Ngiyisebenzisa kanjani i-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.
Ngiyilanda kanjani i-crontab ku-Ubuntu?
Izinyathelo ezilandelayo okufanele zilandelwe ukusetha umsebenzi we-cron ku-Ubuntu:
- Xhuma kuseva futhi ubuyekeze uhlelo: ...
- Bheka ukuthi iphakheji ye-cron ifakiwe: ...
- Uma i-cron ingafakiwe, faka iphakheji ye-cron ku-Ubuntu: ...
- Qinisekisa ukuthi isevisi ye-cron isebenza: ...
- Lungiselela umsebenzi we-cron ku-ubuntu:
Ingabe i-cron ifakiwe Ubuntu?
Cishe konke ukusatshalaliswa kweLinux kunohlobo oluthile lwe cron efakwe ngokuzenzakalelayo. Kodwa-ke, uma usebenzisa umshini we-Ubuntu lapho i-cron ingafakiwe, ungayifaka usebenzisa i-APT. Ngaphambi kokufaka i-cron emshinini we-Ubuntu, buyekeza inkomba yephakheji yendawo yekhompyutha: i-sudo apt update.
Ngazi kanjani uma i-crontab ifakiwe ku-Linux?
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.
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 .
Likuphi ifayela le-crontab ku-Linux?
Uma udala ifayela le-crontab, lifakwa ngokuzenzakalelayo kulo umkhombandlela we-/var/spool/cron/crontabs futhi unikezwa igama lakho lomsebenzisi. Ungakha noma uhlele ifayela le-crontab lomunye umsebenzisi, noma impande, uma unamalungelo omsebenzisi omkhulu. Faka imiyalo ye-crontab njengoba kuchazwe "ku-Syntax ye-crontab File Entries".
Yini i-crontab Ubuntu?
UCron ukhona i-daemon yesistimu esetshenziselwa ukwenza imisebenzi oyifunayo (ngemuva) ngezikhathi ezimisiwe. … Ihlelwa kusetshenziswa umyalo we-crontab. Imiyalo kufayela le-crontab (kanye nezikhathi zokugijima kwayo) ihlolwa yi-cron daemon, eyisebenzisa ngemuva kwesistimu. Umsebenzisi ngamunye (okuhlanganisa impande) unefayela le-crontab.
Ingabe i-cron idinga ukufakwa?
Ukuze uyifake kufanele kube khona nje iphakethe elilodwa lifakiwe. Bona imiyalo engezansi ukuze ufake futhi usethe i-crontab. Sebenzisa lo myalo ukuze ufake i-crontab, qala i-cron daemon, bese uyivula ekuqaleni.
Ngazi kanjani ukuthi umsebenzi we-cron uyasebenza?
Ukusebenzisa umyalo we-grep, ungabuka ilogu ukuze ubone isikhathi sokugcina lapho iskripthi esithile somsebenzi we-cron senziwa. Uma umsebenzi we-cron ungakhiqizi okukhiphayo okubonakalayo, uzodinga ukuhlola ukuze ubone ukuthi umsebenzi we-cron wenzekile ngempela. Ilogi ibonisa irekhodi lokuthi ifayela laqaliswa nini.
Iyini i-Anacron Linux?
i-anacron uhlelo lwekhompuyutha elenza ukuhlela imiyalo ngezikhathi ezithile, okuyinto ngokwesiko eyenziwa yi-cron, kodwa ngaphandle kokucabangela ukuthi uhlelo lusebenza ngokuqhubekayo. … i-anacron ekuqaleni yaqanjwa futhi yasetshenziswa nguChristian Schwarz e-Perl, ohlelweni lokusebenza lwe-Unix.