Restart centos7 command

ThemosteffectivewaytocheckmemoryusageinCentOSisusingthefree-hcommand,whichprovidesahuman-readableoverviewoftotal,used,free,andavailablememory;second,usetoporinstallhtopforreal-timemonitoringandper-processmemoryusage;third,check/proc/meminfofordetaile

SELinux permissions issues can be solved by creating a custom policy through audit2allow. 1. First check /var/log/audit/audit.log or use dmesg to confirm the rejection information, grep filters the denied content; 2. Use audit2allow-M to generate .te and .pp module files, and check whether the .te rules meet expectations; 3. Load the policy module through semodule-i; 4. Test whether the original operation is successful, and repeat process debugging if necessary; 5. Pay attention to avoid using audit2allow-a, ensure that SELinux is not in permissive mode, and then use it in the production environment after testing the environment to verify the effect of the policy.

TocreateabootableCentOSUSBfromWindows,downloadtheCentOSISO,useRufustowriteittoaUSBdrive,andbootfromtheUSB.1.DownloadtheCentOSISOfromtheofficialsiteandverifyitschecksum.2.UseRufus:selecttheUSBdrive,choosetheISO,setpartitionschemetoGPTforUEFI,andclickS

To expand the logical volume in CentOS, first confirm that there is available space in the volume group, and use the df-h, lvdisplay, vgdisplay commands to check the current disk and LVM layout; 1. If the volume group has no free space, you must first add the space by adding a new disk or expanding the virtual disk and executing the pvcreate and vgextend commands to add the space to the volume group; 2. Use lvextend-l 100%FREE/dev/centos/root (ext to all free space) or lvextend-L 10G/dev/centos/root (specify the increase in size) to expand the logical volume; 3. After expansion, the file system must be resize, ext4 uses resize

To safely delete a user in CentOS, first confirm that the user exists, then use the userdel command and clean up the relevant files. 1. Use idiosername to confirm the existence of the user to avoid mistaken deletion; 2. Execute sudouserdel-rusername to delete the user and its home directory, and the -r parameter ensures that the /home directory and email cache are removed at the same time; 3. If -r is not used, you need to manually execute sudorm-rf/home/username to delete the home directory, and use sudofind/-userusername-execls-l{}\; to find and process residual files; 4. The user will automatically remove it from the system group (such as wheel), without additional operations;

Update the system and install basic dependencies; 2. Install and configure MariaDB and create Zabbix dedicated database and users; 3. Install Apache and PHP and adjust PHP configuration to meet Zabbix requirements; 4. Add Zabbix official repository and refresh the cache; 5. Install Zabbix server, web front-end, Agent and related components; 6. Import the initial architecture of Zabbix database; 7. Configure the Zabbix server database connection parameters; 8. Configure the Zabbix front-end time zone and restart Apache; 9. Start and enable Zabbix service; 10. Access the web interface through the browser to complete the installation wizard and use the default credentials to log in; 11. Optional configuration firewall open

Create a mount point: Use the sudomkdir/mnt/iso-mount command to create a directory; 2. Mount the ISO file: Mount the ISO file to the specified directory through the sudomount-oloop/path/to/your/file.iso/mnt/iso-mount command; 3. Access content: Use ls/mnt/iso-mount to view the file and operate; 4. Optional persistent mount: Add corresponding entries to /etc/fstab to achieve automatic mount on the computer; 5. Uninstall ISO: Use the sudooumount/mnt/iso-mount command to uninstall the mount point and complete the operation.

Identifythediskusinglsblkorfdisk-ltolocatethecorrectdevicelike/dev/sdb.2.Optionallycreateapartitionwithfdisk/dev/sdbbyenteringn,p,acceptingdefaults,andwritingchangeswithw,resultingin/dev/sdb1.3.Formatthepartitionusingmkfs-text4/dev/sdb1forext4ormkfs-