Shell代码段-log

【日志相关】

# 创建文件时，需要把变量加上引号，命令输出包含空格
DATE="$(date "+%F %T")"
touch "$DATE.log"

LOG_DIR="/var/log"


cd $LOG_DIR || {
  echo "Cannot change to necessary directory." >&2
  exit 1
}

cat /dev/null > messages && echo "Logs cleaned up."
exit 0

cat<<EOF
#清空日志三种办法
1.  echo " " >test.log
2.  >test.log
3.  cat /dev/null >test.log
EOF