p10-function.sh

几个简单实用的shell程序。它能使你更充分的了解linux下shell编程。

lineNumber(){
return `who|wc -l`	
}
n=lineNumber
echo There are $n users.

lastdate() {
    DateString=$1
    Year=`echo $DateString | cut -b 1-4`
    Month=`echo $DateString | cut -b 5-6`

    if [ $Month -eq 1 ]; then
        Month=12
        Year=`expr $Year - 1`
    else
        Month=`expr $Month - 1`
    fi

    Cal=`cal $Month $Year`
    Yesterday=`echo $Cal | awk '{print $NF}'`
    echo "$Year/$Month/$Yesterday"
}
lastdate 200303