ThothS

max_allowed_packet

2010-03-10T09:16:36+09:00

mysql의 max_allowed_packet 설정값은 mysql이 클라이언트와 통신할 때 핸들링 할 수 있는 데이터의 양

default : 1MB

# vi /etc/my.cnf

max_allowed_packet = 10M

# service mysqld restart

'Scale-out 스토리지'

2010-03-08T15:51:24+09:00

iSilon, PANASAS, IBM XIV, IBRIX, Exanet

출처 : http://blog.softbank.co.kr/195

yum -y install yum-fastestmirror

2010-03-03T15:15:53+09:00

yum -y install yum-fastestmirror

리눅스 랜카드 하나에 IP 두 개

2010-02-17T16:45:15+09:00

# vi ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
BROADCAST=xxx.xxx.xxx.xxx
HWADDR=xx:xx:xx:xx:xx:xx
IPADDR=xxx.xxx.xxx.xxx
NETMASK=255.255.255.0
NETWORK=xxx.xxx.xxx.xxx
ONBOOT=yes

# vi ifcfg-eth0:1

DEVICE=eth0:1
BOOTPROTO=static
BROADCAST=192.168.0.255
IPADDR=192.168.0.155
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes

perl 모듈 설치

2010-02-05T09:37:55+09:00

[root@backup21 nsca]# perl -MCPAN -e "install 'Nagios::Plugin', 'Getopt::Compact'" // 두개의 모듈 동시 설치 시

tar : Error exit delayed from previous errors

2010-02-05T09:31:14+09:00

tar : Error exit delayed from previous errors

tar zcvfp home.tgz /home/* --ignore-failed-read

while & watch

2010-02-05T09:30:31+09:00

while true; do; ls -al <--파일내용확인 명령

sleep 2 <--2초간 멈춤

done

==============================

watch "명령어"

rpm -q -requires yum // 패키지가 필요한 모듈(의존성 확인)

2010-01-06T15:57:00+09:00

rpm -q -requires yum // 패키지가 필요한 모듈(의존성 확인)

Mysql JDBC test

2009-12-04T12:22:22+09:00

<%@ page language="java" import="java.util.*, java.sql.*" session="true" contentType="text/html;charset=EUC_KR" %>

<HTML>
<HEAD>
<TITLE> MySQL JDBC TEST PAGE </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>

<BODY>
<h1>MySQL JDBC Test page</h1>
<br>
<table border=1 cellpadding=0 cellspacing=0>

        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;

        String jdbcUrl ="jdbc:mysql://localhost/DB명?useUnicode=true&characterEncoding=EUC_KR";
        String dbUser = "nuguna";
        String dbPass = "snrnsk";

        try {
                Class.forName("com.mysql.jdbc.Driver");
        } catch(ClassNotFoundException e) {
                System.out.println("mysql driver loading error!");
                out.println("mysql driver loading error!");
                out.println(e.toString());
                return;
        }

        try {
                con = DriverManager.getConnection(jdbcUrl, dbUser, dbPass);
        } catch(SQLException e) {
                System.out.println("mysql connection error!");
                out.println("mysql connection error!");
                out.println(e.toString());
                return;
        }

try {
stmt = con.createStatement();

String query = "show status";
rs = stmt.executeQuery(query);

                while(rs.next()) {
                        out.println("<tr>");
                        out.println("<td>" + rs.getString(1) + "</td>");
                        out.println("<td>" + rs.getString(2) + "</td>");
                        out.println("</tr>");
                }
        } catch(SQLException e ) {
                out.println(e.toString());
        }

        try {
                if(rs !=null) rs.close();
                if(stmt != null) stmt.close();
                if(con != null) con.close();
        } catch(SQLException e) {
                out.println(e.toString());
        }

%>
</table>
</BODY>
</HTML>

crontab

2009-12-01T17:55:21+09:00

minute             The minute of the hour, 0-59
hour                The hour of the day, 0-23
monthday       The day of the month, 1-31
month           The month of the year, 1-12
weekday        The day of the week, 0-6, 0=Sunday

Can't locate CPAN.pm

2009-11-19T13:54:45+09:00

http://search.cpan.org/~andk/CPAN-1.9402/lib/CPAN.pm 설치

#> perl Makefile.PL && make && make install

IPV6 설정

2009-11-05T14:02:16+09:00

# vi /etc/sysconfig/network

NETWORKING_IPV6="YES"

IPV6_DEFAULTGW=????????????????????????

# vi /etc/sysconfig/network-scripts/ifcfg-eth1

IPV6INIT=yes

IPV6ADDR=???????????????????????????

# vi /etc/resolv.conf

nameserver ??????????????????????????????

http://[IP주소]

test

2009-10-29T17:28:07+09:00

MySQL latin1 => euckr 변경

2009-10-28T17:09:19+09:00

[client]
default-character-set=euckr

[mysqld]
init_connect=SET collation_connection=euckr_korean_ci
init_connect=SET NAMES euckr
default-character-set=euckr
character-set-server=euckr
collation-server=euckr_korean_ci
language=korean

#] service mysqld restart

mysql> set names euckr;

CentOS 한글 깨짐

2009-10-28T17:07:47+09:00

#] yum -y install kde-i18n-Korean fonts-korean

#] vi /etc/sysconfig/i18n
======================================================================
LANG="ko_KR.eucKR"
SUPPORTED="en_US.UTF-8;en_US;en;ko_KR;eucKR;ko_KR;ko"
SYSFONT="lat0-sun 16"
======================================================================
#] source /etc/sysconfig/i18n