echo .Enter the First Number: .

read a

echo .Enter the Second Number: .

read b

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

echo $a + $b = $x

echo "Enter A Number"

read n

arm=0

temp=$n

while [ $n -ne 0 ]

do

r=$(expr $n % 10)

arm=$(expr $arm + $r \* $r \* $r)

n=$(expr $n / 10)

done

echo $arm

if [ $arm -eq $temp ]

then

echo "Armstrong"

else

echo "Not Armstrong"

fi

echo "Enter a number :"

read Binary

if [ $Binary -eq 0 ]

then

echo "Enter a valid number "

else

while [ $Binary -ne 0 ]

do

Bnumber=$Binary

Decimal=0

power=1

while [ $Binary -ne 0 ]

do

rem=$(expr $Binary % 10 )

Decimal=$((Decimal+(rem*power)))

power=$((power*2))

Binary=$(expr $Binary / 10)

done

echo " $Decimal"

done

fi

MAX=95

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

clear

echo -e "\033[1m Hello World"

# bold effect

echo -e "\033[5m Blink"

# blink effect

echo -e "\033[0m Hello World"

# back to noraml

echo -e "\033[31m Hello World"

# Red color

echo -e "\033[32m Hello World"

# Green color

echo -e "\033[33m Hello World"

# See remaing on screen

echo -e "\033[34m Hello World"

echo -e "\033[35m Hello World"

echo -e "\033[36m Hello World"

echo -e -n "\033[0m"

# back to noraml

echo -e "\033[41m Hello World"

echo -e "\033[42m Hello World"

echo -e "\033[43m Hello World"

echo -e "\033[44m Hello World"

echo -e "\033[45m Hello World"

echo -e "\033[46m Hello World"

echo -e "\033[0m Hello World"

for ((i=32;i>=0;i--)); do

r=$(( 2**$i))

Probablity+=( $r )

done

[[ $# -eq 0 ]] && { echo -e "Usage \n \t $0 numbers"; exit 1; }

echo -en "Decimal\t\tBinary\n"

for input_int in $@; do

s=0

test ${#input_int} -gt 11 && { echo "Support Upto 10 Digit number :: skiping \"$input_int\""; continue; }

printf "%-10s\t" "$input_int"

for n in ${Probablity[@]}; do

if [[ $input_int -lt ${n} ]]; then

[[ $s = 1 ]] && printf "%d" 0

else

printf "%d" 1 ; s=1

input_int=$(( $input_int - ${n} ))

fi

done

echo -e

echo .Enter the First Number: .

read a

echo .Enter the Second Number: .

read b

echo "$a / $b = $(expr $a / $b)"

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

echo "currently I have a limitation, Place me to teh 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 sucessfully..."

echo "Now I will be removing the original file"

rm -rf $file

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"

echo "Enter The Number"

read a

fact=1

while [ $a -ne 0 ]

do

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

a=$(expr $a - 1)

done

echo $fact

echo "How many numbers do you want of Fibonacci series ?"

read total

x=0

y=1

i=2

echo "Fibonacci Series up to $total terms :: "

echo "$x"

echo "$y"

while [ $i -lt $total ]

do

i=`expr $i + 1 `

z=`expr $x + $y `

echo "$z"

x=$y

y=$z

done

echo "Hello World!"

echo "Hey what's Your First Name?";

read a;

echo "welcome Mr./Mrs. $a, would you like to tell us, Your Last Name";

read b;

echo "Thanks Mr./Mrs. $a $b for telling us your name";

echo "*******************"

echo "Mr./Mrs. $b, it's time to say you good bye"

echo .Enter the First Number: .

read a

echo .Enter the Second Number: .

read b

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

echo “Enter Any Number”

read n

i=1

c=1

while [ $i -le $n ]

i=$(expr $i + 1)

r=$(expr $n % $i)

if [ $r -eq 0 ]

then

c=$(expr $c + 1)

fi

if [ $c -eq 2 ]

echo “Prime”

echo “Not Prime”

echo "Hello $USER"

echo "Hey i am" $USER "and will be telling you about the current processes"

echo "Running processes List"

ps

A collection of Bash scripts from [TecMint.com's tutorial](http://www.tecmint.com/learning-shell-scripting-language-a-guide-from-newbies-to-system-administrator/).

1. Hello.sh: get a simple output

1. Process.sh: execute more than one command in a script

1. Interactive.sh: a simple but very much interactive script

1. Special_patter.sh: draw a diamond pattern with dots(.)

1. Colourfull.sh: provide you with the output of several colours

1. Encrypt.sh: encrypt a file/folder with password

1. Server-Health.sh: report server related information

1. Disk_space.sh: check if the disk space crosses the limit

1. up.sh: move up a directory in shell script

1. Randomfile.sh: create unique file/folder automatically with date and time stamp

1. Collectnetworkinfo.sh: gather information related to server

1. Convertlowercase.sh: convert data either from the file or standard input to lowercase

1. Simplecacl.sh: a simple calculator

1. Addition.sh: perform addition of two numbers

1. Substraction.sh: perform substraction of two numbers

1. Multiplication.sh: perform multiplication of two numbers

1. Division.sh: perform division of two numbers

1. Table.sh: print table of any number

1. EvenOdd.sh: checks if a number input from standard input is odd or even

1. Factorial.sh: generate the factorial of a number

1. Armstrong.sh: check if a provided number is Armstrong or not

1. Prime.sh: check if a number is prime or not

1. Fibonacci.sh: test if a number being entered is a Fibonacci or not

1. Decimal2Binary.sh: convert Decimal Number to Binary

1. Binry2Decimal.sh: convert Binary Number back to decimal

#!/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

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

clear

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

for (( s=MAX_NO; s>=i; s-- ))

do

echo -n " "

done

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

do

echo -n " ."

done

echo ""

for (( i=MAX_NO; i>=1; i-- ))

for (( s=i; s<=MAX_NO; s++ ))

do

echo -n " "

done

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

do

echo -n " ."

done

echo ""

echo -e "\n\n\t\t\t Whenever you need help, Tecmint.com is always there"

echo .Enter the First Number: .

read a

echo .Enter the Second Number: .

read b

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

echo $a - $b = $x

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