572652042696c6c2c2052656e65652c20616e642043687269732e0a } SECURITY
If this file is compromised, all IPsec security associations derived from secrets in this file will be compromised as well. The default permissions on ike.preshared are 0600. They should stay this way. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsr | +-----------------------------+-----------------------------+ SEE ALSO
od(1), ikeadm(1M), in.iked(1M), ipseckey(1M), attributes(5), random(7D) SunOS 5.10 15 Oct 2001 ike.preshared(4)
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