install_mysql_centos5.6总结:其实事情很简单,答案一直就在跟前,我们却总很容易将他们忽视掉,用心想,静静地看,答案就在那里
install_mysql_CentOS5.6
总结:其实事情很简单,答案一直就在跟前,我们却总很容易将他们忽视掉,用心想,静静地看,答案就在那里。
1. download mysql-5.1.56.tar.gz to /opt/src
2. $cd /opt/src
3. $tar -zxvf mysql-5.1.56.tar.gz
4. $cd mysql-5.1.56
5. $mkdir -p /opt/apps/mysql-5.1.56 /opt/etc/mysql /opt/var/mysql
/opt/tmp/mysql
6. $./configure --prefix=/opt/apps/mysql-5.1.56/ \
--sysconfdir=/opt/etc/mysql/ \
--localstatedir=/opt/var/mysql/ \
--with-unix-socket-path=/opt/tmp/mysql/mysql.sock \
--with-tcp-port=3306 \
--with-charset=utf8 \
--with-extra-charsets=gb2312,gbk
7. $make
8. $make install
9. $su - root
10.$sudo cp /opt/src/support-files/my-medium.cnf /etc/my.cnf
11.$sudo groupadd mysql
12.$sudo useradd -g mysql mysql
13.$sudo chown -R mysql:mysql /opt/var/mysql
14.$sudo chown -R mysql:mysql /opt/tmp/mysql/
14.$ln -s /opt/apps/mysql-5.1.56 /opt/apps/mysql
15.$sudo vim /etc/my.cnf
instead skip-locking by #skip-locking
add:
skip-external-locking
16.$sudo ./mysql/bin/mysql_install_db --user=mysql
note:
generate the initial privileges or grant tables
17. 启动mysql服务
$sudo /opt/apps/mysql/bin/mysqld_safe &
note:
starts the mysqld_safe daemon, which will in turn start the MySQL server mysqld.
If the mysqld daemon crashes,mysqld_safe will restart it.
The ampersand instructs the shell to run the daemon in the background.
18.关闭mysql服务
$/opt/apps/mysql/bin/mysqladmin -u root shutdown
19.设置root密码
$/opt/apps/mysql/bin/mysqladmin -u root password 'new-password'
20.设置密码后,关闭服务
$/opt/apps/mysql/bin/mysqladmin -uroot -ppassword shutdown
或者
$/opt/apps/mysql/bin/mysqladmin -u root -p shutdown
21. 登录mysql
$mysql -u root -p
或者
$mysql -uroot -ppasswd
22.设置开机启动
$su - root
#cp /opt/src/mysql-5.1.56/support-files/mysql.server /etc/init.d/mysql
注:place the startup file for the server in the server's initial daemons directory
with the name mysql.
#chmod +x /etc/init.d/mysql
#chkconfig --add mysql
注:set the run level of the service for startup and shutdown
23. 至此可以通过相关设置
#chkconfig mysql off //设置不随机启动
#chkconfig mysql on //重新随即启动
24.启动mysql也可以更加方便
#/etc/init.d/mysql start //启动
#/etc/init.d/mysql stop //关闭
#/etc/init.d/mysql restart
或者
#service mysql start
....................................
1. error: No curses/termcap library found
sudo yum install ncurses-devel
curses构成了一个工作在底层终端代码之上的封装,并向用户提供了一个灵活高效的API
(Application Programming Interface 应用程序接口)。它提供了移动光标,
建立窗口,产生颜色,处理鼠标操作等功能。使程序员编写应用程序不需要关心那些底层的
终端操作。
ncurses是最早的System V Release 4.0 (SVr4)中 CURSES的一个克隆。这是一个
可自由配置的库,完全兼容旧版本的curses。简而言之,它是一个管理应用程序在字符终
端显示的函数库。当后面提到curses的时候,同时也可以和NCURSES互换。
2. exec: g++: not found
sudo yum install gcc-c++
3. 错误:对 C++ 内建类型 ‘bool’ 的重声明
重新./configure一下,然后再make就好了。
4. '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.、
5. 执行脚本
$sudo ./mysql/bin/mysql_install_db --user=mysql
时,出现的话,,你看过吗,却傻巴垃圾的去问人,去google.
Installing MySQL system tables...
OK
Filling help tables...
OK
To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:
/opt/apps/mysql-5.1.56/bin/mysqladmin -u root password 'new-password'
/opt/apps/mysql-5.1.56/bin/mysqladmin -u root -h net.yy.com password 'new-password'
Alternatively you can run:
/opt/apps/mysql-5.1.56/bin/mysql_secure_installation
which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.
See the manual for more instructions.
You can start the MySQL daemon with:
cd /opt/apps/mysql-5.1.56 ; /opt/apps/mysql-5.1.56/bin/mysqld_safe &
You can test the MySQL daemon with mysql-test-run.pl
cd /opt/apps/mysql-5.1.56/mysql-test ; perl mysql-test-run.pl
Please report any problems with the /opt/apps/mysql-5.1.56/bin/mysqlbug script!

TograntpermissionstonewMySQLusers,followthesesteps:1)AccessMySQLasauserwithsufficientprivileges,2)CreateanewuserwiththeCREATEUSERcommand,3)UsetheGRANTcommandtospecifypermissionslikeSELECT,INSERT,UPDATE,orALLPRIVILEGESonspecificdatabasesortables,and4)

ToaddusersinMySQLeffectivelyandsecurely,followthesesteps:1)UsetheCREATEUSERstatementtoaddanewuser,specifyingthehostandastrongpassword.2)GrantnecessaryprivilegesusingtheGRANTstatement,adheringtotheprincipleofleastprivilege.3)Implementsecuritymeasuresl

ToaddanewuserwithcomplexpermissionsinMySQL,followthesesteps:1)CreatetheuserwithCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';.2)Grantreadaccesstoalltablesin'mydatabase'withGRANTSELECTONmydatabase.TO'newuser'@'localhost';.3)Grantwriteaccessto'

The string data types in MySQL include CHAR, VARCHAR, BINARY, VARBINARY, BLOB, and TEXT. The collations determine the comparison and sorting of strings. 1.CHAR is suitable for fixed-length strings, VARCHAR is suitable for variable-length strings. 2.BINARY and VARBINARY are used for binary data, and BLOB and TEXT are used for large object data. 3. Sorting rules such as utf8mb4_unicode_ci ignores upper and lower case and is suitable for user names; utf8mb4_bin is case sensitive and is suitable for fields that require precise comparison.

The best MySQLVARCHAR column length selection should be based on data analysis, consider future growth, evaluate performance impacts, and character set requirements. 1) Analyze the data to determine typical lengths; 2) Reserve future expansion space; 3) Pay attention to the impact of large lengths on performance; 4) Consider the impact of character sets on storage. Through these steps, the efficiency and scalability of the database can be optimized.

MySQLBLOBshavelimits:TINYBLOB(255bytes),BLOB(65,535bytes),MEDIUMBLOB(16,777,215bytes),andLONGBLOB(4,294,967,295bytes).TouseBLOBseffectively:1)ConsiderperformanceimpactsandstorelargeBLOBsexternally;2)Managebackupsandreplicationcarefully;3)Usepathsinst

The best tools and technologies for automating the creation of users in MySQL include: 1. MySQLWorkbench, suitable for small to medium-sized environments, easy to use but high resource consumption; 2. Ansible, suitable for multi-server environments, simple but steep learning curve; 3. Custom Python scripts, flexible but need to ensure script security; 4. Puppet and Chef, suitable for large-scale environments, complex but scalable. Scale, learning curve and integration needs should be considered when choosing.

Yes,youcansearchinsideaBLOBinMySQLusingspecifictechniques.1)ConverttheBLOBtoaUTF-8stringwithCONVERTfunctionandsearchusingLIKE.2)ForcompressedBLOBs,useUNCOMPRESSbeforeconversion.3)Considerperformanceimpactsanddataencoding.4)Forcomplexdata,externalproc


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