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我有一个 mysqlbackup 脚本，我希望它能够： - 单独备份所有数据库 - 将任何错误记录到文件 - 通过电子邮件发送该文件

我现在拥有的是：

\#!/bin/sh

TIMESTAMP=$(date +"%F-%H-%M")
BACKUP_DIR="/mnt/usb/mysql/"
MYSQL_USER="backup"
MYSQL=/usr/bin/mysql
MYSQL_PASSWORD="*****"
MYSQLDUMP=/usr/bin/mysqldump
EMAIL=*****
RETENTION="+14"
MSG=/tmp/mysqlbackup.messages

echo "Date: $(date)">$MSG
echo "Hostname: $(hostname)" >>$MSG
echo "Backup script has run. [don't worry, it won't get far!]" >>$MSG
echo " ----- ----- ----- " >> $MSG
echo " " >> $MSG
echo " " >> $MSG

mkdir -p "$BACKUP_DIR/$TIMESTAMP"

databases=`$MYSQL --user=$MYSQL_USER -p$MYSQL_PASSWORD -e "SHOW DATABASES;" | grep -Ev "(Database|information_schema|performance_schema)"`

for db in $databases; do
        $MYSQLDUMP --force --opt --user=$MYSQL_USER -p$MYSQL_PASSWORD --databases $db | gzip > "$BACKUP_DIR/$TIMESTAMP/$db.gz"
        echo "Backing up: $db" >> $MSG
done

echo " " >> $MSG
echo " " >> $MSG
echo " ----- ----- ----- " >> $MSG
echo " " >> $MSG
echo " " >> $MSG

find $BACKUP_DIR* -mtime $RETENTION -exec rm {} \;  >> $MSG 2>&1

mail  -s "MySQL Backup script has run" "$EMAIL" <$MSG
rm -f $MSG

这非常完美，但是，我将这些错误/警告发送到控制台：

[root@linux scripts]# ./mysqldump-all-databases.sh
mysqldump: Error 1194: Table 'XXXXX' is marked as crashed and should be repaired when dumping table `XXXXX` at row: 81052
mysqldump: Error 1194: Table 'XXXXX' is marked as crashed and should be repaired when dumping table `XXXXX` at row: 68532
-- Warning: Skipping the data of table mysql.event. Specify the --events option explicitly.

如何将它们记录到 $MSG 文件以通过电子邮件发送？更好的是，如果发现错误，是否可以更改电子邮件主题[所以它不会被忽略]

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