Ifayela ligcinwe ku-/var/spool/cron/crontabs kodwa kufanele lihlelwe kusetshenziswa umyalo we-crontab.
Agcinwa kuphi amafayela e-crontab?
Amafayela e-crontab agcinwe ku /var/spool/cron/crontabs . Amafayela amaningana e-crontab ngaphandle kwempande anikezwa ngesikhathi sokufakwa kwesoftware ye-SunOS (bona ithebula elilandelayo). Ngaphandle kwefayela le-crontab elizenzakalelayo, abasebenzisi bangakha amafayela e-crontab ukuze bahlele imicimbi yabo yesistimu.
Ngiwabuka kanjani amafayela e-crontab ku-Linux?
Uhlu lwemisebenzi ye-Cron ku-Linux
Ungawathola ngaphakathi /var/spool/cron/crontabs. Amathebula aqukethe imisebenzi ye-cron yabo bonke abasebenzisi, ngaphandle komsebenzisi wempande. Umsebenzisi wempande angasebenzisa i-crontab yesistimu yonke. Kuzinhlelo ezisekelwe ku-RedHat, leli fayela litholakala ku-/etc/cron.
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 ]
Ngiyibona kanjani i-crontab?
2.Ukubuka okufakiwe kwe-Crontab
- Buka okufakiwe Kwamanje Komsebenzisi Ongene Ngemvume I-Crontab : Ukuze ubuke okufakiwe kwakho kwe-crontab thayipha okuthi crontab -l ku-akhawunti yakho ye-unix.
- Buka okufakiwe kwe-Root Crontab : Ngena ngemvume njengomsebenzisi wempande (su – root) bese wenza i-crontab -l.
- Ukuze ubuke okufakiwe kwe-crontab kwabanye abasebenzisi be-Linux : Ngena ngemvume ukuze uqedele futhi usebenzise -u {username} -l.
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).
Ayini amafayela e-crontab?
Ifayela le-crontab lithi ifayela lombhalo elilula eliqukethe uhlu lwemiyalo okufanele isetshenziswe ngezikhathi ezithile. Ihlelwa kusetshenziswa umyalo we-crontab. Imiyalo kufayela le-crontab (kanye nezikhathi zokugijima kwayo) ihlolwa yi-cron daemon, eyisebenzisa ngemuva kwesistimu.
Ngazi kanjani ukuthi umsebenzi we-cron uphumelele?
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 .
Ngiyibona kanjani yonke i-crontab yabasebenzisi?
Ngaphansi kwe-Ubuntu noma i-debian, ungabuka i-crontab nge /var/spool/cron/crontabs/ bese kuba nefayela lomsebenzisi ngamunye phakathi. Lokho okwenzelwe ama-crontab aqondene nabasebenzisi kuphela kunjalo. Ku-Redhat 6/7 kanye ne-Centos, i-crontab ingaphansi /var/spool/cron/. Lokhu kuzobonisa konke okufakiwe kwe-crontab kubo bonke abasebenzisi.
Ngikuhlela kanjani ukungena kwe-crontab?
Ungayakha noma uhlele kanjani ifayela le-crontab
- Dala ifayela elisha le-crontab, noma hlela ifayela elikhona. $ 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 ]
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.
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.