Extra Files addedgit status!

Author: NishkarshRaj

Extra Scripts/DevOps-Sem3- Lab Scripts.rar

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+ #!/bin/bash
+
+# Initializing variables with a value
+number1=5; number2=5
+
+# Expression "[ $number1 -eq $number2 ]" that resolves to a Boolean value.
+if [ $number1 -eq $number2 ]; then
+    # Code to run if condition is true
+    echo "$number1 is equal to $number2"
+else
+    # Code to run if condition is false
+    echo "$number1 is not equal to $number2"
+fi

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/basicif.sh

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+#!/bin/bash
+
+# Loop through the items delimited by whitespace in the "names" variable.
+names="Name1 Name2 Name3"
+
+for name in $names; do
+    echo "Hello $name"
+done
+
+# Loop through the items in the substituted sequence command.
+for number in `seq 1 10`; do
+    echo "I am $number"
+done

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/forloop.sh

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+#!/bin/bash
+
+# Defining the function "greet" that accepts a parameter
+function greet {
+    echo "Hello $1!"
+}
+
+# Calling the function "greet" with parameter "World"
+greet "World"
+
+# Calling the function "greet" with parameter "User"
+greet "User"

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/function.sh

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+#!/bin/bash
+
+# Creating a readonly variable called "greeting"
+readonly greeting="Hello"
+
+# Creating an ordinary variable called "current_time"
+current_time=`date +%X`
+
+# Substitute the output of the command "whoami".
+echo "Hi, I am $(whoami)." 
+
+# Prompt the user to provide their name
+read -e -p "Who are you? " myName
+
+# Substituting the variables and printing them
+echo "${greeting:-Hi}, $myName. Now the time is $current_time"

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/hello.sh

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+#!/bin/bash
+
+# Reading the text from stdin and assigning it to the variable named "myName"
+read myName
+
+# Substitute the variable and print the text
+echo "Hello ${myName}"

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/input.sh

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+#!/bin/bash
+
+# Initializing variables with a value
+number1=5; number2=5
+
+# Evaluating the expression
+if [ $number1 -gt $number2 ]; then
+    echo "$number1 is greater than $number2"
+elif [ $number1 -lt $number2 ]; then
+    echo "$number1 is lesser than $number2"
+else
+    echo "$number1 is equal to $number2"
+fi

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/ladderif.sh

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+#!/bin/bash
+
+# Initializing variables with a value
+number1=5; number2=5
+
+# Evaluating the expression
+if [ $number1 -ne $number2 ]; then
+    if [ $number1 -gt $number2 ]; then
+        echo "$number1 is greater than $number2"
+    else
+        echo "$number1 is lesser than $number2"
+    fi
+else
+    echo "$number1 is equal to $number2"
+fi

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/nestedif.sh

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+#!/bin/bash
+
+# Send the text to the stdout
+echo "any standard text can be here"
+
+# Send the text to the stderr
+echo "any error text can be here" >&2

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/output.sh

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+#!/bin/bash
+
+name="john"
+
+# A string is given as input to case statement.
+case "$name" in
+
+    # Checks for the switch that matches and executes that action.
+    john) echo "Welcome Admin" ;;
+    alexa) echo "Welcome User" ;;
+
+    # If none is matched, "*" switch gets executed.
+    *) echo "Access Denied" ;;
+esac

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/switchcase.sh

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+#!/bin/bash
+
+# Assigning the text "User!" to the variable
+myName="User!"
+
+# Substituting it by enclosing the variable name in ${}
+echo "Hello ${myName}"

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/variable.sh

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+ #!/bin/bash
+
+count="9"
+
+# Evaluates whether "count" is greater than zero and if true, enters loop.
+while [ $count -gt 0 ]; do
+
+    # Print the "count"
+    echo "$count"
+
+    # Decrease the value of count
+    count=$[$count-1]
+done

Extra Scripts/DevOps-Sem3- Lab Scripts/2.1 Introduction to Bash and Shell scripting/whileloop.sh

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+#!/bin/bash
+
+read -e -p "Log Directory: " log_directory
+
+read -e -p "File Extension: " extension
+
+read -e -p "Backup Directory: " backup_directory
+
+tar czf archive.tar.gz $(find $log_directory -name "*.$extension")
+
+mv archive.tar.gz $backup_directory/$(date +%F).tar.gz
+
+rm $(find $log_directory -name "*.$extension")
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A1.sh

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+#!/bin/bash
+
+removelog="/var/log/remove.log"
+
+if [ $# -eq 0 ] ; then
+  echo "Usage: $0 [-s] list of files or directories"; exit 0;
+fi
+
+if [ "$1" = "-s" ] ; then
+  shift
+else
+  echo "$(date): ${USER}: $@" >> $removelog
+fi
+
+/bin/rm "$@"
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A10.sh

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+#!/bin/bash
+
+downloads_directory="$HOME/Downloads"
+
+if [ -z "$1" ]; then
+    echo "ERROR: Download List file is not specified in the arguments" >&2; exit 1;
+fi
+
+if ! [ -z "$2" ]; then
+    downloads_directory=$2
+fi
+
+if [ ! -d $downloads_directory ] ; then
+    mkdir -p $downloads_directory
+fi
+
+
+download_list=$1
+
+cat $download_list | while read url; do
+    echo "----------------------------------------------------------------------------------------------------"
+    echo "$url"
+    wget -P $downloads_directory $url
+done
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A11.sh

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+#!/bin/bash
+
+echo -e "\n\nUpdating Apt Packages and upgrading latest patches\n"
+sudo apt-get update -y && sudo apt-get upgrade -y
+
+echo -e "\n\nInstalling Apache2 Web server\n"
+sudo apt-get install apache2 apache2-doc apache2-mpm-prefork apache2-utils libexpat1 ssl-cert -y
+
+echo -e "\n\nInstalling PHP & Requirements\n"
+sudo apt-get install libapache2-mod-php7.0 php7.0 php7.0-common php7.0-curl php7.0-dev php7.0-gd php-pear php7.0-mcrypt php7.0-mysql -y
+
+echo -e "\n\nInstalling MySQL\n"
+sudo apt-get install mysql-server mysql-client -y
+
+echo -e "\n\nPermissions for /var/www\n"
+sudo chown -R www-data:www-data /var/www
+echo -e "\n\n Permissions have been set\n"
+
+echo -e "\n\nEnabling Modules\n"
+sudo a2enmod rewrite
+sudo phpenmod mcrypt
+
+echo -e "\n\nRestarting Apache\n"
+sudo service apache2 restart
+
+echo -e "\n\nLAMP Installation Completed"
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A12.sh

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+#!/bin/bash
+
+if [ -z "$1" ]; then
+    echo "ERROR: No argument supplied" >&2; exit 1;
+fi
+
+archives_directory=$(realpath $1)
+if [ ! -d "$archives_directory" ]; then
+    echo "ERROR: Archives directory does not exist" >&2; exit 1;
+fi
+
+find $archives_directory -type f -name '*.tar.gz' -mmin +$((60 * 24 * 2)) -exec rm {} \;
+
+path_to_script=$(realpath "$0")
+if ! (crontab -l | grep -Fxq "0 0 * * * $path_to_script $archives_directory"); then
+    crontab -l | { cat; echo "0 0 * * * $path_to_script $archives_directory"; } | crontab -
+    echo "Script added to Cron"
+fi
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A2.sh

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+#!/bin/bash
+
+if [ -z "$1" ]; then
+    echo "ERROR: Credentials file not specified" >&2; exit 1;
+elif [ -z "$2" ]; then
+    echo "ERROR: Backup directory not specified" >&2; exit 1;
+fi
+
+credentials_file=$(realpath $1)
+backup_directory=$(realpath $2)
+if [ ! -f "$credentials_file" ]; then
+    echo "ERROR: Credentials file does not exist" >&2; exit 1;
+elif [ ! -d "$backup_directory" ]; then
+    echo "ERROR: Backup directory does not exist" >&2; exit 1;
+fi
+
+source $credentials_file
+
+if [ -z ${hostname:+word} ]; then
+    echo "ERROR: hostname is not set" >&2; exit 1;
+elif [ -z ${username:+word} ]; then
+    echo "ERROR: username is not set" >&2; exit 1;
+elif [ -z ${password:+word} ]; then
+    echo "ERROR: password is not set" >&2; exit 1;
+fi
+
+mysqldump -h$hostname -u$username -p$password --all-databases > backup.sql
+if [[ $? != 0 ]]; then
+    echo "ERROR: Error in taking mysql backup" >&2; exit 1;
+fi
+
+mv backup.sql $backup_directory/$(date +%F_%R).sql
+
+path_to_script=$(realpath "$0")
+if ! (crontab -l | grep -Fxq "0 */12 * * * $path_to_script $credentials_file $backup_directory"); then
+    crontab -l | { cat; echo "0 */12 * * * $path_to_script $credentials_file $backup_directory"; } | crontab -
+    echo "Script added to Cron"
+fi
+
+exit 0
+
+#
+# Credentials File
+#
+# hostname=localhost
+# username=root
+# password=password
+#

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A3.sh

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+#!/bin/bash
+
+if [ -z "$1" ]; then
+    echo "ERROR: Location of the web server's log is not specified" >&2; exit 1;
+fi
+
+log_file=$(realpath $1)
+[email protected]
+
+if [ ! -f "$log_file" ]; then
+    echo "ERROR: Log file does not exist" >&2; exit 1;
+fi
+
+(
+    echo -e 'Apache Web Server Access Logs - Summary\n'
+    echo -e 'STATUS\t\t-\tCOUNT'
+    cat $log_file | sed 's/.*HTTP\/1\.1\" \(...\).*/\1/g' | sort | uniq -c | awk '{printf " %s\t\t-\t %s\n", $2, $1}'
+    echo -e '\nIP ADDRESS\t-\tHITS'
+    cat $log_file | sed 's/ .*//g'  | sort | uniq -c | awk '{printf "%s\t-\t %s\n", $2, $1}'
+) > /tmp/log_summary
+
+
+cat /tmp/log_summary | mail -s "Apache Web Server Access Logs - Summary" $email_id
+if [[ $? != 0 ]]; then
+    echo "ERROR: Error in sending email to $email" >&2; exit 1;
+fi
+
+path_to_script=$(realpath "$0")
+if ! (crontab -l | grep -Fxq "0 * * * * $path_to_script $log_file"); then
+    crontab -l | { cat; echo "0 * * * * $path_to_script $log_file"; } | crontab -
+    echo "Script added to Cron"
+fi
+
+exit 0
+# MailUtils should be configured

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A4.sh

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+#!/bin/bash
+
+if [ -z "$1" ]; then
+    echo "ERROR: Webserver's port is not specified in the arguments" >&2; exit 1;
+fi
+
+listening_port=$1
+
+netstat -lnt | grep -q ":$1 "
+
+if [[ $? != 0 ]]; then
+    echo "ERROR: Web server is not running";
+    /etc/init.d/apache2 restart
+fi
+
+path_to_script=$(realpath "$0")
+if ! (crontab -l | grep -Fxq "*/1 * * * * $path_to_script $listening_port"); then
+    crontab -l | { cat; echo "*/1 * * * * $path_to_script $listening_port"; } | crontab -
+    echo "Script added to Cron"
+fi
+
+exit 0

Extra Scripts/DevOps-Sem3- Lab Scripts/2.2 Automation Scripts/2.2.1 Automation Scripts that save Time and Effort/lab-A5.sh

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+#!/bin/bash
+
+if [[ $(id -u) -ne 0 ]] ; then
+    echo "ERROR: Please run as root." ; exit 1 ;
+fi
+
+if [ ! -f "/opt/forbidden_commands.txt" ]; then
+    echo "ERROR: The file /root/forbidden_commands.txt does not exist" >&2; exit 1;
+fi
+
+for user in $(getent passwd | cut -d : -f 6 | grep '/home' | sed 's:$:/.bashrc:'); do
+    cat $user | grep -q 'validate_commands'
+    if [[ $? != 0 ]]; then
+        echo '
+function validate_commands {
+    cat /opt/forbidden_commands.txt | while read command; do
+        if [ "$BASH_COMMAND" == "$command" ]; then
+            echo "Sorry! \"$BASH_COMMAND\" cannot be executed";
+            exit 1;
+        fi
+    done
+}
+trap validate_commands DEBUG' >> $user
+    fi
+done
+
+exit 0