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How to properly shut down or reboot a Linux system
Shut down or restart using the correct commands to ensure data security. The shutdown command is preferred, such as sudoshutdown-hnow to shut down the system immediately, and sudoreboot to restart the system; systemctlpoweroff or systemctlreboot is recommended for modern systems to avoid direct power outage.
Dec 02, 2025 am 06:14 AM
How to install the Nginx web server on Linux
InstallNginxusingthesystem'spackagemanager:onUbuntu/Debian,usesudoaptinstallnginx;onCentOS/RHEL,usesudodnfinstallnginxorsudoyuminstallnginxwithEPELifneeded.2.Startandenabletheservicewithsudosystemctlstartnginxandsudosystemctlenablenginx,thencheckstat
Dec 01, 2025 am 05:59 AM
How to install Docker on a Linux system
Updatesystempackagesusingaptordnf.2.InstallrequireddependenciesforHTTPSrepositories.3.AddDocker’sGPGkeyforpackageverification.4.SetuptheofficialDockerrepositoryinsourceslist.5.InstallDockerEngine,CLI,andcontainerd.iopackages.6.StartandenableDockerser
Dec 01, 2025 am 05:51 AM
How to find and replace text in a file from the Linux terminal
ToreplacetextinafilefromtheLinuxterminal,usesedforsimplesubstitutionsandperlforadvancedregex;sed-i's/old/new/g'filenamereplacesalloccurrencesinplace,with-i.bakcreatingabackup,andalternativedelimiterslike|handleslashes;addiflagforcase-insensitivematch
Nov 30, 2025 am 04:45 AM
How to add a repository in Linux (Ubuntu/CentOS)
ToaddarepositoryinLinux,useadd-apt-repositoryonUbuntuand.repofilesoryum-config-manageronCentOS.First,installsoftware-properties-commononUbuntuoryum-utilsonCentOS.ThenaddtherepositoryURLviacommandlineorbycreatingarepofilein/etc/yum.repos.d/.Alwaysimpo
Nov 30, 2025 am 03:46 AM
How to start, stop, and enable services in Linux
UsesystemctltomanageLinuxservices:startandstopforimmediatecontrol,enableanddisableforbootsettings,andstatustocheckservicestate.
Nov 29, 2025 am 02:38 AM
How to update your Linux system with yum
RunyumupdatetoupgradeallpackagesonRedHat-basedsystems,ensuringsecurityandstability;useyumcheck-updatetopreviewupdates,updatespecificpackageswithyumupdatepackage-name,andcleancachewithyumcleanalltomaintainsystemperformance.
Nov 29, 2025 am 12:43 AM
How to analyze disk I/O performance in Linux
Useiostatandiotoptomonitorreal-timediskI/O,identifybottlenecksvia%utilandawait,analyzeprocess-levelactivity,inspect/proc/diskstatsand/sys/blockforsystem-widestats,andbenchmarkwithfiotomeasureperformanceundercontrolledworkloads.
Nov 28, 2025 am 05:37 AM
How to pipe commands together in Linux
PipesinLinux,representedby|,passoutputfromonecommandasinputtoanother.Forexample,ls-l|grep".txt"listsfilesandfiltersfor.txtentries.Commonusesincludecatfile.txt|sortforsortingtext,psaux|grepnginxtofindnginxprocesses,df-h|awk'{print$5}'toextra
Nov 28, 2025 am 05:35 AM
How to clear the command line history in Linux
Usehistory-ctoclearcurrentsessionhistoryand>~/.bash_historytoerasesavedhistory,ensuringcompleteremovalofpastcommands.
Nov 27, 2025 am 02:23 AM
How to list all running processes in Linux
Usepsauxforasnapshotofallprocesses;2.Usetopforreal-timeCPU-sortedmonitoring;3.Usehtopforenhanced,interactiveviewing;4.Usepgreptofindspecificprocessesbyname.
Nov 27, 2025 am 12:03 AM
How to enable and disable services on boot in Linux
MostLinuxsystemsusesystemdtomanagestartupservices;checkwithps-p1.Usesystemctlenable/disabletocontrolbootstartup,andsystemctlstart/stopforimmediateaction.OldersystemsuseSysVinittoolslikeupdate-rc.dorchkconfig.Enableaserviceatbootwithsudosystemctlenabl
Nov 26, 2025 am 03:03 AM
How to set up a basic firewall with iptables in Linux
To configure the iptables firewall, first set the default policy to deny all inbound and forwarded traffic and allow outbound traffic; 2. Then allow local loopback and established connection traffic; 3. Then open necessary service ports such as SSH, HTTP, HTTPS, etc.; 4. Optional configuration logs to record discarded packets; 5. Finally, save the rules to prevent restart loss, ensuring system security and not interrupting normal access.
Nov 26, 2025 am 01:24 AM
How to check which version of Linux I am running
Startwithcat/etc/os-releaseorlsb_release-dtofindtheOSversion,astheseprovidecleardistributiondetailsacrossmostsystems;useuname-rforkernelversion,whichdiffersfromtheOSreleasebutisoftenhelpful.
Nov 25, 2025 am 12:51 AM
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