The file is stored in /var/spool/cron/crontabs but should only be edited using the crontab command.
Where are crontab files stored?
The crontab files are stored in /var/spool/cron/crontabs . Several crontab files besides root are provided during SunOS software installation (see the following table). Besides the default crontab file, users can create crontab files to schedule their own system events.
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.
How do I edit crontab entry?
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.