View MySQL's installation path under Linux

Under Linux, check to see if MySQL, Apache is installed, and uninstalled.

Instruction Ps-ef|grep MySQL Results

2. Root     17659       1    0   2011  ?         00 : 00 : 00  /bin/sh /usr/bin/mysqld_safe --datadir=/ var/lib/mysql --socket=/var/lib/mysql/mysql.sock --log-error=/var/log/mysqld.log --pid-file=/ Var/run/mysqld/mysqld.pid   
4. MySQL 17719 17659 0 ? From: £ /usr/libexec/mysqld--basedir=/usr--datadir=/var/lib/mysql  --user=mysql--pid-file=/var/run/mysqld/mysqld.pid--skip-external-locking--socket=/var/lib/mysql/mysql.sock

Usr/bin/mysql refers to: The running path of MySQL
Var/lib/mysql refers to: The storage path of MySQL database files
Usr/lib/mysql refers to: MySQL installation path

The 1,mysql daemon is mysqld

If it is already installed:

[[Email protected] ~]# service mysqld start
Start MySQL: [OK]

If you do not have the installation:

[[Email protected] ~]# service mysqld start
MYSQLD: Unrecognized service

You can see if your service has been added to Linux.

[Email protected] ~]# chkconfig--list mysqld
Mysqld 0: Off 1: Off 2: Off 3: Off 4: Off 5: Enable 6: Off

There is no installation:
[Email protected] ~]# chkconfig--list mysqld
Error reading information in MYSQLD service, no file or directory

Once you have started the service, you can check to see if the server is running

[Email protected] ~]# Ps-el | grep mysqld
4 S 0 1796 1 0 0-1513 wait? 00:00:00 Mysqld_safe
4 S 27 1856 1796 0 78 0-34055-? 00:00:00 mysqld
[Email protected] ~]#
If you see one, it means the server is installed ~ ~

See if Apache is installed and versioned under Linux

If the pass is installed through the RPM package, use the following command directly:
Rpm-q httpd

You can also use the following two ways:
Httpd-v

Apachectl-v

Uninstall MySQL method under Linux

A. Find the installed MYSLQ version:
#rpm-qa | grep MySQL (note case, if MySQL does not change MySQL)

Show:
[Email protected] ~]# 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
Copy Code
On the screen will display the installed MySQL package name such as: mysql-5.0.77-4.el5_4.2;

Uninstall the search for the package name:

#rpm-e–nodeps mysql-5.0.77-4.el5_4.2 (nodeps indicates forced deletion)

Tips
Error:package–nodeps is not installed
Error:package mysql-.0.77-4.e15_.2 is not installed

Linux View MySQL installation path

First, view the file installation path

Since there is more than one place to install the software, all the paths (addresses) that are first said to view the file installation.

Take MySQL for example here. For example, I installed MySQL, but do not know where the files are installed, in which folders, you can use the following command to view all the file path
In Terminal input:

Whereis MySQL

Enter, if you installed MySQL, will show the file installation address, such as my display (the installation address may be different)

[[email protected] ~]# Whereis MySQL
MySQL:/usr/bin/mysql/usr/lib/mysql/usr/share/mysql/usr/share/man/man1/mysql.1.gz

Second, the path of the query running file (folder address)

If you just query the file's running file address, you can use the following command (or MySQL, for example):

which MySQL

Terminal display:

[[email protected] ~]# which MySQL
/usr/bin/mysql

View MySQL's installation path under Linux