linux bash 清空日志

#! /bin/bash

log_dir=/var/log root_uid=0 if [ "$UID" -ne $root_uid ];then echo "This account not permission to execute." exit 1 fi

cd $log_dir if [ $? -ne 0 ];then echo "This path not exists." exit 1 else cat /dev/null > messages echo "clear logs jobs finished." fi