Jang go Seta Dikgato tsa Cron mo Linux Server

Cron ke scheduler ya tloaelo ya Linux go dirisa diskripte le ditaelo ka nako e e rulagantsweng — backup, go phimola cache, go lekola setifikeiti, jj.

Cron syntax

Mola o mongwe o na le mafelo a mabedi a bosupa le taelo:

# ┌──────── minute (0-59)
# │ ┌────── hour (0-23)
# │ │ ┌──── day of month (1-31)
# │ │ │ ┌── month (1-12)
# │ │ │ │ ┌─ day of week (0-7, 0 and 7 = Sunday)
# │ │ │ │ │
# * * * * * command

# Every day at 3:00 AM:
0 3 * * * /usr/local/bin/backup.sh

# Every 15 minutes:
*/15 * * * * /usr/local/bin/check.sh

Go rulaganya crontab

crontab -e bakeng sa modirisi wa jaanong. Ditiro tsa system — ka sudo:

# Edit your user crontab
crontab -e

# Edit root crontab
sudo crontab -e

# List current jobs
crontab -l
sudo crontab -l

Mehlala e e tlwaelegileng

• 0 2 * * * — backup ya letsatsi le letsatsi ka 2:00
• 0 */6 * * * — nako le nako ka diura 6
• 0 0 * * 0 — Mošupologo bosigo
• */5 * * * * — nako le nako ka metsotso e mehlano (bewareng ka load)
• @reboot /path/script.sh — morago ga go reboot
• @daily /usr/bin/certbot renew --quiet — tshupo ya SSL ya letsatsi

Di-log le go rarabolola

Romela output go ya kwa log file go bona diphoso:

0 3 * * * /usr/local/bin/backup.sh >> /var/log/backup-cron.log 2>&1

# View cron execution in system log:
grep CRON /var/log/syslog   # Ubuntu
grep CRON /var/log/cron      # CentOS

Dikgakololo

• Dirisa ditsela tse di feletseng mo ditaelong tsa cron
• Leka diskripte ka seatla pele ga crontab
• MAILTO=email mo crontab bakeng sa diphoso (fa poso e setilwe)
• Akanyetsa systemd timers bakeng sa maemo a a raraganeng
• O se ka wa dirisa ditiro tse di rarurang nako le nako