Linux 从两个不同的文本文件中读取并获取每一行';s柱
我想从两个不同的文本文件(行号相等)中读取数据,并将每行的第5列相互比较。但这对我不起作用。有人帮我吗?这是我的代码:Linux 从两个不同的文本文件中读取并获取每一行';s柱,linux,shell,unix,sh,Linux,Shell,Unix,Sh,我想从两个不同的文本文件(行号相等)中读取数据,并将每行的第5列相互比较。但这对我不起作用。有人帮我吗?这是我的代码: df -h --total>current_filesystem_usage.txt if [ -s previous_months_filesystem_usage.txt ] then #reading from two different files and store each line into a variable while read curr
df -h --total>current_filesystem_usage.txt
if [ -s previous_months_filesystem_usage.txt ]
then
#reading from two different files and store each line into a variable
while read current_file_line <&3 && read previous_file_line <&4
do
current_filesystem_name=$(cat $current_file_line | awk {'print $1'})
current_filesystem_usage=$(cat $current_file_line | awk {'print $5'})
previous_filesystem_name=$(cat $previous_file_line | awk {'print $1'})
previous_filesystem_usage=$(cat $previous_file_line | awk {'print $5'})
if [ ${current_filesystem_usage%?} -ge ${previous_filesystem_usage%?} ]
then echo "There is problem !!! "
echo "Current disk usage:${current_filesystem_name}, ${current_filesystem_usage}"
echo "Previous month's disk usage:${previous_filesystem_name}, ${previous_filesystem_usage}"
#I also want to store all echo output to output.txt file
elif [ ${current_filesystem_usage%?} -lt ${previous_filesystem_usage%?} ]
then echo "There is no problem. Everything is alright."
echo "Current disk usage: ${current_filesystem_name}, ${current_filesystem_usage}"
echo "Previous month's disk usage: ${previous_filesystem_name}, ${previous_filesystem_usage}"
fi
done 3<current_filesystem_usage.txt 4<previous_months_filesystem_usage.txt
fi
df-h--total>current\u filesystem\u usage.txt
如果[-s以前的\u个月\u文件系统\u usage.txt]
然后
#读取两个不同的文件,并将每行存储到一个变量中
在awk中读取当前\u文件\u行时:
$ awk '
NR==FNR { # process the first file
a[FNR]=$5 # hash field $5 to a, use row number as key
next } # move to next record
$5 > a[FNR] { # process the second file, if current is greater than previous
print "error" # output error
}
' file1 file2
它基本上将file1散列到a
,并使用行号作为键。您在帖子中没有提到比较结果是什么,因此无法帮助更多的ATM。您能解释一下吗?例如,a是什么?为什么以$0开头?比较的结果,如果当前值大于以前的回显错误,如果不是,则一切正常。a
是一个哈希,在处理file1
时,5
存储在其中,行号作为键。非常感谢您的努力。我真的很感激。我会试试。如果有更好的要求,我可能会提供更多帮助。如果您想比较和计算差异,可以使用not-m
而不是-h
。它将以兆字节的形式输出结果作为整数值,而不是人类可读但解析不好的形式。不是兆字节,兄弟。