#!/bin/sh

myPath=”/var/log/httpd/”
myFile=”/var /log/httpd/access.log”

#这里的-x 参数判断$myPath是否存在并且是否具有可执行权限
if [ ! -x “$myPath”]; then
  mkdir “$myPath”
fi

#这里的-d 参数判断$myPath是否存在
if [ ! -d “$myPath”]; then
  mkdir “$myPath”
fi

#这里的-f参数判断$myFile是否存在
if [ ! -f “$myFile” ]; then
  touch “$myFile”
fi

#其他参数还有-n,-n是判断一个变量是否是否有值
if [ ! -n “$myVar” ]; then
  echo “$myVar is empty”
  exit 0
fi

#两个变量判断是否相等
if [ “$var1” = “$var2” ]; then
  echo ‘$var1 eq $var2’
else
  echo ‘$var1 not eq $var2’
fi

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