Defer until load is low cron
Run only when load avg drops below 1.5; note: atd must be running
batch <<< '/opt/heavy-reindex.sh'
more cron
all 8 commands →
Dump another user's crontab
crontab -l -u <name> 2>/dev/null || echo 'no crontab'
Run job at boot
( crontab -l 2>/dev/null; echo '@reboot /usr/local/bin/warmup.sh' ) | crontab -
Pipe cron output to syslog
*/5 * * * * /opt/job.sh 2>&1 | /usr/bin/logger -t job
MAILTO and PATH header
crontab - <<'EOF'
MAILTO=ops@example.com
PATH=/usr/local/bin:/usr/bin:/bin
0 3 * * * backup.sh
EOF
Test run-parts dry run
run-parts --test /etc/cron.daily