What to do if Linux cannot log in using telnet

Linux system restricts user resources through the ulimit command to prevent excessive use of resources. 1.ulimit is a built-in shell command that can limit the number of file descriptors (-n), memory size (-v), thread count (-u), etc., which are divided into soft limit (current effective value) and hard limit (maximum upper limit). 2. Use the ulimit command directly for temporary modification, such as ulimit-n2048, but it is only valid for the current session. 3. For permanent effect, you need to modify /etc/security/limits.conf and PAM configuration files, and add sessionrequiredpam_limits.so. 4. The systemd service needs to set Lim in the unit file

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

The reason why the editor crashes after the VSCode plugin is updated is that there is compatibility issues with the plugin with existing versions of VSCode or other plugins. Solutions include: 1. Disable the plug-in to troubleshoot problems one by one; 2. Downgrade the problem plug-in to the previous version; 3. Find alternative plug-ins; 4. Keep VSCode and plug-in updated and conduct sufficient testing; 5. Set up automatic backup function to prevent data loss.

To tune MySQL into a Chinese interface, it can be implemented through MySQLWorkbench or command line tools. 1) In MySQLWorkbench, open "Preferences", select the "Appearance" tab, and then select "Chinese(Simplified)" in the "Language" drop-down menu, and restart. 2) When using command line tools, set the operating system locale variables, such as using "exportLANG=zh_CN.UTF-8" on Linux or macOS, and then run the mysql client.

Debian Text Editor is a basic text editing tool, mainly used for daily simple text editing work. Compared with other mainstream editors, it has certain limitations in performance and user experience. Here are the advantages and features of several other editors compared to Debian text editors: Notepad Loading large files speed: Notepad can quickly load large files, such as 1GB-sized SQL files in just 8 seconds, which is nearly 47 times faster than standard text editors. Code coloring function: Supports code coloring in about 80 programming languages, which helps improve coding efficiency. Batch operation capability: It has column editing mode, which is convenient for performing batch processing tasks such as financial verification or operation and maintenance logs. Extension plug-in branch

Starting SFTP service in Debian systems usually requires the help of an OpenSSH server. The following are the specific steps: 1. Install the OpenSSH server First, confirm that the OpenSSH server is installed on your Debian system. If not installed, you can complete the installation by following command: sudoaptupdatesudoaptininstallopenssh-server2. After starting the OpenSSH server installation is completed, the OpenSSH server will generally start automatically. You can check its running status through the following command: sudosystemctlstatusssh If the service is not running, you can start it with the following command: s

Linux and Windows have their own advantages and disadvantages in CPU and memory usage: 1) Linux uses time slice-based scheduling algorithms to ensure fairness and efficiency; Windows uses priority scheduling, which may cause low-priority processes to wait. 2) Linux manages memory through paging and switching mechanisms to reduce fragmentation; Windows tends to pre-allocate and dynamic adjustment, and efficiency may fluctuate.

Linux's cost of ownership is usually lower than Windows. 1) Linux does not require license fees, saving a lot of costs, while Windows requires purchasing a license. 2) Linux has low hardware requirements and can extend the service life of the device. 3) The Linux community provides free support to reduce maintenance costs. 4) Linux is highly secure and reduces productivity losses. 5) The Linux learning curve is steep, but Windows is easier to use. The choice should be based on specific needs and budget.