2

我遇到了一个特殊的问题，即 rsync 命令在通过 crontab 执行时没有运行。
下面是代码：

#!/bin/sh -x
PATH=/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/mysql/bin:/opt/android-sdk-linux/tools:/opt/android-sdk-linux/platform-tools:~/usr/lib/jvm/jdk-6/bin
/bin/sh /etc/profile
MyUSER="root"       # USERNAME
MyPASS="password"         # PASSWORD
MyHOST="localhost"  # Hostname
Password="" #Linux Password

MYSQL="$(which mysql)"
if [ -z "$MYSQL" ]; then
echo "Error: MYSQL not found"
exit 1
fi
MYSQLADMIN="$(which mysqladmin)"
if [ -z "$MYSQLADMIN" ]; then
    echo "Error: MYSQLADMIN not found"
    exit 1
fi
CHOWN="$(which chown)"
if [ -z "$CHOWN" ]; then
    echo "Error: CHOWN not found"
    exit 1
fi
CHMOD="$(which chmod)"
if [ -z "$CHMOD" ]; then
    echo "Error: CHMOD not found"
    exit 1
fi

GZIP="$(which gzip)"
if [ -z "$GZIP" ]; then
    echo "Error: GZIP not found"
    exit 1
fi
CP="$(which cp)"
if [ -z "$CP" ]; then
    echo "Error: CP not found"
    exit 1
fi
MV="$(which mv)"
if [ -z "$MV" ]; then
    echo "Error: MV not found"
    exit 1
fi
RM="$(which rm)"
if [ -z "$RM" ]; then
    echo "Error: RM not found"
    exit 1
fi
RSYNC="$(which rsync)"
if [ -z "$RSYNC" ]; then
    echo "Error: RSYNC not found"
    exit 1
fi

MYSQLBINLOG="$(which mysqlbinlog)"
if [ -z "$MYSQLBINLOG" ]; then
    echo "Error: MYSQLBINLOG not found"
    exit 1
fi
# Get data in dd-mm-yyyy format
NOW="$(date +"%d-%m-%Y-%T")"

DEST="/home/db-backup"
mkdir $DEST/Increment_backup.$NOW
LATEST=$DEST/Increment_backup.$NOW
$MYSQLADMIN -u$MyUSER -p$MyPASS flush-logs
newestlog=`ls -d /usr/local/mysql/data/mysql-bin.?????? | sed 's/^.*\.//' | sort -g | tail -n 1`
echo $newestlog
for file in `ls /usr/local/mysql/data/mysql-bin.??????`
do
        if [ "/usr/local/mysql/data/mysql-bin.$newestlog" != "$file" ]; then
     echo $file
     echo $Password | sudo -S $CHMOD 0777 $file
         #sudo $MYSQLBINLOG $file>$file.$NOW.sql
     $CP "$file" $LATEST
     #$RM "$file.$NOW.sql"
     #$MV $file.sql.gz /$LATEST
        fi
done
for file1 in `ls $LATEST/mysql-bin.??????`
do
 $MYSQLBINLOG $file1>$file1.$NOW.sql 
 $GZIP -9 "$file1.$NOW.sql"     
 $RM "$file1"
done
 $RSYNC -v -e ssh $LATEST abc@192.168.1.9:/home/rsync-backup/
#FILE=$LATEST/"mysql-bin.??????"
#$MYSQLBINLOG $FILE>$FILE.$NOW.sql
#$GZIP -f "$FILE.$NOW.sql"
pwd

手动运行代码时会发生 Rsync，但通过 crontab 运行时会失败。其余命令工作正常。从日志中我得到了这些信息：

Host key verification failed.^M
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: unexplained error (code 255) at io.c(600) [sender=3.0.6]
4

3 回答 3

3

这基本上是由于 ssh 的第一次身份验证问题。如果您要确保手动将主机添加到 known_hosts 或期望脚本中的提示，它应该可以工作。

The authenticity of host '[IP]:20022 ([IP]:22)' can't be established.
RSA key fingerprint is bc:87:52:cf:ac:3e:67:74:1b:e1:0b:e3:e2:06:d8:21.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[IP]:22' (RSA) to the list of known hosts
于 2013-11-25T07:10:29.613 回答
1

这种错误通常是由于环境的差异造成的。一个好的故障排除步骤是在程序开始时运行“env”并比较 cron 和非 cron 版本。

您还应该将命令作为“sh -x”运行，这将显示所有扩展，这将有助于确定哪个变量设置不正确。

于 2013-02-09T20:13:37.653 回答
0

这可能是您的 HOME 目录已加密。

如果您的用户已登录，则它可以工作，但是当它是 cron 时，即使它正在执行同一用户，它也无权访问您的$HOME/.ssh目录

于 2013-03-08T17:06:45.070 回答