从字符串内删除多余的空格(Remove excess whitespace from within a string)

 您可以使用从命令行传入的变量：第一个$2 ，第二$2为$2等。看起来这里有两个变量， file.csv和DataAudit.txt 
 
 如果用$1替换file.csv ，用$2替换file.csv ，现在可以通过执行以下操作来执行脚本： 
 
./audit.sh myotherfile.csv MyOtherAudit.txt
 
 
 或者为了提高可读性，通常将它们分配到脚本顶部的命名变量中： 
 
INPUTFILE=$1
OUTPUTFILE=$2
 
 然后，在您的代码中，您可以使用$INPUTFILE和$OUTPUTFILE引用它们 

You can use variables that are passed in from the command line: $1 for the first, $2 for the second, etc. It looks like you have two variables here, the file.csv and DataAudit.txt
 
If you replace file.csv with $1 and DataAudit.txt with $2, you can now execute your script by doing:
 
./audit.sh myotherfile.csv MyOtherAudit.txt
 
 
Alternatively for more readability, it is common to assign these into named variables at the top of your script:
 
INPUTFILE=$1
OUTPUTFILE=$2
 
Then, in your code you can reference these with $INPUTFILE and $OUTPUTFILE