Ngiwaqhathanisa kanjani amanani amabili aguquguqukayo ku-Unix?
Qhathanisa Izinombolo ku-Linux Shell Script
- num1 -eq num2 hlola ukuthi inombolo yoku-1 ilingana nenombolo yesi-2.
- num1 -ge num2 ihlola ukuthi inombolo yoku-1 inkulu yini noma ilingana nenombolo yesi-2.
- num1 -gt num2 ihlola ukuthi inombolo yoku-1 inkulu yini kunenombolo yesi-2.
- num1 -le num2 ihlola ukuthi inombolo yoku-1 ingaphansi noma ilingana nenombolo yesi-2 yini.
Uqhathanisa kanjani okuguquguqukayo okubili embhalweni?
Ungasebenzisa the [ umyalo (uyatholakala futhi njengokuhlola ) noma [[ ... ]] I-syntax ekhethekile ukuqhathanisa okuguquguqukayo okubili. Qaphela ukuthi udinga izikhala ngaphakathi kubakaki: amabakaki ayithokheni ehlukile ku-syntax yegobolondo.
Uhlola kanjani ukuthi okuguquguqukayo okubili kuyalingana kuskripthi segobolondo?
Bash - Bheka ukuthi Izintambo Ezimbili Ziyalingana
- Sebenzisa == opharetha nge-bash uma isitatimende ukuze uhlole ukuthi izintambo ezimbili ziyalingana yini.
- Ungasebenzisa futhi != ukuhlola ukuthi izintambo ezimbili azilingani.
- Kufanele usebenzise isikhala esisodwa ngaphambi nangemuva kwama-opharetha == kanye no-!=.
Ingabe singaqhathanisa okuguquguqukayo okubili?
Ungaqhathanisa okuguquguqukayo oku-2 ku- uma isitatimende sisebenzisa i- == opharetha.
Iyini inhloso ku-Unix?
I-Unix iyisistimu yokusebenza. It isekela ukwenza izinto eziningi nokusebenza kwabasebenzisi abaningi. I-Unix isetshenziswa kakhulu kuzo zonke izinhlobo zezinhlelo zekhompiyutha ezifana nedeskithophu, ilaptop, namaseva. Ku-Unix, kune-Graphical interface yomsebenzisi efana namawindi asekela ukuzulazula okulula nendawo esekelayo.
Ngiwaqhathanisa kanjani amagama amabili kuskripthi segobolondo?
Ukuqhathanisa Opharetha
Uma uqhathanisa izintambo ku-Bash ungasebenzisa ama-opharetha alandelayo: intambo1 = intambo2 kanye ne-string1 == string2 – Umsebenzisi wokulingana ubuyisela iqiniso uma ama-operands elingana. Sebenzisa = opharetha ngesivivinyo [ umyalo. Sebenzisa i- == opharetha ngo [[ umyalo wokufanisa iphethini.
Ungakumemezela kanjani ukuguquguquka kwegobolondo?
I-Unix / Linux - Ukusebenzisa Okuguquguqukayo kweShell
- Ukuchaza Okuguquguqukayo. Okuguquguqukayo kuchazwa kanje − variable_name=variable_value. …
- Ukufinyelela Amagugu. Ukuze ufinyelele inani eligcinwe kokuguquguqukayo, qalisa igama laso ngophawu lwedola ($) − ...
- Okuguquguqukayo okufundwayo kuphela. …
- Ukusetha Okuguquguqukayo.
Ungamisa kanjani okuguquguqukayo ku-bash?
Indlela elula yokusetha okuguquguqukayo kwemvelo ku-Bash iwukuba sebenzisa igama elingukhiye elithi "thekelisa" elilandelwa igama eliguquguqukayo, uphawu olulinganayo kanye nenani elizonikezwa okuguquguqukayo kwemvelo.
Yini i-bin sh Linux?
/bin/sh ngu okusebenzisekayo okumelela igobolondo lesistimu futhi ngokuvamile isetshenziswa njengesixhumanisi esingokomfanekiso esikhomba kokusebenzisekayo kunoma yiliphi igobolondo eliyigobolondo lesistimu. Igobolondo lesistimu ngokuyisisekelo igobolondo elizenzakalelayo okufanele iskripthi silisebenzise.
Ngisisebenzisa kanjani iskripthi se-bash?
Yenza I-Bash Script Isebenze
- 1) Dala ifayela lombhalo elisha nge-. sh isandiso. …
- 2) Engeza #!/bin/bash phezulu kwayo. Lokhu kuyadingeka engxenyeni ethi "yenza isebenze".
- 3) Engeza imigqa ongayibhala ngokujwayelekile kulayini womyalo. …
- 4) Emgqeni womyalo, sebenzisa i-chmod u+x YourScriptFileName.sh. …
- 5) Yigijime noma nini lapho udinga!