Ukuze uhlole ukuze ubone 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 kukhombisa ukuthi i-cron daemon iyasebenza.
Ngazi kanjani uma umsebenzi we-cron usebenzisa Ubuntu?
4 Izimpendulo. Uma ufuna ukwazi ukuthi iyasebenza ungenza into efana nale Isimo se-sudo systemctl cron noma i-ps aux | grep cron .
Ngazi kanjani uma umsebenzi we-cron uyasebenza?
Uyibhala Kanjani Yonke Imisebenzi Ye-Cron Esebenzayo Esebenzayo. Imisebenzi ye-Cron ivamise ukutholakala kuma-spool directory. Agcinwa ematafuleni abizwa ngokuthi ama-crontabs. Ungawathola ngaphakathi /var/spool/cron/crontabs.
Ngingabona kanjani ukuthi i-Magento 2 iyasebenza noma cha?
Ukuhlola imisebenzi ye-cron emisiwe ongayisebenzisa umyalo crontab -l in ukuphela kwakho futhi uzobona imisebenzi ye-cron imisiwe kanye nesikhathi azosebenza ngaso. Ngokusekelwe emisebenzini ye-cron emisiwe, ungabuka isimo semisebenzi ye-cron(elahlekile, esalindiwe noma impumelelo) kuthebula le-cron_schedule.
Ngazi kanjani uma umsebenzi we-cron wehlulekile?
Ezinye izindlela
Ngokwale mpendulo umuntu angathola amaphutha e-cronjob kufayela lelogi esebenzisa ukuqondisa kabusha. Kodwa udinga ukusetha ukuqondisa kabusha ngomsebenzi wakho we-cron futhi ucacise ifayela lokungena uwedwa. Futhi ifayela /var/log/syslog ihlale ikhona ukuze uhlole ukuthi umsebenzi wakho we-cron usebenza ngendlela obulindele ngayo noma cha.
Ngiyisebenzisa kanjani i-crontab?
Inqubo
- Dala ifayela le-cron lombhalo we-ASCII, njenge-batchJob1. txt.
- Hlela ifayela le-cron usebenzisa isihleli sombhalo ukuze ufake umyalo wokuhlela isevisi. …
- Ukuze uqalise umsebenzi we-cron, faka umyalo we-crontab batchJob1. …
- Ukuze uqinisekise imisebenzi ehleliwe, faka umyalo crontab -1 . …
- Ukuze ususe imisebenzi ehleliwe, thayipha u-crontab -r .
Ngiyibona kanjani yonke imisebenzi ye-cron 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.
Ngiyibona kanjani yonke imisebenzi ye-cron?
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.
I-Logrotate igijima kangaki?
Ngokuvamile, i-logrotate iqhutshwa njenge umsebenzi wansuku zonke we-cron. Ngeke iguqule ilogu izikhathi ezingaphezu kwesisodwa ngosuku olulodwa ngaphandle kwalapho umbandela walolo logi usekelwe kusayizi welogi futhi i-logrotate isetshenziswa izikhathi ezingaphezu kwesisodwa usuku ngalunye, noma ngaphandle kwalapho kusetshenziswa inketho ethi -f noma -force. Noma iyiphi inombolo yamafayela okumisa ingase inikezwe kulayini womyalo.
I-cron D isebenza kangaki?
Ku-/etc/anacrontab, izingxenye ezigijimayo zisetshenziselwa ukuqalisa i-cron. nsuku zonke imizuzu emi-5 ngemuva kokuqala kwe-anacron, futhi cron. masonto onke ngemva kwemizuzu eyi-10 (kanye ngesonto), kanye ne-cron. njalo ngenyanga ngemva kwe-15 (kanye ngenyanga).