Operation and Maintenance
Linux Operation and Maintenance
How to solve the problem that Linux service cannot use system environment variables
How to solve the problem that Linux service cannot use system environment variables
May 16, 2023 pm 07:28 PM
Linux service cannot use system environment variables
Detailed description
When doing a mysql multi-instance installation before, the installation was successful, linux It can also be started successfully; however, moving support-files/mysqld_multi.server to the /etc/init.d/ directory and setting the startup (chkconfig xxx on) fails;
Problem Exploration
I found the problem and started to solve it. I found that service xxx start could not start multiple instances of mysql, but mysqld_multi start could be used; then after various attempts, I found that the mysql environment variables set by /etc/profile could be printed out in a normal environment, but The mysql environment variable cannot be printed in the service made by the shell;
My /etc/frofile file:
export PATH=/usr/local/mysql/bin:$PATH
Execution: You can see that the mysql environment variable is set
[root@localhost init.d]# echo $PATH /usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
Then we define a system V script
[root@localhost init.d]# vi /etc/init.d/mysqlmul #!/bin/bash #chkconfig: - 75 15 #description: test
Give permissions and set it to service
[root@localhost init.d]#chmod +x /etc/init.d/mysqlmul [root@localhost init.d]#chkconfig --add mysqlmul
Execute service: As a result, you can see that there is no mysql environment variable
[root@localhost init.d]# service mysqlmul start /sbin:/usr/sbin:/bin:/usr/bin
Solution
1. Add export PATH=/usr/local/mysql/bin:$PATH
## to the service just set in /etc/init.d/xxx #Note:
When putting a shell script into the service, you need to set the PATH and other environments. Use of environment variable files in service filesTest preparationc Test programThe contents of LogTest.cpp are as follows:// 測試代碼
#include <stdio.h>
#include <iostream>
using namespace std;
int main(int argc, const char* argv[])
{
int size = 0;
// 解析傳入?yún)?shù)（argc和argv），代碼略
// ...
cout << size <<endl;
while(1);
return 0;
} service file
LogTest.service file[Unit]
Description=LogTest
After=network.target
[Service]
Type=simple
EnvironmentFile=-/etc/sysconfig/LogTest
ExecStart=/usr/local/MyTest/LogTest -s ${TESTSIZE}
ExecStop=/bin/kill -s QUIT $MAINPID
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=LogTest
[Install]
WantedBy=multi-user.targetEnvironment variable file
Environment variable file LogTest is placed in /etc/sysconfig /Under contents.# 環(huán)境變量文件,可根據(jù)需要新增 TESTSIZE=10Test process1) Compile the c test program and copy the test program to the /usr/local/MyTest/ directory.
cp LogTest /usr/local/MyTest/2) Log configuration For log related configuration, please view https://blog. csdn.net/www_dong/article/details/128053496. 3) Service file loading
# 文件拷貝 cp LogTest.service /usr/lib/systemd/system # 文件加載 systemctl daemon-reload # 程序啟動 systemctl start LogTest # 查看進程是否啟動成功 ps -aux | grep LogTest4) View LogTest program log
# 進入日志所在目錄 cd /var/log # 查看LogTest.log cat LogTest.logDescription: The log prints out 10, indicating that the entire process is successful
The above is the detailed content of How to solve the problem that Linux service cannot use system environment variables. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Postman Integrated Application on CentOS
May 19, 2025 pm 08:00 PM
Integrating Postman applications on CentOS can be achieved through a variety of methods. The following are the detailed steps and suggestions: Install Postman by downloading the installation package to download Postman's Linux version installation package: Visit Postman's official website and select the version suitable for Linux to download. Unzip the installation package: Use the following command to unzip the installation package to the specified directory, for example /opt: sudotar-xzfpostman-linux-x64-xx.xx.xx.tar.gz-C/opt Please note that "postman-linux-x64-xx.xx.xx.tar.gz" is replaced by the file name you actually downloaded. Create symbols
The difference between programming in Java and other languages ??Analysis of the advantages of cross-platform features of Java
May 20, 2025 pm 08:21 PM
The main difference between Java and other programming languages ??is its cross-platform feature of "writing at once, running everywhere". 1. The syntax of Java is close to C, but it removes pointer operations that are prone to errors, making it suitable for large enterprise applications. 2. Compared with Python, Java has more advantages in performance and large-scale data processing. The cross-platform advantage of Java stems from the Java virtual machine (JVM), which can run the same bytecode on different platforms, simplifying development and deployment, but be careful to avoid using platform-specific APIs to maintain cross-platformity.
Where is the pycharm interpreter?
May 23, 2025 pm 10:09 PM
Setting the location of the interpreter in PyCharm can be achieved through the following steps: 1. Open PyCharm, click the "File" menu, and select "Settings" or "Preferences". 2. Find and click "Project:[Your Project Name]" and select "PythonInterpreter". 3. Click "AddInterpreter", select "SystemInterpreter", browse to the Python installation directory, select the Python executable file, and click "OK". When setting up the interpreter, you need to pay attention to path correctness, version compatibility and the use of the virtual environment to ensure the smooth operation of the project.
How to manually install plugin packages in VSCode
May 15, 2025 pm 09:33 PM
The steps to manually install the plug-in package in VSCode are: 1. Download the .vsix file of the plug-in; 2. Open VSCode and press Ctrl Shift P (Windows/Linux) or Cmd Shift P (Mac) to call up the command panel; 3. Enter and select Extensions:InstallfromVSIX..., then select .vsix file and install. Manually installing plug-ins provides a flexible way to install, especially when the network is restricted or the plug-in market is unavailable, but attention needs to be paid to file security and possible dependencies.
Detailed introduction to each directory of Linux and each directory (reprinted)
May 22, 2025 pm 07:54 PM
[Common Directory Description] Directory/bin stores binary executable files (ls, cat, mkdir, etc.), and common commands are generally here. /etc stores system management and configuration files/home stores all user files. The root directory of the user's home directory is the basis of the user's home directory. For example, the home directory of the user user is /home/user. You can use ~user to represent /usr to store system applications. The more important directory /usr/local Local system administrator software installation directory (install system-level applications). This is the largest directory, and almost all the applications and files to be used are in this directory. /usr/x11r6?Directory for storing x?window/usr/bin?Many
After installing Nginx, the configuration file path and initial settings
May 16, 2025 pm 10:54 PM
Understanding Nginx's configuration file path and initial settings is very important because it is the first step in optimizing and managing a web server. 1) The configuration file path is usually /etc/nginx/nginx.conf. The syntax can be found and tested using the nginx-t command. 2) The initial settings include global settings (such as user, worker_processes) and HTTP settings (such as include, log_format). These settings allow customization and extension according to requirements. Incorrect configuration may lead to performance issues and security vulnerabilities.
MySQL installation tutorial teach you step by step the detailed steps for installing and configuration of mySQL step by step
May 23, 2025 am 06:09 AM
The installation and configuration of MySQL can be completed through the following steps: 1. Download the installation package suitable for the operating system from the official website. 2. Run the installer, select the "Developer Default" option and set the root user password. 3. After installation, configure environment variables to ensure that the bin directory of MySQL is in PATH. 4. When creating a user, follow the principle of minimum permissions and set a strong password. 5. Adjust the innodb_buffer_pool_size and max_connections parameters when optimizing performance. 6. Back up the database regularly and optimize query statements to improve performance.
Comparison between Informix and MySQL on Linux
May 29, 2025 pm 11:21 PM
Informix and MySQL are both popular relational database management systems. They perform well in Linux environments and are widely used. The following is a comparison and analysis of the two on the Linux platform: Installing and configuring Informix: Deploying Informix on Linux requires downloading the corresponding installation files, and then completing the installation and configuration process according to the official documentation. MySQL: The installation process of MySQL is relatively simple, and can be easily installed through system package management tools (such as apt or yum), and there are a large number of tutorials and community support on the network for reference. Performance Informix: Informix has excellent performance and
