Some small problems encountered in using Baidu lightweight server LS

brief introduction

First, buy a Baidu lightweight application server , New users only need 25 element ( The lowest configuration , Learning is enough ). Buy links

1. At first, I didn't find the instance I bought ...

In the admin console - You can see in the ordered products , Choose the area above , It may take a few minutes to see your own instance after just purchasing .

2. The application image has been selected at the time of purchase , But I don't see the deployed ones in the system LNMP Environmental Science ？

Enter the instance at the beginning , Carry out orders whereis perhaps find / -name mysql None of them Apache、MySQL、php.
My solution is simple , Click to enter the instance you created , Then reinstall the system , Just choose again .

3. default lnmp Under which directory are the environments installed ？

such as apache, have access to whereis apache find , Empathy mysql and php You can also find .
Apache The default is 80 port , Configuration file in /usr/local/apache/conf Under the httpd.conf and /usr/local/apache/conf/vhost In the catalog conf In file , By default, the root directory of the website points to /var/www Catalog .
You can modify the port , You can also use service start httpd; service stop httpd; Start and stop Apache. Direct browser access to the public network ip You can access .

4. How to modify / Reset default MySQL password ？

Reference link

 Because in /var/log Not found in the directory mysqld.log, Therefore, you cannot use this command directly  grep password /var/log/mysqld.log.
1.  First find MySQL Configuration file for . namely /etc/my.conf file .
2.  stay mysqld Add a line to the configuration ,skip-grant-tables=1.（ This line of configuration allows super administrators to enter MySQL You don't need a password ）
3.  And then execute the command ：
  use mysql; 
  update user set authentication_string = password("123456") where user="root";
  flush privileges;
   It should be noted here that , The password modification field of the previous version is password, stay 5.7 The field after version is authentication_string 
4.  If you want to use navicate And other tools to connect to MySQL Words , This command needs to be executed .update user set host = '%' where user = 'root';
5.  Execute the command at this time  select host, user from user; If there are two named root Users of , It can be executed delete from user where user='root' and host = '127.0.0.1'; take host Not for % Users delete .
6.  The last restart MySQL The service can be . here MySQL Your password has been changed to 123456, And you can use navicate And other tools are connected .

5. How to install locally nginx？

Reference link 1
Reference link 2

 install nginx The four dependencies that need to be installed before , The following is their introduction .
1. （GCC（GNU Compiler Collection,GNU Compiler Suite ））, You can compile  C,C++,Ada,Object C and Java Other languages ）
2. pcre It's a perl library , It is mainly used to provide the related functions of regular expressions ;
	pcre and pcre devel Is the relationship between inclusion and inclusion ,devel contain pcre
3. zlib It's a free 、 General purpose 、 Not bound by law —— That is, lossless data compression library without any patent protection , Provide compression and decompression methods 
4. OpenSSL Is an open source software library package , Applications can use this package for secure communication , Avoid eavesdropping , At the same time, confirm the identity of the connector at the other end .

 Be careful ： Baidu cloud lightweight application server I use here ,7-10 The dependency library system of step has been installed .
5.  Check that... Is installed nginx, command  ：sudo find -name nginx
6.  install nginx Necessary dependency Libraries 
7.  install gcc  command ：yum -y install gcc     See if it is installed gcc command ：gcc -v   
8.  install pcre  command ：yum install -y pcre pcre-devel
9.  install zlib  command ：yum -y install zlib zlib-devel
10.  install OpenSSL  command ：yum -y install openssl openssl-devel
11.  install nginx  The order is as follows 
	 First, go to the root directory ,cd /
	 And then execute the command  wget https://nginx.org/download/nginx-1.20.2.tar.gz   （ download nginx Compressed package , You can go to the official website to find other versions ：https://nginx.org/en/download.html）
	 Then decompress ：tar -zxvf nginx-1.20.2.tar.gz
	 Then compile and install ：cd nginx-1.20.2 && ./configure && make && make install
	 Then it's all right , The installation directory is  /usr/local/nginx Directory , Then you can go to the root directory and delete the compressed package and decompressed things .
12.  Start here nginx There were some problems when I was ！ The problem I have , Please watch carefully .
	 stay /usr/local/nginx/sbin Execute command under directory ./nginx -s reload, I can't find it /usr/local/Nginx/logs/Nginx.pid！
	 At this time, you only need to execute the command ：/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf that will do .
	 Then execute the start command again ：./nginx -s reload.nginx It will start normally .
	 see nginx Start status command ：ps -ef | grep nginx
	 hold apache Change the default port number of , And then let nginx Default access 80 port , Direct access to the public network ip You can see that nginx Welcome page of , In this way, these two can coexist .