Hello! I have cron to backup my server files to external drive. When I run it manually it runs without problem. But script want not work via cron on Debian 6. I have the same script and crontab on Ubuntu 12.04 and it works without problem. crontab Code: * * * * * /usr/local/ispconfig/server/server.sh > /dev/null 2>> /var/log/ispconfig/cron.log 30 00 * * * /usr/local/ispconfig/server/cron_daily.sh > /dev/null 2>> /var/log/ispconfig/cron.log 20 4 11 * * /1/backup_server.sh > /dev/null error: Code: Apr 11 11:20:01 srv /USR/SBIN/CRON[22590]: (root) CMD (/1/backup_server.sh > /dev/null) Apr 11 11:20:01 srv /USR/SBIN/CRON[22589]: (getmail) CMD (/usr/local/bin/run-getmail.sh > /dev/null 2>> /var/log/ispconfig/cron.log) Apr 11 11:20:01 srv /USR/SBIN/CRON[22585]: (CRON) error (grandchild #22590 failed with exit status 127) backup script: Code: #!/bin/bash work_dir="/" bkup_dir="/media/external/" excl_dir="--exclude=/proc --exclude=/lost+found --exclude=/media/external --exclude=/mnt --exclude=/sys" date=`date +%Y%m%d` cd $work_dir tar cvpzf $bkup_dir/backup_$date.tgz $excl_dir $work_dir I try to change bin/bash to bin/sh but does not help. Permission to script is 750, permission to /media/external 755 Where is a problem? Thank you.