脚步--user--mem

获取内存信息的脚步：

#!/bin/bash

#

USAGEINFO() {

  # $1 is the free space

  local ISPERCENT=$[$1*100/$2]

  if [ $ISPERCENT -lt 10 ]; then 

    echo -e "\033[31;1mWarning:\033[0m the free space is too less ."

  else

    echo -e "\033[32;1mThe free space is ${ISPERCENT}%.\033[0m"

  fi

}

MEMINFO() {

  TOTAL=`awk '/^'"${1}Total"'/{print $2}' /proc/meminfo` 

  FREE=`awk '/^'"${1}Free"'/{print $2}' /proc/meminfo` 

  local USED=$[$TOTAL-$FREE]

  echo "-------------------------------------------"

  echo -e " \033[1m${1}Total      ${1}Free      ${1}Used\033[0m"

  echo "-------------------------------------------"

  echo " ${TOTAL}kb       ${FREE}kb     ${USED}kb"

  echo "-------------------------------------------"

  USAGEINFO $FREE $TOTAL

}

cat << EOF

1) Display the Memory information.

2) Display the Swap information.

EOF

read -p "Your choice: " SWITCH

case $SWITCH in

'1')

   MEMINFO Mem

  ;;

'2')

  MEMINFO Swap

  ;;

*)

  echo "Wrong choice, the correct options is '1' and '2'."

  exit 1

  ;;

esac

增加用户的脚步：

#!/bin/bash

# This about useradd user and delete user

for I in {1..20};do

  useradd linux$I 

  echo "linux$I" | passwd --stdin linux$I

done

tail -20 /etc/passwd | awk -F: '{ print "ROOT" $1 ",UID" $3 ",GID" $4}'

   

#for I in {1..20};do 

#  userdel -r linux$I 

#done

#tail -5 /etc/passwd

登陆小脚步：

#!/bin/bash

#

#read user

w | cut -d: -f1 | grep 'nnnnnnn'

A=$?

  if [ $A -eq 0 ];then

      echo "redhat is logged on."

     else

       echo "the pc mast sleep"

        sleep 5

   fi