Archive for the ‘Technology’ Category

mail rejects, deleted & queue in periodic.conf

Friday, April 25th, 2008

By default, after exim successfully configured and run, it sends out Megabytes of mail queue to the root mailbox. It can be annoying when using a slow download line. e.g. PSTN & ISDN dialup, 3G internet access & etc.

To stop receiving those mail queues, specify “daily_status_mailq_enable=”NO”" in /etc/periodic.conf .

*** parameters are not only store/listed in /etc/defaults/periodic.conf, check out the scripts in :

  • /etc/periodic/daily/*
  • /etc/periodic/weekly/*
  • /etc/periodic/monthly/*
  • /etc/periodic/security/*
  • /usr/local/etc/periodic/daily/*
  • /usr/local/etc/periodic/weekly/*
  • /usr/local/etc/periodic/monthly/*
  • /usr/local/etc/periodic/security/*

split - but no destination parameter to specify

Tuesday, April 22nd, 2008

first :

cd /destination/directory

second :

split /source/directory/big-huge-file prefix-to-apply-onto-splited-files

Voila !!!

(use the parameter -b to specify the size of splited files in BYTES, NOT kb, mb or gb)

cron & time zone

Friday, April 18th, 2008

after changing time zone (tzsetup), restart cron (/etc/rc.d/cron restart) to let it know the changes or else the cron jobs will use the previous time zone.

convert epoch using date command

Sunday, April 13th, 2008

date -d ‘<Unix epoch> <epoch date> sec’

e.g. date -d ‘1970-01-01 988822888 sec’ would dated “Wed May 2 17:31:28 MYT 2001″

20080430 :

get a particular date in epoch, e.g. date -d ‘Apr 30 2008 00:00:00′ ‘+%s’

How to dig SRV record after creating it in DNS

Thursday, April 10th, 2008

dig <record type> <host.name>

e.g dig SRV _someservice._port.hostname.domainame.com.my OR dig SRV _https._ICMP.host.takizo.com