Dealing with nulls UtilFactory.convertNull Java – comparing strings Use == for primitive data types like int If (mystring == null) Use the equals() method to compare objects Use .equals for strings : if (a.equals(“cat”)) Java - Converting int to string String myString = Integer.toString(my int value) or String str = "" + i Java - Converting String to int int i = Integer.parseInt(str); orint i = ..

만들기 ln -s (링크디렉토리/파일) (만들 심볼릭 링크) 지우기 rm (심볼릭 링크) 주의할 점은 심볼릭 링크가 만약 sym_link 라면, rm -r sym_link/ 로 하면 안됨. / 를 붙이면 sym_link에 링크된 디렉토리를 지우기 때문이다. 따라서, 심볼릭 링크만 지우고자 한다면 rm sym_link 해야 함.

------------------------------------------------------ You must create the file manually and change owners this way: # mkdir /var/log/mysql # touch /var/log/mysql/log-slow-queries.log # chown mysql.mysql -R /var/log/mysql ------------------------------------------------------ /etc/my.cnf 에서 [mysqld] set-variable=long_query_time=10 log-slow-queries=/var/log/mysql/log-slow-queries.log # /usr/local..

http://www.postgresplus.co.kr/man/index.html

윈도우 커맨드에서 사용 가능한것들 %CD% - expands to the current directory string. %DATE% - expands to current date using same format as DATE command. %TIME% - expands to current time using same format as TIME command. %RANDOM% - expands to a random decimal number between 0 and 32767. %ERRORLEVEL% - expands to the current ERRORLEVEL value %CMDEXTVERSION% - expands to the current Command Processor Extensions ver..

출처 (http://www.digimoon.net/) 소스는 아래 사이트에서 구한다. http://dovecot.org/ # wget http://dovecot.org/releases/1.1/dovecot-1.1.2.tar.gz # tar xvfz dovecot-1.1.2.tar.gz # cd dovecot-1.1.2 # ./configure --prefix=/usr --localstatedir=/var --with-pam --with-gssapi --with-mysql # make # make install # cp /usr/etc/dovecot-example.conf /usr/etc/dovecot.conf # groupadd -g 97 dovecot # useradd -u 97 -g 97 -d /us..