Problems with cron jobs Exit 127

[abkrim]

I'm trying to use cronjobs for my backup system.

But all execution get a infamous error:

Jun 26 21:47:01 pro03 /USR/SBIN/CRON[687624]: (root) CMD (root ; cd /root/; sh /root/backup.sh 696 > /dev/null 2>&1)
Jun 26 21:47:03 pro03 /USR/SBIN/CRON[687622]: (CRON) error (grandchild #687624 failed with exit status 127)

I searched on google (Stack, forums, Debian, etc) and not solution for problem.

I put a test:

simple cron for run a bash with this

#!/bin/shecho  "$(date +%Y%m%d) $1" > $(date +%Y%m%d%H%M).txt

line cronjob

*/1 * * * * sh /root/test.sh 300 > /dev/null 2>&1

And not problem

Like run this...

#!/bin/sh
umount /mnt/backups/
case $1 in
    696 )
       echo "Backup kvm696"
       #kvm696 Dropbox 200GB
       lvcreate -L10G -s -n /dev/saXXXX
       ....

Try cronjob

13 2 * * * root sh /root/backup.sh 300 > /dev/null 2>&1
13 2 * * * sh /root/backup.sh 300 > /dev/null 2>&1
13 2 * * * root ; cd /root/; sh /root/backup.sh 300 > /dev/null 2>&1

Any work.

All fail with 127 exit.