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- What is gc in linux
- In Linux, "gc" usually refers to "Garbage Collection", the abbreviation of garbage collection. Garbage collection solves the problem of manual memory management by automatically detecting memory that is no longer used by the program and automatically releasing it at the appropriate time. The garbage collector tracks the reference relationships between objects, marks live objects, and then clears unreferenced objects so that they become recyclable garbage.
- Linux Operation and Maintenance 1957 2023-07-24 13:32:23
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- What does linux server setup mean?
- Linux server setup refers to configuring, installing and setting up server software and services on the Linux operating system so that it can provide network services and functions. The aspects involved are: 1. Selecting an appropriate Linux distribution; 2. Installing and configuring server software; 3. Perform network settings; 4. Improve security settings; 5. Perform performance tuning; 6. Set up monitoring tools and log management to discover and solve potential problems in a timely manner.
- Linux Operation and Maintenance 1208 2023-07-24 13:32:26
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- Will too many TCP connections in Linux cause the program to hang?
- Too many TCP connections in Linux will cause the program to hang. The situations are as follows: 1. The program exceeds the maximum number of file descriptors limited by the system, resulting in the inability to create new connections, or even causing the program to crash; 2. There are too many connections, resulting in Insufficient memory, which affects the normal operation of the program; 3. The CPU load is too high, causing the program's performance to decline or even become unresponsive; 4. Limited network bandwidth or system resources may cause problems such as connection timeout, increased latency, or packet loss, which in turn may lead to Affect the normal operation of the program.
- Linux Operation and Maintenance 2273 2023-07-24 13:32:29
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- How many threads does the Linux kernel have when executing?
- The execution of the Linux kernel does not have a fixed number of threads, but is dynamically scheduled and executed according to system requirements and hardware resources, because the Linux kernel uses a scheduler to manage processes and switches between different processes through context switching. When a process is running, some kernel threads may be created and managed, but they do not directly participate in the execution of the kernel.
- Linux Operation and Maintenance 1019 2023-07-24 13:32:32
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- Can Linux check the response status in the log command?
- Linux can check the response status in the log command. The methods are: 1. The tail command is used to view the end content of the log file; 2. The grep command is used to search for specific content in the file; 3. The less command allows page-by-page Browse the log file contents.
- Linux Operation and Maintenance 1534 2023-07-13 17:48:31
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- Can the web server be restarted in Linux?
- The web server in Linux can be restarted by: 1. Apache HTTP Server, the command is "sudo systemctl restart apache2"; 2. Nginx, the command is "sudo systemctl restart nginx"; 3. Lighttpd, the command is "sudo systemctl restart lighttpd" .
- Linux Operation and Maintenance 2288 2023-07-13 17:03:06
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- What process is jdb2 in linux?
- In the Linux system, jbd2 refers to the second generation implementation of Journaling Block Device. The jbd2 process is a process related to file system logs in the Linux kernel. It is mainly related to the ext4 file system and other file systems that support the log function. It is responsible for recording files. System metadata changes to ensure file system consistency and reliability.
- Linux Operation and Maintenance 3380 2023-07-13 16:59:50
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- What permissions are required to configure an IP address in Linux?
- Configuring IP addresses in Linux requires administrator "root" permissions, so that they have sufficient permissions to modify network settings: 1. Modify the network interface configuration file, edit the file, and change the IP address, subnet mask, gateway and other information in it ;2. Use command line tools to configure the IP address.
- Linux Operation and Maintenance 2121 2023-07-13 17:00:29
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- Can Linux delete the storage hard drive?
- Linux can delete the storage hard disk. The steps are: 1. Use the command "lsblk" or "fdisk -l" to check the hard disk list in the system and find the target hard disk to be deleted; 2. Use the "umount" command to unmount the partition; 3. , delete the partition table, and finally use the w command to save and exit; 4. Use the dd command to overwrite the data on the hard disk with zero values or random data; 5. Wait for the dd command to complete and complete the deletion.
- Linux Operation and Maintenance 2810 2023-07-13 17:02:05
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- What are the linux driver subsystems?
- The Linux driver subsystem includes: 1. Device model, a framework for managing and representing devices in the Linux kernel; 2. Character device subsystem, a framework for managing character device drivers; 3. Block device subsystem, used for management The framework of the block device driver; 4. The file system subsystem is responsible for managing and operating the file system; 5. The network device subsystem is used to manage network interface devices and network protocol stacks; 6. The bus subsystem is used to manage various Bus type and device connection; 7. USB device subsystem, used to manage and support USB devices.
- Linux Operation and Maintenance 1513 2023-07-13 16:33:28
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- What are the linux toolboxes?
- The Linux toolbox includes: 1. Text editors, such as Vim, Emacs, etc.; 2. Command line tools, such as grep for searching for text of a specified pattern in files, sed for stream editing of text, etc.; 3. Network tools , such as ping is used to test the connectivity between hosts, curl is used to send and receive network requests, etc.; 4. System monitoring tools, such as top, is used to view system processes and resource usage in real time; 5. Software package management tools, Such as yum/dnf, apt-get/apt, etc.
- Linux Operation and Maintenance 2069 2023-07-13 16:31:22
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- Is the linux list command available?
- The Linux list command is available. Common command options are: 1. ls, simply list the files and subdirectories in the current directory; 2. ls -l, display detailed information of files and subdirectories in a detailed list; 3. ls -a , displays all files and subdirectories, including hidden files starting with .; 4. ls -h, displays the size of files and subdirectories in human-readable format; 5. ls -t, sorts by last modification time; 6. ls -r, displays files and subdirectories in reverse order.
- Linux Operation and Maintenance 1420 2023-07-13 17:01:31
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- How to detect where traffic comes from in Linux
- Methods for detecting the source of traffic in Linux include: 1. iftop, a real-time traffic monitoring tool, which can be used to view the traffic source and destination of a specific network interface; 2. nethogs, a tool that displays network traffic in units of processes, which can tell which processes Networks in use and their traffic sources; 3. tcpdump, a powerful network packet capture tool that can save captured network packets to files and provides a variety of filtering options to analyze traffic.
- Linux Operation and Maintenance 1591 2023-07-13 16:02:30
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- Where is the linux home directory?
- The Linux home directory is the default location for each user to store their personal files and configuration information. The home directory is usually named after the user name and is located in the "/home" directory under the root directory. In this directory, users can create their own folders, store files, configure applications, etc.
- Linux Operation and Maintenance 6758 2023-07-13 15:55:07
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- What does alpha mean in linux
- In Linux, "alpha" usually refers to Alpha architecture or Alpha processor, and the word "alpha" is usually used in the Linux context to refer to Alpha architecture or Alpha processor related content.
- Linux Operation and Maintenance 2240 2023-07-13 14:04:35
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