Inkqubo kwi-bash-icandelo le-3

ukuba ikhuselekile yethu ngcamango Siza kufunda izixhobo ezi-2 eziluncedo kakhulu zenkqubo esebenza ngokugqibeleleyo e-Bash. Funda ukwenza imisebenzi kunye nokuchaza imibhobho Isenokubonakala inzima ekuqaleni, kodwa emva koko siza kubona enkulu se benzisi ukuba basinike.

Imibhobho

Ngokukodwa, kwaye ngaphandle kokujika okuninzi kakhulu, umbhobho yindlela evumela ukwalathisa ukuphuma kwenkqubo enye njengegalelo lenye, evumela uthotho lwezibonelelo, ezinje ngokunciphisa imigca yekhowudi, ukuhambisa ngokugcinwa kwezinto iziphumo kunye nokuphucula ukusebenza kweskripthi.

Umbhobho uqondwa ngokubanzi ngokuba nesimboli | evumela ukuba concatenate expression; Nangona isetyenziswa ngokungagqibekanga, zikho ezinye iindlela zokwenza imibhobho.

Umzekelo: phrinta imiyalezo yekernel yakutshanje

#dmesg ikuvumela ukuba ujonge imiyalezo ye-kernel yakutshanje kunye nabaqhubi abalayishiwe # ngexesha lokuqalisa kwenkqubo; umsila uprinta iinxalenye zokugqibela zefayile okanye #command

dmesg | umsila

Nangona zinokuba nzima kangangoko sifuna, ulwakhiwo olusisiseko lombhobho luvumela iziphumo zomyalelo omnye ukuba zisetyenziswe njengegalelo kulandelayo, ezinokubonelela ngegalelo lomyalelo omtsha ukuba siqhubeka nokongeza imibhobho elandelelanayo.

Imisebenzi

Imisebenzi iseti yeengxelo eziqokelelwe ngokudibeneyo ukuze zenziwe ngamanye amaxesha ngaphandle kokuzibhala kwakhona. Kuyalingana nokucinga ukuba xa sifunda ukupheka uhlobo oluthile lokutya siza kubhala iresiphi yayo ephepheni, kwaye sihlandlo ngasinye sifuna ukupheka oko kutya sitya iresiphi endaweni yokubhala iphepha elitsha elinendlela efanayo.

Mhlawumbi eyona nto ibalulekileyo malunga nemisebenzi kukudlula kweeparameter, idatha abaya kuyisebenzisa ukuyenza kunye nokuvelisa iziphumo. Ubume bayo ngolu hlobo lulandelayo:

igama lomsebenzi-igama {

 iinkqubo

}

Umzekelo: umsebenzi obonisa iinkonzo ezisebenza kwiprotocol ye-tcp. Sinokubona indlela yokufaka imibhobho emininzi.

# Sichaza igama lomsebenzi, inokuba yile siyithandayo.

umsebenzi wenkonzo_tcp {

#cat concatenates kwaye ibonisa umxholo we / etc / services folder, which is # that contains all the services with their port port.

# i-grep yokuqala ithatha uluhlu kwaye isuse amagqabantshintshi, kunye -v sibuyisa iziphumo

# i-grep yesibini ibonisa kuphela ezo zinxulumene ne-tcp

 ikati / njl / iinkonzo | grep –v "^ #" | grep tcp

}

Xa sifuna ukwenza lo msebenzi kufuneka siwubize ngegama lawo:

tcp_enkonzo

Kule meko isebenza ngaphandle kweeparameter; Kwimeko apho yenzayo, kufuneka sibongeze ukuze umsebenzi usebenze kakuhle, kungenjalo umsebenzi awuyi kusebenza ngokufanelekileyo. Sebenzisa ukubuya kuvumela umsebenzi ukuba ubuyise ixabiso ngenxa yenkqubo.

Umzekelo: sebenza ngeeparameter zokufaka ezibala inani lamanani ama-2.

#! / bin / ibash
isiphumo sokusebenza ()
{
 # nge let sinokwenza umsebenzi ngaphakathi kwezicatshulwa
 vumela "iziphumo = $ 1 + $ 2"

 # ukubuyela kuvumela ukubuyisa ixabiso elipheleleyo. Nje ukuba ukubuyiswa kwenziwe, ixabiso liya kufakwa ngaphakathi kweedola eziguquguqukayo?
 buyisela iziphumo;
}
 
Umsebenzi we-sum ubiziwe kwaye sidlulisa iiparameter ezimbini zokufaka.

yongeza 2 3

#printa ixabiso le- $? Nge-echo kuvavanya elona xabiso lokwahlukahlukana kwizicatshulwa
echo -e "Iziphumo = $?";