thinkiii

Thursday, April 29, 2010

Interesting set intersection by using 'uniq'

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I was asked to find the intersection of two IP lists yesterday. I write a simple program with Perl. The program iterates the two lists to fi...
Wednesday, March 31, 2010

X forwarding in ssh

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To enable X forwarding, try the following command ssh -X xxx.xxx.xxx.xxx than we can launch a program with GUI through ssh. Sometimes it doe...

duplicate a new table in Oracle

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create table [new table name] as select * from [table name]
Wednesday, March 17, 2010

Remove VirtualBox lock

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The lock file of VirtualBox is placed in /tmp/.vbox-[user name]-ipc
2 comments:
Monday, February 8, 2010

default apache2 username on Debian

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www-data
Tuesday, January 12, 2010

fighting with oci8 - apache2 + php5 + Oracle

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Connecting to the Oracle database by using apache2 + php5 is simple -- if you already know all the traps along the way. In order to connect ...
Tuesday, January 5, 2010

rrdtool - every data is a rate!

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This article is about understanding the rate calculating in the rrdtool. I'm doing a SA project recently. We get the RTTs(round-trip tim...
Wednesday, December 30, 2009

Config language - sqldeveloper

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sqldeveloper\sqldeveloper\bin\sqldeveloper.config AddVMOption -Duser.language=en AddVMOption -Duser.region=US
Sunday, December 13, 2009

double fork to avoid zombie process

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It is a common mistake to fork a child process without calling waitpid() to wait for the termination of the child process. Without a wait() ...
16 comments:
Monday, December 7, 2009

kill all child process

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killtree () { for child in $(ps -o pid= --ppid $1) do killtree $child done echo "kill -9 $1...
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