How to check whether mysql is installed on Linux: 1. Open the terminal command window; 2. Execute the command "service mysqld start" or "chkconfig --list mysqld" command.
The operating environment of this article: linux5.9.8 system, mysql5.5, DELL G3 computer
How to check whether mysql is installed on linux ?
linux Check whether MySQL is installed:
yum install mysql
yum -y install mysql-server
1, the daemon process of mysql is mysqld
If it has been installed:
[root@localhost ~]# service mysqld start 启动 MySQL： [确定]
If it has not been installed:
[root@localhost ~]# service mysqld start mysqld:未被识别的服务
You can see if your service has been added to linux
[root@localhost ~]# chkconfig --list mysqld mysqld 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:启用 6:关闭
If it has not been installed:
[root@localhost ~]# chkconfig --list mysqld
An error occurred while reading information in the mysqld service. There is no such file or directory
Once you start the service, you can check whether the server is running like this
[root@localhost ~]# ps -el | grep mysqld 4 S 0 1796 1 0 85 0 - 1513 wait ? 00:00:00 mysqld_safe 4 S 27 1856 1796 0 78 0 - 34055 - ? 00:00:00 mysqld [root@localhost ~]#
If you If you see it, it means that the server is installed~~
Check whether apache is installed and its version under Linux
If Tong is installed through the rpm package, use the following directly Command:
rpm -q httpd
You can also use the following two methods:
httpd -v apachectl -v
Uninstall mysql method under linux Uninstall mysql under linux
a. Find the installed myslq version:
#rpm -qa | grep mysql （注意大小写，如果mysql 不行就换MySQL）
Display:
[root@localhost ~]# rpm -qa | grep mysql mysql-5.0.77-4.el5_4.2 mysql-server-5.0.77-4.el5_4.2 php-mysql-5.2.13-1.el5.art
The installed mysql package name will be displayed on the screen, such as: mysql-5.0.77-4.el5_4.2;
The searched out Uninstall package name:
#rpm -e –nodeps mysql-5.0.77-4.el5_4.2 （nodeps表示强制删除）
Tips
error: package –nodeps is not installed error: package mysql-.0.77-4.e15_.2 is not installed
Linux view mysql installation path
1. View file installation path
Due to software There is more than one installation place, so let’s first check all the paths (addresses) of the file installation.
Here is mysql as an example. For example, I installed mysql, but I don’t know where the files are installed or in which folders. You can use the following command to view all file paths
Enter in the terminal:
whereis mysql
Enter, if you have installed mysql, the address of the file installation will be displayed, such as my display (the installation address may be different)
[root@localhost ~]# whereis mysql mysql: /usr/bin/mysql /usr/lib/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz
2. Query the path of the running file (folder address)
If you only want to query the address of the running file of the file, just use the following command (still use mysql as an example):
which mysql
Terminal display:
[root@localhost ~]# which mysql /usr/bin/mysql
Recommended Study: "mysql video tutorial"
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