в этой теме были варианты восстановления, ну да ладно...
первый апплет busybox`a, второй - пакет
~ # crond -h
crond: invalid option -- 'h'
BusyBox v1.31.0 () multi-call binary.
Usage: crond -fbS -l N -L LOGFILE -c DIR
-f Foreground
-b Background (default)
-S Log to syslog (default)
-l N Set log level. Most verbose 0, default 8
-L FILE Log to FILE
-c DIR Cron dir. Default:/opt/var/spool/cron/crontabs
~ # opkg info cron
Package: cron
Version: 4.1-3
Depends: libc, libssp, librt, libpthread
Status: unknown ok not-installed
Section: utils
Architecture: mipsel-3.4
Size: 34839
Filename: cron_4.1-3_mipsel-3.4.ipk
Description: Standart Vixie cron, with cron.d addition.
~ #