Archive for the ‘linux’ Category

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)

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’

Forget / forgot / cannot remember root password

Tuesday, April 8th, 2008

On a FreeBSD server

1. reboot server
2. choose to boot into single user mode
3. mount -o rw <root partition> e.g. mount -o rw /
4. passwd <root account> e.g. passwd root
5. mount -o ro <root partition> e.g. mount -o ro /
6. reboot server again

Voila !!!

How to dig SRV record after creating it in DNS

Sunday, April 6th, 2008

dig <record type> <host.name>

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

ls & rm with regular expression

Friday, April 4th, 2008

e.g. rm -rf backup-20070[8-9]-*

would delete :

  • backup-200708-morning
  • backup-200708-evening
  • backup-200709-night
  • backup-200709-latenight

but not :

  • backup-200706-morning
  • backup-200707-afternoon
  • backup-200711-midnight

e.g. ls backup-20070[1-9] would list all backup starting from January to September but leave October, November & December out, of year 2007.