How to find keywords in vi in ​​linux

Network binding configuration requires selecting the mode before setting the file. 1. Select mode: mode=0 realizes load balancing, and requires switch cooperation; mode=1 is highly available for main and backup, suitable for single network card work; mode=4 requires LACP support, better performance. 2. Edit configuration files: Create ifcfg-bond0 under /etc/sysconfig/network-scripts/ and set IP and other parameters, and modify each network card file to point to bond0. 3. Loading module restart service: execute modprobebonding to load the module, and then restart the network with systemctlrestartnetwork. 4. Pay attention to the problem: Make sure the switch matches LACP and avoids IP conflicts

Systemdtimersareamodern,morerobustalternativetocronjobsforschedulingtasksonLinux.1.Theyworkusingpaired.timerand.servicefiles,wherethetimerdefineswhentorunandtheservicedefineswhattoexecute.2.Tocreateadailybackuptaskat2AM,youcreateaservicefilespecifyin

The way to enter single-user mode varies from system to system: 1. Linux (CentOS/RHEL) starts after editing startup parameters in the GRUB menu and add init=/bin/bash or rd.break; 2. Ubuntu selects the recovery mode kernel to enter the menu interface; 3. After macOS shuts down, press Command S to enter the command line interface; 4. Windows does not have single-user mode but can use safe mode or WinRE command prompt. Each method provides an environment with root permissions for system maintenance.

To configure transparent large pages (THP), first check the current status and use cat/sys/kernel/mm/transparent_hugepage/enabled to view; 1. Temporary adjustments can be made by writing always, madvise or never to the file; 2. Permanent configuration requires modifying GRUB_CMDLINE_LINUX in /etc/default/grub to add transparent_hugepage= parameter and update GRUB; 3. Select mode according to application type: always suitable for general scenarios, madvise is used for delay-sensitive applications, and never is used for memory-intensive services such as MySQL

To use yum to update the software package, first view the updated content, and then choose the update method according to your needs. 1. Check the updated package: execute yumlistupdates to understand the items to be upgraded; 2. Update specific packages: Use yumupdatepackage_name1package_name2 to accurately control the upgrade object, such as yumupdatenginxopenssl; 3. Update all available packages: Run yumupdate and confirm the operation to complete the full upgrade; 4. Optional cleaning of old dependencies: After installing yum-utils, clear multiples through package-cleanup-oldkernels-count=1

When there is a problem with the firewall, the most direct impact is that the network connection is blocked, and the troubleshooting needs to be carried out in accordance with the steps. First, check whether the firewall is enabled. Linux uses systemctlstatusfirewalld to view it. Windows can view it in the control panel. Second, check whether the rules are too strict or conflicting. For example, ports 22, 80, and 443 are disabled, and the test can be temporarily relaxed. Then check the log information. Linux is in /var/log/messages or journalctl. Windows uses the event viewer to find the interception record. Finally, confirm whether other devices or software such as antivirus software, router ACLs, cloud security groups, etc. are interfered. If necessary, close third-party software or contact the IT department for assistance.

To update Linux system packages, you must first run sudoaptupdate to refresh the source list, otherwise it may cause the installation to fail or the version is too old. 1. Update the software source: execute sudoaptupdate; 2. Upgrade the software package: It is recommended to use sudoaptfull-upgrade to completely upgrade and install new dependencies, but be careful to uninstall conflict packages; 3. Clean useless packages: Use sudoaptautoremove and sudoaptclean to release disk space; in addition, when encountering GPG errors, you should check the key. If you connect to a connection problem, you can try to replace the domestic mirror source. Usually, you can use aptlist-upgradable to view the upgradeable package, or complete it at one time with the command chain.

There are four core points to master when managing cloud instances on Google CloudPlatform (GCE): 1. Select the appropriate machine type, region and operating system according to application needs before creating an instance to avoid excessive configuration; 2. Use unified naming specifications and tags to organize resources to facilitate collaboration and management; 3. Use Metadata and StartupScript to automate the initial configuration of instances to improve efficiency; 4. Use CloudMonitoring and Logging to continuously monitor key indicators and set alerts to ensure the stable operation of the instance.