Centos 7 备份脚本 cron 问题

问：

我找到了一个很棒的脚本来每天创建一个完整的 Centos 7 备份：

First, log in as root and create a directory where our backups will land:

mkdir /backups

Now, we will create the following shell script file and open it for editing:

mkdir ~/bin;vi ~/bin/mybackup.sh

Put in the following content, replacing /backups in the environment variable DEST and SOURCE with the one you would like to backup as well as the recipient’s EMAIL:

#!/bin/bash
SBJT="cron backup report for `hostname -s` from $(date +%Y%m%d:%T)"
FROM=root@domain
[email protected]
SOURCE=/root
DEST=/backups
LFPATH=/tmp
LF=$LFPATH/$(date +%Y%m%d_%T)_logfile.log
rsync --delete --log-file=$LF -avzq $SOURCE $DEST
(echo "$SBJT"; echo; cat $LF ) | sendmail -f $FROM -t $EMAIL

Make the script executable:

chmod a+x /root/bin/mybackup.sh

Now, open crontab using:

crontab -e

Next, create the following entry by adding the following line to the end of the document, then save and close it:

30 20 * * * /root/bin/mybackup.sh

如果我手动启动脚本，它可以正常工作，但通过 cron/root/bin/mybackup.sh

[email protected]
30 20 * * * /root/bin/mybackup.sh

它发送一封带有错误的奇怪邮件，并且不会进行备份。我不赞成，因为当我进入时，我的收件箱中会收到邮件。/root/bin/mybackup.sh: line 9: sendmail: command not foundecho "Subject: sendmail test" | sendmail -v [email protected]