shell

#!/bin/bash
if test $# -ne 1
    then
        echo "Usage: $0: you have to contain an argument"
        exit 1
fi
if test -f "$1"
    then
        FileName="$1"
        rm $FileName
fi
if test -d "$1"
    then
        DirectoryName="$1"
        rm -rf $DirectoryName
fi
exit 0

#!/bin/bash
if test $# -ne 1 #if the argument number is not 1
   then
    echo "Usage: $0 ordinary_file" # output usage
    exit 1
fi
if test -f "$1"
   then
    FileName="$1" #file name
    set $(ls -il $FileName) #set the output of the cmd as environment variable
    #set `ls -il $FileName`
    FileOwner="$4" #file owner
    date1="$7" # year, moth, day
    date2="$8" #time
    echo "The owner of $FileName is: $FileOwner"
    echo "The last modified date is: $date1 $date2"
    exit 0
fi
echo "$0: argument must be an ordinary file" #output usage if the argument is not an ordinary file
exit 1

shell 读文件！！！

很好的博文！！！

首次用shell，真心不习惯！

#!/bin/bash

echo "Welcome to Homework Management System"

echo "Enter Your Choice"

echo "1-administrator    2-teacher    3-student"

read choice #user's choice

if [ $choice -eq "1" ]

then

echo "enter username:"

read username #read username 

echo "enter password:"

read password #read password

flag=0

more admin | while read uname passwd

do

if [ $uname = $username -a $passwd = $password ]

then

flag=1 #if sucessfully login, set flag to be 1

break

fi

done #end while

if [ $flag = 1 ]

then

echo "username or password error"

exit 1

else

echo "succeed"

#

fi

fi