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    Thursday, March 5, 2015

    Sailing Through The World of Linux BASH Scripting – Part III

    March 05, 2015
    Sailing Through The World of Linux BASH Scripting – Part III




    Hello Everyone,

    In this tutorial,

    Let Us Create a Sailing Through The World of Linux BASH Scripting – Part III

    You Can also Configure in Redhat Linux, Ubuntu, Fedora, CentOS, LinuxMint, Oracle Linux, Cloud Linux.

    Move Current Working Directory
    Create a Random File or Folder
    Script to Converts UPPERCASE to lowercase
    Simple Calculator Program

     Move Current Working Directory

    #! /bin/bash

    LEVEL=$1

    for ((i = 1; i <= LEVEL; i++))

    do

    CDIR=../$CDIR done cd $CDIR

    echo "You are in: "$PWD

    exec /bin/bash

    Create a Random File or Folder

    #! /bin/bash

    echo "Hello $USER";

    echo "$(uptime)" >> "$(date)".txt

    echo "Your File is being saved to $(pwd)“

    echo‘ : Prints everything written within the quotes.

    ‘$‘ : Is a shell variable.

    ‘>>‘ : The output is redirected to the output of date command followed by txt extension

     Script to Converts UPPERCASE to lowercase

    touch small.txt

    #!/bin/bash

    echo -n "Enter File Name : "

    read fileName

    if [ ! -f $fileName ]; then

    echo "Filename $fileName does not exists"

    exit 1

     fi

    tr '[A-Z]' '[a-z]' < $fileName >> small.txt

    Simple Calculator Program



    #! /bin/bash

    clear

    sum=0

    i="y"

    echo " Enter one no."

    read n1

    echo "Enter second no."

    read n2

    while [ $i = "y" ]

    do

    echo "1.Addition"

    echo "2.Subtraction"

    echo "3.Multiplication"

    echo "4.Division"

    echo "Enter your choice"

    read ch

    case $ch in



    1)sum=`expr $n1 + $n2`

         echo "Sum ="$sum;;

            2)sum=`expr $n1 - $n2`

         echo "Sub = "$sum;;

        3)sum=`expr $n1 \* $n2`

         echo "Mul = "$sum;;

        4)sum=`expr $n1 / $n2`

         echo "Div = "$sum;;

        *)echo "Invalid choice";;

    esac

    echo "Do u want to continue (y/n)) ?"

    read i

    if [ $i != "y" ]

    then

        exit

    fi

    done


    NOTE :- For Any Clarification Please Below
     
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    ####--------------------------------------------------------------------------------------####
    Website    :-   http://www.cloudnetwork.in
    Twitter     :-   http://twitter.com/itcloudnet
    Skype Id  :-   cloud.network1
    E-Mail Id :-   itcloudnet@gmail.com
    ####----------------------------------------------------------------------------------------####                         
    Thanking You
    Hope U Like it........
     
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    Mathematical Aspect of Linux Shell Programming – Part IV

    March 05, 2015
    Mathematical Aspect of Linux Shell Programming – Part IV


    Hello Everyone,

    In this tutorial,

    Let Us Create a Mathematical Aspect of Linux Shell Programming – Part IV

    You Can also Configure in Redhat Linux, Ubuntu, Fedora, CentOS, LinuxMint, Oracle Linux, Cloud Linux.

    Script 1: Additions
    Script 2: Substraction
    Script 3: Multiplication
    Script 5: Table
    Script 4: Division
    Script 5: Table
    Script 6: EvenOdd
    Script 7: Factorial


    Script 1: Additions

    Step1 :-  touch Addition.sh                    --       (Create a file)

    Step2 :-  vi Addition.sh                          --      (Editing a file & Save, Quit)

                          #!/bin/bash

                          echo “Enter the First Number: ”

                          read a

                          echo “Enter the Second Number: ”

                          read b

                          x=$(expr "$a" + "$b")

                          echo $a + $b = $x

    Step3 :-  chmod 755 Addition.sh           --       (Permission giving)

    Step4 :-  ./Addition.sh                            --       (Finally Run Script)

    Script 2: Subtraction

    Step1 :-  touch Substraction.sh                    --       (Create a file)

    Step2 :-  vi  Substraction.sh                         --      (Editing a file & Save, Quit)

                          #!/bin/bash

    echo “Enter the First Number: ”

    read a

    echo “Enter the Second Number: ”

    read b

    x=$(($a - $b))

    echo $a - $b = $x

    Step3 :-  chmod 755 Substraction.sh            --       (Permission giving)

    Step4 :-  ./ Substraction.sh                            --       (Finally Run Script)

    Script 3: Multiplication

    Step1 :-  touch Multiplication.sh                    --       (Create a file)

    Step2 :-  vi Multiplication.sh                          --      (Editing a file & Save, Quit)

     #!/bin/bash

    echo “Enter the First Number: ”

    read a

    echo “Enter the Second Number: ”

    read b

    echo "$a * $b = $(expr $a \* $b)"

    Step3 :-  chmod 755 Multiplication.sh           --       (Permission giving)

    Step4 :-  ./ Multiplication.sh                           --       (Finally Run Script)


    Script 4: Division

    Step1 :-  touch Division.sh                    --       (Create a file)

    Step2 :-  vi Division.sh                         --      (Editing a file & Save, Quit)

                          #!/bin/bash

                          echo “Enter the First Number: ”

                          read a

                          echo “Enter the Second Number: ”

                          read b

                          echo “$a / $b = $(expr  $a  /  $b)”

    Step3 :-  chmod 755 Division.sh         --       (Permission giving)

    Step4 :-  ./Division.sh                            --       (Finally Run Script)

    Script 5: Table

    Step1 :-  touch Table.sh                    --       (Create a file)

    Step2 :-  vi Table.sh                          --      (Editing a file & Save, Quit)

                          #!/bin/bash

    echo “Enter The Number upto which you want to Print Table: ”

    read n

    i=1

    while [ $i -ne 10 ]

    do

    i=$(expr $i + 1)

    table=$(expr $i \* $n)

    echo $table

    done

    Step3 :-  chmod 755 Table.sh           --       (Permission giving)

    Step4 :-  ./Table.sh                            --       (Finally Run Script)

     

       Script 6: EvenOdd

    Step1 :-  touch EvenOdd.sh                    --       (Create a file)

    Step2 :-  vi EvenOdd.sh                          --      (Editing a file & Save, Quit)

                      #!/bin/bash

    echo "Enter The Number"

    read n

    num=$(expr $n % 2)

    if [ $num -eq 0 ]

    then

    echo "is a Even Number"

    else

    echo "is a Odd Number"

    fi

    Step3 :-  chmod 755 EvenOdd.sh          --       (Permission giving)

    Step4 :-  ./EvenOdd.sh                           --       (Finally Run Script)

    Script 7: Factorial

    Step1 :-  touch Factorial.sh                    --       (Create a file)

    Step2 :-  vi Factorial.sh                          --       (Editing a file & Save, Quit)

                        #!/bin/bash

    echo "Enter The Number"

    read a

    fact=1

    while [ $a -ne 0 ]

    do

    fact=$(expr $fact \* $a)

    a=$(expr $a - 1)

    done

    echo $fact

    Step3 :-  chmod 755 Factorial.sh           --       (Permission giving)

    Step4 :-  ./Factorial.sh                            --       (Finally Run Script)

    NOTE :- For Any Clarification Please Below
     
    Comment,
    Like and
    Share  us  and  help us to spread.

    ####--------------------------------------------------------------------------------------####
    Website    :-   http://www.cloudnetwork.in
    Twitter     :-   http://twitter.com/itcloudnet
    Skype Id  :-   cloud.network1
    E-Mail Id :-   itcloudnet@gmail.com
    ####----------------------------------------------------------------------------------------####                         
    Thanking You
    Hope U Like it........


    Comment Policy We’re eager to see your comment. However, Please Keep in mind that all comments are moderated manually by our human reviewers according to our comment policy, and all the links are nofollow. Using Keywords in the name field area is forbidden. Let’s enjoy a personal and evocative conversation.
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    Shell Scripts for Linux Newbies to Learn Shell Programming – Part II

    March 05, 2015
    Shell Scripts for Linux Newbies to Learn Shell Programming – Part II


    Hello Everyone,

    In this tutorial,

    Let Us Shell Scripts for Linux to Learn Shell Programming – Part II

    You Can also Configure in Redhat Linux, Ubuntu, Fedora, CentOS, LinuxMint, Oracle Linux, Cloud Linux.

    Script 1: Drawing a Special Pattern
    #!/bin/bash
    MAX_NO=0
    echo -n "Enter Number between (5 to 9) : "
    read MAX_NO
    if ! [ $MAX_NO -ge 5 -a $MAX_NO -le 9 ] ; then
                   echo "WTF... I ask to enter number between 5 and 9, Try Again“
                   exit 1
    fi
    clear
    for (( i=1; i<=MAX_NO; i++ )) do         for (( s=MAX_NO; s>=i; s-- ))
              do
                 echo -n " "
              done
              for (( j=1; j<=i; j++ )) do echo -n " ." done echo "" done ###### Second stage ###################### for (( i=MAX_NO; i>=1; i-- ))
    do
             for (( s=i; s<=MAX_NO; s++ ))
             do
                   echo -n " "
             done
             for (( j=1; j<=i; j++ ))
             do
                echo -n " ."
             done
             echo ""
    done
    echo -e "\n\n\t\t\t Whenever you need help, cloudnetwork.in is always there"



    Script 2: Creating Colorful Script

    #!/bin/bash

    clear

    echo -e "33[1m Hello World"

    # bold effect

    echo -e "33[5m Blink"

    # blink effect

    echo -e "33[0m Hello World"

    # back to normal

    echo -e "33[31m Hello World“

     # Red color

    echo -e "33[32m Hello World"

    # Green color

    echo -e "33[33m Hello World"

    # See remaining on screen

    echo -e "33[34m Hello World"

    echo -e "33[35m Hello World"

    echo -e "33[36m Hello World"

    echo -e -n "33[0m"

    # back to normal

    echo -e "33[41m Hello World"

    echo -e "33[42m Hello World"

    echo -e "33[43m Hello World"

    echo -e "33[44m Hello World"

    echo -e "33[45m Hello World"

    echo -e "33[46m Hello World"

    echo -e "33[0m Hello World"


    Script 3: Encrypt a File/Directory

    yum install pinentry-gui

    apt-get install pinentry-gui

    Touch Encrypt.sh

    Vi Encrypt.sh

    #!/bin/bash

    echo "Welcome, I am ready to encrypt a file/folder for you"

    echo "currently I have a limitation, Place me to thh same folder, where a file to be encrypted is present“

    echo "Enter the Exact File Name with extension"

    read file;

    gpg -c $file

    echo "I have encrypted the file successfully..."

    echo "Now I will be removing the original file"

    rm -rf $file

     Script 4: Checking Server Utilization

    #!/bin/bash

        date;

        echo "uptime:"

        uptime

        echo "Currently connected:"

        w

        echo "--------------------"

        echo "Last logins:"

        last -a |head -3

        echo "--------------------"

        echo "Disk and memory usage:"

        df -h | xargs | awk '{print "Free/total disk: " $11 " / " $9}'

        free -m | xargs | awk '{print "Free/total memory: " $17 " / " $8 " MB"}'

        echo "--------------------"

        start_log=`head -1 /var/log/messages |cut -c 1-12`

        oom=`grep -ci kill /var/log/messages`

        echo -n "OOM errors since $start_log :" $oom

        echo ""

        echo "--------------------"

    echo "Utilization and most expensive processes:"

        top -b |head -3

        echo

      top -b |head -10 |tail -4

        echo "--------------------"

        echo "Open TCP ports:"

        nmap -p- -T4 127.0.0.1

        echo "--------------------"

        echo "Current connections:"

        ss -s

        echo "--------------------"

        echo "processes:"

        ps auxf --width=200

        echo "--------------------"

        echo "vmstat:"

        vmstat 1 5

      
    1.   ‘>‘ : the redirection operator causes a file creation, and if it does exist, the contents are overwritten.

    2.   ‘>>‘ : when you use >>, you are adding information, rather than replacing it.

    3.   ‘>>‘ is safe, as compared to ‘>‘

    Script 5: Check Disk Space and Sends an Email Alert

    MAX=95

    EMAIL=USER@domain.com

    PART=sda1

    USE=`df -h |grep $PART | awk '{ print $5 }' | cut -d'%' -f1`

     if [ $USE -gt $MAX ]; then

    echo "Percent used: $USE" | mail -s "Running out of disk space" $EMAIL

    fi

     
    Comment,
    Like and
    Share  us  and  help us to spread.

    ####--------------------------------------------------------------------------------------####
    Website    :-   http://www.cloudnetwork.in
    Twitter     :-   http://twitter.com/itcloudnet
    Skype Id  :-   cloud.network1
    E-Mail Id :-   itcloudnet@gmail.com
    ####----------------------------------------------------------------------------------------####                         
    Thanking You
    Hope U Like it........


    Comment Policy We’re eager to see your comment. However, Please Keep in mind that all comments are moderated manually by our human reviewers according to our comment policy, and all the links are nofollow. Using Keywords in the name field area is forbidden. Let’s enjoy a personal and evocative conversation.
    By at
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