1，备份家目录

#!/bin/bash
BACKUP_DIR=/share/nas5/wanghj/data
TIMESTAMP=$(date +%Y%m%d%H%M%S)
tar -zcvf $BACKUP_DIR/backup_$TIMESTAMP.tar.gz /home/wanghj

2，监控系统内存，i/o及存储等

#!/bin/bash
# Set the threshold values
DISK_THRESHOLD=90
LOAD_THRESHOLD=20
MEMORY_THRESHOLD=50
IO_THRESHOLD=50
# User to write the message
USERNAME="wanghj"
# Log file
LOGFILE="/home/wanghj/logfile.log"
while true; do
    # Check disk usage
    DISK_USAGE=$(df /share/backup01/DATA/ | grep / | awk '{ print $5}' | sed 's/%//g')
    if [ "$DISK_USAGE" -gt "$DISK_THRESHOLD" ] ; then
        DISK_MESSAGE="Your root partition remaining free space is critically low. Used: $DISK_USAGE%"
        echo "$(date) - $DISK_MESSAGE" >> $LOGFILE
        echo "$DISK_MESSAGE" | write $USERNAME
    else
        DISK_MESSAGE="Your root partition disk usage is normal. Used: $DISK_USAGE%"
        echo "$(date) - $DISK_MESSAGE" >> $LOGFILE
    fi
    # Check system load
    LOAD=$(uptime | awk -F'load average: ' '{ print $2 }' | cut -d, -f1)
    if (( $(echo "$LOAD > $LOAD_THRESHOLD" |bc -l) )); then
        LOAD_MESSAGE="High load on server. Current load is: $LOAD"
        echo "$(date) - $LOAD_MESSAGE" >> $LOGFILE
        echo "$LOAD_MESSAGE" | write $USERNAME
    else
        LOAD_MESSAGE="Server load is normal. Current load is: $LOAD"
        echo "$(date) - $LOAD_MESSAGE" >> $LOGFILE
    fi
    # Check memory usage
    MEMORY_USAGE=$(free | grep Mem | awk '{print $3/$2 * 100.0}')
    if (( $(echo "$MEMORY_USAGE > $MEMORY_THRESHOLD" |bc -l) )); then
        MEMORY_MESSAGE="High memory usage on server. Current usage is: $MEMORY_USAGE%"
        echo "$(date) - $MEMORY_MESSAGE" >> $LOGFILE
        echo "$MEMORY_MESSAGE" | write $USERNAME
    else
        MEMORY_MESSAGE="Server memory usage is normal. Current usage is: $MEMORY_USAGE%"
        echo "$(date) - $MEMORY_MESSAGE" >> $LOGFILE
    fi
    # Check IO usage
    IO_USAGE=$(iostat -dx | awk 'NR==4 {print $14}')
    if (( $(echo "$IO_USAGE > $IO_THRESHOLD" |bc -l) )); then
        IO_MESSAGE="High I/O usage on server. Current usage is: $IO_USAGE%"
        echo "$(date) - $IO_MESSAGE" >> $LOGFILE
        echo "$IO_MESSAGE" | write $USERNAME
    else
        IO_MESSAGE="Server I/O usage is normal. Current usage is: $IO_USAGE%"
        echo "$(date) - $IO_MESSAGE" >> $LOGFILE
    fi
    # Wait for 10 minutes
    sleep 600
done

可以把该脚本用&挂在后台，该脚本可以让系统资源异常占用或磁盘快满的时候通知你