This article records the process of installing MySql on Linux.
1. touch Create file base sh Authorize script execution permission
2. mkdir Create folder
3. ./xx.sh Execute sh file sh test.sh
4. rpm -qa|grep -i mysql Display application installation status
5. rpm -e xxx --nodeps Forced deletion command
6. chown Modify the user and user group attributes of files and folders chown - R xxx /file
7. chmod Modify the read-write execution attributes of files and folders chmod -R 777 *.* Writable, readable and executable
8. echo Output text to the screen echo "hello world"
9. source .bash_profile Reload the configuration file Reload the java environment variable configuration file source profile
10.cp -pdr /var /storage Copy the content to another file
11.:rm -rf Delete the directory name Directory
12.cd usr/local/tomcat5/logs tail -f catalina.out View tomcat running log
13. Unzip
tar -x apr-1.6.3.tar.bz2 -C /usr/local/src (directory) Unzip
tar -xvf file.tar // Unzip the tar package
tar -xzvf file.tar.gz // Unzip tar.gz
tar -xjvf file.tar.bz2 //Extract tar.bz2
tar -xZvf file.tar.Z //Extract tar.Z
unrar e file.rar //Extract rar
unzip file.zip //Unzip zip zip -r -q -o test.zip
14./usr/local/apache/bin/apachectl start Start httpd
15.lsb_release -a View Linux system version
16.lscpu View system configuration free -m View memory
17.uptime View system load
18.mv xxx xxx Rename
19.rpm -qa |grep -i mysql Check the installed version
20.1. First switch to: cd usr/local/tomcat5/logs 2. tail -f catalina.out Check tomcat running log
21.ps -ef View the process kill -s 9 1827 Forcefully close the process ps -ef |grep java
22.rpm -qa|grep -i mysql Determine whether to install
23.yum install openssl-devel
24.rm -f * Delete all types of files in the current directory
25. wget -post-data url
26.sudo su root Switch to the root role
27.split -a 4 -b 3072000 /home/logs/zs_2018-05-15.log
crontab -e
# Perform a backup every thirty minutes crontab -u root -l
*/30 * * * * /task/ backdb.sh
sbin/service crond start //Start the service
/sbin/service crond stop //Close the service
/sbin/service crond restart //Restart the service
/sbin/service crond reload //Reload the configuration
25. Copy it remotely scp -r root@10.30.238.188:/home/tomcat/webapps/shopping /home/61/soft/tomcat/webapps/
26. Copy to remote scp -r /home/administrator/test/ root@192.168.1.100:/root/
Related recommendations:
LINUX Summary Part 4: LINUX installation using mysql_MySQL
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The five core components of the Linux operating system are: 1. Kernel, 2. System libraries, 3. System tools, 4. System services, 5. File system. These components work together to ensure the stable and efficient operation of the system, and together form a powerful and flexible operating system.

The five core elements of Linux are: 1. Kernel, 2. Command line interface, 3. File system, 4. Package management, 5. Community and open source. Together, these elements define the nature and functionality of Linux.

Linux user management and security can be achieved through the following steps: 1. Create users and groups, using commands such as sudouseradd-m-gdevelopers-s/bin/bashjohn. 2. Bulkly create users and set password policies, using the for loop and chpasswd commands. 3. Check and fix common errors, home directory and shell settings. 4. Implement best practices such as strong cryptographic policies, regular audits and the principle of minimum authority. 5. Optimize performance, use sudo and adjust PAM module configuration. Through these methods, users can be effectively managed and system security can be improved.

The core operations of Linux file system and process management include file system management and process control. 1) File system operations include creating, deleting, copying and moving files or directories, using commands such as mkdir, rmdir, cp and mv. 2) Process management involves starting, monitoring and killing processes, using commands such as ./my_script.sh&, top and kill.

Shell scripts are powerful tools for automated execution of commands in Linux systems. 1) The shell script executes commands line by line through the interpreter to process variable substitution and conditional judgment. 2) The basic usage includes backup operations, such as using the tar command to back up the directory. 3) Advanced usage involves the use of functions and case statements to manage services. 4) Debugging skills include using set-x to enable debugging mode and set-e to exit when the command fails. 5) Performance optimization is recommended to avoid subshells, use arrays and optimization loops.

Linux is a Unix-based multi-user, multi-tasking operating system that emphasizes simplicity, modularity and openness. Its core functions include: file system: organized in a tree structure, supports multiple file systems such as ext4, XFS, Btrfs, and use df-T to view file system types. Process management: View the process through the ps command, manage the process using PID, involving priority settings and signal processing. Network configuration: Flexible setting of IP addresses and managing network services, and use sudoipaddradd to configure IP. These features are applied in real-life operations through basic commands and advanced script automation, improving efficiency and reducing errors.

The methods to enter Linux maintenance mode include: 1. Edit the GRUB configuration file, add "single" or "1" parameters and update the GRUB configuration; 2. Edit the startup parameters in the GRUB menu, add "single" or "1". Exit maintenance mode only requires restarting the system. With these steps, you can quickly enter maintenance mode when needed and exit safely, ensuring system stability and security.

The core components of Linux include kernel, shell, file system, process management and memory management. 1) Kernel management system resources, 2) shell provides user interaction interface, 3) file system supports multiple formats, 4) Process management is implemented through system calls such as fork, and 5) memory management uses virtual memory technology.


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