A small shell to manage something.

unix_homework_2.sh

#! /bin/bash

max_space_user(){
  du -s /home | sort -nr | head -1
}

max_file(){
  find -type f -exec stat -c "%s %n" {} \; | sort -nr | head -1
}

find_cpp(){
  for file in `ls $1 | egrep -e '\.(cpp|h)$'`
  do
    stat -c "%s %n" $file
  done
}

find_user(){
  expr `w $1 | grep -c ""` - 2
}

some_service(){
  if test $1 -eq "start"
  then
    service vsftpd start
    service httpd start
  elif test $1 -eq "status"
  then
    service vsftpd status
    service httpd status
  elif test $1 -eq "stop"
  then
    service vsftpd stop
    service httpd stop
  else
    echo "illegal parameter $1"
  fi
}

temp=0
while test $temp -ne -1
do
  echo "1. Find max space user"
  echo "2. Find the max file"
  echo "3. Find .cpp and .h"
  echo "4. Get the number of the user's terminal"
  echo "5. Get the status or stop or start Ftp or Http service"
  echo "-1. Quit"
  read temp
  temp=`expr $temp + 0`
  if test $temp -eq 1
  then
    max_space_user
  elif test $temp -eq 2
  then
    max_file
  elif test $temp -eq 3
  then
    echo "Please enter the path"
    read temp_path
    find_cpp $temp_path
  elif test $temp -eq 4
  then
    echo "Please enter the username"
    read temp_username
    find_user $temp_username
  elif test $temp -eq 5
  then
    echo "Please enter the command (status|stop|start)."
    read temp_command
    some_service $temp_command
  elif test $temp -eq -1
  then
    echo "Bye~"
  else
    echo "unknown command number"
  fi
done