Ngilivula kanjani ifayela le-crontab ku-Linux?
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.
Ngiyibuka kanjani i-crontab ku-Unix?
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.
Ngilivula kanjani ifayela le-crontab?
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.
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 ]
Ngiyisebenzisa kanjani i-crontab?
Ukwenza umsebenzi we-cron, faka umyalo we-crontab batchJob1. txt . Ukuze uqinisekise imisebenzi ehleliwe, faka umyalo crontab -1 . Iphrosesa yenqwaba izocelwa yi-cron daemon ngokuvumelana neshejuli.
Ngisisebenzisa kanjani iskripthi se-crontab?
Yenza ngokuzenzakalelayo ukusebenzisa iskripthi usebenzisa i-crontab
- Isinyathelo 1: Iya kufayela lakho le-crontab. Iya ku-Terminal / interface yakho yomugqa womyalo. …
- Isinyathelo sesi-2: Bhala umyalo wakho we-cron. …
- Isinyathelo sesi-3: Hlola ukuthi umyalo we-cron uyasebenza. …
- Isinyathelo sesi-4: Ukulungisa izinkinga ezingaba khona.
Ngazi kanjani ukuthi i-crontab iyasebenza?
Ukuhlola ukubona ukuthi i-cron daemon iyasebenza yini, sesha izinqubo ezisebenzayo ngomyalo we-ps. Umyalo we-cron daemon uzovela kokuphumayo njenge-crond. Okufakiwe kulokhu okukhiphayo kwe-grep crond kunganakwa kodwa okunye okufakiwe kwe-crond kungabonwa kusebenza njengempande. Lokhu kubonisa ukuthi i-cron daemon iyasebenza.
Ngilubona kanjani uhlu lwe-crontab?
Ukuze uqinisekise ukuthi ifayela le-crontab likhona lomsebenzisi, sebenzisa ifayela le- ls -l umyalo kumkhombandlela /var/spool/cron/crontabs. Isibonelo, isibonisi esilandelayo sibonisa ukuthi amafayela e-crontab akhona kubasebenzisi smith and jones. Qinisekisa okuqukethwe kwefayela le-crontab lomsebenzisi ngokusebenzisa i-crontab -l njengoba kuchazwe kokuthi “Indlela Yokubonisa Ifayela Le-crontab”.
Ngisisebenzisa kanjani iskripthi ngaphandle kwe-crontab?
Ungawuhlela Kanjani Umsebenzi We-Linux Ngaphandle Kwe-Cron
- kuyilapho kuyiqiniso - Cela iskripthi ukuthi sisebenze ngenkathi isimo siyiqiniso, sisebenza njengeluphu eyenza umyalo ukuthi ugijime futhi-futhi-futhi noma usho iluphu.
- yenza - yenza okulandelayo, okungukuthi, yenza umyalo noma isethi yemiyalo engaphambi kwesitatimende.
- usuku >> usuku. …
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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.