I-Linux yesibili-isigaba sokuqalisa
Context:Ama-bootloader wesigaba sesibili, afana ne-GNU GRUB, i-rEFInd, i-BOOTMGR, i-Syslinux, i-NTLDR noma i-iBoot, awazona izinhlelo zokusebenza, kodwa ayakwazi ukulayisha uhlelo lokusebenza ngokufanele futhi adlulisele ukusebenza kulo; uhlelo lokusebenza luziqala ngokwalo futhi lungalayisha abashayeli bedivayisi abengeziwe. Isilayidi sesibili sokuqalisa asidingi abashayeli ukuze sisebenze, kodwa singasebenzisa izindlela zokufinyelela ezijwayelekile ezinikezwa yi-firmware yesistimu njenge-BIOS noma i-Open Firmware, noma kunjalo ngokujwayelekile ngokusebenza okuvinjelwe kwe-hardware nokusebenza okuphansi.  Izilayishi eziningi zokuqalisa zingahlelwa ukuze zinikeze umsebenzisi izinketho eziningi zokuqalisa. Lezi zinketho zingabandakanya izinhlelo zokusebenza ezahlukene (ukuze kuqalwe kabili noma kaningi kusuka kuma-partitions noma amadrayivu ahlukene), izinguqulo ezahlukene zohlelo lokusebenza olufanayo (uma inguqulo entsha inezinkinga ezingalindelekile), izinketho ezahlukene zokulayisha uhlelo lokusebenza (isibonelo, ukuqala kumodi yokutakula noma ephephile), kanye nezinye izinhlelo ezizimele ezingasebenza ngaphandle kohlelo lokusebenza, njengama-memory testers (isibonelo, memtest86 +), igobolondo eliyisisekelo (njengase-GNU GRUB), noma ngisho nemidlalo (bheka Uhlu lwemidlalo ye-PC Booter). Abanye abalayishi bokuqalisa bangalayisha futhi abanye abalayishi bokuqalisa; isibonelo, i-GRUB ilayisha i-BOOTMGR esikhundleni sokulayisha i-Windows ngqo. Ngokuvamile, ukhetho olungaguquki lukhethwa kusengaphambili ngokulibaziseka kwesikhathi lapho umsebenzisi engacindezela khona ukhiye ukushintsha ukukhetha; ngemuva kwalokhu kubambezeleka, ukhetho olungaguquki luvele luvele ngokuzenzakalelayo ukuze ukuqala okujwayelekile kwenzeke ngaphandle kokuxhumana.  Inqubo yokuqalisa ingabhekwa njengephelele lapho ikhompyutha isilungele ukusebenzisana nomsebenzisi, noma uhlelo lokusebenza lukwazi ukusebenzisa izinhlelo zohlelo noma izinhlelo zokusebenza.  Izinhlelo eziningi ezifakiwe kumelwe ziqale ngokushesha. Ngokwesibonelo, ngokuvamile akwamukeleki ukulinda umzuzu owodwa ukuze kuqale ithelevishini yedijithali noma umshini wokuzulazula we-GPS. Ngakho-ke, amadivayisi anjalo anezinhlelo zesofthiwe ku-ROM noma inkumbulo ye-flash ukuze idivayisi iqale ukusebenza ngokushesha; ukulayishwa okuncane noma akukho okudingekayo, ngoba ukulayishwa kungalungiselelwa kusengaphambili futhi kugcinwe ku-ROM lapho idivayisi yenziwa.  Izinhlelo ezinkulu nezinkimbinkimbi zingase zibe nezinqubo zokuqalisa eziqhubeka ngezigaba eziningi kuze kube yilapho ekugcineni uhlelo lokusebenza nezinye izinhlelo zilayishwa futhi zilungele ukuqhutshwa. Ngenxa yokuthi izinhlelo zokusebenza zenzelwe ukuba zingaze ziqale noma zime, i-boot loader ingase ilayishe uhlelo lokusebenza, izihlele ngokwayo njengenqubo nje ngaphakathi kwalolo hlelo, bese idlulisela ukulawula kuhlelo lokusebenza. I-boot loader iphela ngokujwayelekile njenganoma iyiphi enye inqubo.
I-bootloader enezigaba ezimbili empeleni iqukethe ama-bootloader amabili alandelanayo. Eyokuqala incane ngenjongo yokulayisha eyesibili. Eyesibili ingase ibe nayo yonke ikhodi edingekayo ukuze ilayishe i-kernel. I-GRUB isebenzisa izigaba ezimbili (noma mhlawumbe ezintathu).