changing directory name

assn1/prob1

+#!/bin/bash
+#Yegeon Seo
+
+#ARCHIVE="$PWD"
+
+#Number of dir
+dir=$(ls -d $ARCHIVE/*/ | wc -l)
+
+#Number of prob 
+prob=$(ls -R -l $ARCHIVE/*/ | egrep -n "prob*" | wc -l )
+
+#Printing output
+echo -e "$dir\t$prob"

assn1/prob2

+#!/bin/bash
+#Yegeon Seo
+
+#ARCHIVE=$PWD
+
+#placeholders
+largestThread=0
+largestFile=""
+
+#Loop through each folder
+for folder in $ARCHIVE/*/; do
+	if [ -d $folder ]; then
+		cd $folder
+
+		#For each file in the folder, get the name of the file and the number of thread
+		for file in *; do
+			filename="${file%_*}"
+			numThread=$(find -name "$filename*"| wc -l)
+				
+
+			#if the number of thread is greater than current largest thread, replace	
+			if [ $numThread -gt $largestThread ]; then
+				largestThread=$numThread
+				largestFile=$filename
+			fi
+		done
+		cd ..
+	fi
+done
+
+#print the output
+printf "$largestThread\t$largestFile\n"
+
+
+

assn1/prob3

+#!/bin/bash
+#Yegeon Seo
+
+#ARCHIVE="$PWD"
+
+#Exit if there is no argument
+if [ $# == 0 ]; then 
+	echo "No arguments!! Exiting the program/" ; exit
+fi
+
+#Format the date
+date="$3/$2/$1"
+
+#Search ARCHIVE using grep to get files
+files=$(grep -rl $date $ARCHIVE)
+
+#Print matching files
+for file in $files; do
+	echo $(basename $file)
+done
+
+
+
+
+

assn1/prob4

+#!/bin/bash
+#Yegeon Seo
+
+#ARCHIVE=$PWD
+
+#Read all the files starting with email regular expression and store it in a temp file
+grep -oErh "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" $ARCHIVE/* >> tempfile
+
+#extract hostname from the email
+while read email; do
+	extension="${email##*@}"
+	echo $extension >> temp
+done < tempfile
+
+#Sort hostmames and remove duplicateds. Order by number in descending order.
+sort --ignore-case temp | uniq -cdi | sort -nr -o temp
+
+#Print hostnames and the number of messages sent using awk
+awk '{print $2, $1}' temp
+
+#remove temp files made
+rm temp tempfile
+
+
+
+
+