Shell脚本定时备份清除运行系统日志的代码

#!/bin/sh
#backup eoslog
#author rhao
#date 2008-12-27

#定义环境变量
EOS_HOME=/home/eos
SAS_HOME=/home/eos/SAS

# 测试主辅结点
if test -d '/home/eos/SAS/SAS1_web1'
then
        SAS_LOG_HOME=$SAS_HOME/SAS1_web1/SAS_Domain/bin
else
        SAS_LOG_HOME=$SAS_HOME/SAS2_web1/SAS_Domain/bin
fi

# 定义并创建日志备份目录
SAS_LOG_BAK_HOME=$EOS_HOME/saslog/
mkdir -p $SAS_LOG_BAK_HOME

# 切换目录为EOS日志文件目录
cd $SAS_LOG_HOME

# 获取当前系统日期
TODAY=`date +%Y%m%d`

# 备份当前日志
cp nohup.out $SAS_LOG_BAK_HOME/$TODAY.log

# 清除当前日志
touch nohup.null
cp nohup.null nohup.out -f
rm nohup.null

# 清除七天前的日志
for rmfile in `find $SAS_LOG_BAK_HOME -ctime +7 `;
        do /bin/rm -rf $rmfile;
done

[eos@xcfwbz1 SAS]$ crontab -l
59 23 * * * /home/eos/SAS/backup_eoslog.sh

#!/bin/bash
LOG_DIR=/var/log
ROOT_UID=0
LINES=50
E_XCD=66
E_NOTROOT=67
if [ "$UID" -ne "$ROOT_UID" ]
then
echo "Must be root to run this script."
exit $E_NOTROOT
fi
if [ -n "$1" ]
then
lines=$1
else
lines=$LINES
fi
cd $LOG_DIR
if [ `pwd` != "$LOG_DIR" ]

then
echo "Can't change to $LOG_DIR."
exit $E_XCD
fi
tail -$lines messages > mesg.temp
mv mesg.temp messages
echo "Logs cleaned up."
exit 0