Ngilihlela kanjani ifayela le-crontab ku-Linux?
Ungayakha noma uhlele kanjani ifayela le-crontab
- Dala ifayela elisha le-crontab, noma hlela ifayela elikhona kakade. # crontab -e [ igama lomsebenzisi ] ...
- Engeza imigqa yomyalo kufayela le-crontab. Landela i-syntax echazwe ku-Syntax ye-crontab File Entries. …
- Qinisekisa izinguquko zefayela lakho le-crontab. # crontab -l [ igama lomsebenzisi ]
Uwuhlela kanjani umsebenzi we-cron?
Qaphela: Ukuhlela ifayela le-crontab usebenzisa Umhleli weNano, ungafaka ngokuzithandela umyalo othi EDITOR=nano crontab -e. I-Vi inemodi yokufaka kanye nemodi yomyalo. Ungakwazi ukuvula imodi yokufaka usebenzisa ukhiye we-i. Izinhlamvu ezifakiwe zizofakwa ngokushesha embhalweni kule modi.
Amafayela e-crontab alondolozwa kuphi?
Amafayela e-Crontab ahlala phakathi /var/spool/cron/crontabs/ ngaphansi kwegama lomsebenzisi lomuntu noma i-ID yomsebenzisi. Njengoba izimo zingavela lapho i-crontab etholakala lapha ingasaxhunywanga ku-akhawunti yakho yokungena ngemvume, kunconywa ukuthi ulondoloze ikhophi kuhla lwemibhalo yakho yasekhaya, ithi /home/usid/.
Ngingakwazi ukuhlela njll crontab?
Leli yithebula le-cron yesistimu (ifayela le-crontab), awukho umqondo wokucela umsebenzisi lapha njenge umsebenzisi omkhulu kuphela ongahlela leli fayela, ingabe leli fayela lidinga izinkambu ezingu-7, nenkambu yegama lomsebenzisi eyengeziwe esikhaleni/ithebhu ehlukaniswe inkambu yesi-6. Lokhu kuyiqiniso kuwo wonke amafayela we-cron ku-/etc/cron.
Likuphi ifayela le-crontab ku-Linux?
Ifayela le-crontab lizofakwa /var/spool/cron/crontabs . Qinisekisa ifayela le-crontab ngokusebenzisa umyalo we-crontab -l.
Iyini ukusetshenziswa kwe-crontab ku-Linux?
I-crontab iwuhlu lwemiyalo ofuna ukuyisebenzisa ngohlelo olujwayelekile, kanye negama lomyalo osetshenziswa ukuphatha lolo hlu. I-Crontab imele “itafula le-cron,” ngoba isebenzisa isihleli somsebenzi cron ukwenza imisebenzi; I-cron ngokwayo iqanjwe ngegama elithi “chronos,” igama lesiGreki elisho isikhathi.
Ngiyishintsha kanjani i-sudo crontab?
I-crontab -e ihlela i-crontab yomsebenzisi wamanje, ngakho-ke noma yimiphi imiyalo equkethwe ngaphakathi izosetshenziswa njengomsebenzisi oyi-crontab oyihlelayo. I-sudo crontab -e izohlela abasebenzisi bempande i-crontab, ngakho-ke imiyalo engaphakathi izoqhutshwa njengempande. Ukuze ungeze ku-cduffin, sebenzisa umthetho omncane wezimvume lapho usebenzisa i-cronjob yakho.
Ngiwuvula kanjani umsebenzi we-cron?
Ivula i-Crontab
Sebenzisa umyalo we-crontab -e ukuze uvule ifayela le-crontab le-akhawunti yakho yomsebenzisi. Imiyalo kuleli fayela isebenza nezimvume ze-akhawunti yakho yomsebenzisi. Uma ufuna umyalo wokusebenzisa izimvume zesistimu, sebenzisa umyalo we-sudo crontab -e ukuvula ifayela le-crontab le-akhawunti yezimpande.
Ngazi kanjani ukuthi umsebenzi we-cron uyasebenza?
Indlela elula yokuqinisekisa ukuthi i-cron izamile ukusebenzisa umsebenzi ukumane hlola ifayela lokungena elifanele; amafayela welogi nokho angahluka kusuka kusistimu kuya ohlelweni. Ukuze sinqume ukuthi yiliphi ifayela lokungena eliqukethe izingodo ze-cron singamane sihlole ukuvela kwegama elithi cron kumafayela okungena ngaphakathi /var/log .
Ngilenza kanjani isipele ifayela le-crontab?
Ungamane wenze isipele lonke lwemibhalo /var/spool/cron. Iqukethe wonke ama-crontabs abo bonke abasebenzisi. Ungakwazi ukugijima ngezikhathi ezithile crontab -l > my_crontab. isipele ukuze wenze isipele i-crontab ibe ifayela.
Ngikulondoloza kanjani ukuhlela kwe-crontab?
Ulihlela futhi ulondoloze kanjani ifayela le-crontab ku-Linux?
- cindezela u-esc.
- cindezela u-i (ukuthi “faka”) ukuze uqale ukuhlela ifayela.
- namathisela umyalo we-cron efayeleni.
- cindezela u-esc futhi ukuze uphume kumodi yokuhlela.
- thayipha :wq ukuze ugcine (w - bhala) bese uphuma (q - quit) ifayela.
Ingabe i-crontab isebenza njengempande?
2 Izimpendulo. Bona zonke zigijima njengempande . Uma udinga okunye, sebenzisa i-su kuskripthi noma wengeze okufakiwe kwe-crontab ku-crontab yomsebenzisi ( man crontab ) noma i-crontab ebanzi yohlelo (engingakwazi ukukutshela indawo yayo ku-CentOS).