linux查看目录的剩余可用空间

Linux中暂时没发现现成的命令，因此可用用shell脚本结合df -h命令来实现

 

实现思路：

1、输入一个路径

2、获得df -h信息

3、保存根目录的可用空间大小

4、除了跟根目录之外的其他挂载目录匹配路径，如果匹配成功，取该路径的可用空间，或者取根目录的可用空间

 

shell脚本：

#!/bin/bash

#########################################

#author:

#    yxj

# BLOG:

#    http://blog.csdn.net/u010317005

#usage:

#  ./get_dir_avail_space [dir]

#e.g:

#   ./get_dir_avail_space /root

#   ./get_dir_avail_space 

#########################################

############get test path###############

if [ -z $1 ];then

 read -p "input the path(e.g: /root):" path

else

 path=$1

fi

if [ "${path:0:1}" = "/" ];then 

  if [ ! -d ${path} ];then

   # echo "create new path:${path}"

    mkdir -p ${path}

  fi

 # echo "absolute directory:${path}"

else

  pwd=`pwd`

  if [ ! -d "${pwd}/${path}" ];then

  # echo "create new path:${pwd}/${path}"

   mkdir -p ${pwd}/${path}

  fi

  path=${pwd}/${path}

 # echo "path:${path}"

fi

##########get data from df -h#############

df -h | while read line

do 

  #for var in $line

  line_path=`echo ${line} | awk -F' ' '{print $6}'`

  line_avail=`echo ${line} | awk -F' ' '{print $4}'`

   if [ "${line_path:0:1}" != "/" ]; then 

     continue

   fi

   if [ "${line_path}" = "/" ]; then

      root_avail=${line_avail}

     #echo "root_avail:${root_avail}"

     if [ -f /tmp/tmp_root_avail ];then 

       rm /tmp/tmp_root_avail

     fi

     echo ${root_avail} > /tmp/tmp_root_avail

     continue

   fi

  path_length=${#line_path}

  if [ "${path:0:${path_length}}" = "${line_path}" ];then

   # echo "${path} contain path:${line_path}" 

    path_avail=${line_avail}

    if [ -f /tmp/tmp_path_avail ];then

      rm /tmp/tmp_path_avail

    fi

    echo ${path_avail} > /tmp/tmp_path_avail

    break

  fi

done

#############get data from temp file###############

if [ -f /tmp/tmp_path_avail ];then

 path_avail=`cat /tmp/tmp_path_avail`

 rm /tmp/tmp_path_avail

fi

if [ -f /tmp/tmp_root_avail ];then

 root_avail=`cat /tmp/tmp_root_avail`

 rm /tmp/tmp_root_avail

fi

###################compute######################

if [ -z ${path_avail} ];then

#   echo "root_avail:${root_avail}"

#   echo "path_avail=${path_avail}"

   path_avail=${root_avail}

fi

 

echo "${path_avail}"

 

保存为get_dir_avail_path.sh

chmod 777 get_dir_avail_path.sh修改权限

#usage:

#  ./get_dir_avail_space [dir]

#e.g:

#   ./get_dir_avail_space /root

#   ./get_dir_avail_space