Klar med första scriptet till Övning 3, labb 4 samt skapat stubb till script 2

Labb4/ovning3_script1.sh

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+#!/bin/bash
+
+# Jack-Benny Persson
+# LX13
+# Övning 3, version1, labb 4
+# Replace words
+
+# Define some variables
+File="$1"
+Old="$2"
+New="$3"
+
+# Sanity checks
+if [ $# -ne 3 ]; then
+	if [ $# -eq 1 ]; then      # If there is just one arg and
+		if [ -r $# ]; then # if the file exists,
+			cat $1     # just print it
+		fi
+		else
+			echo "Usage $0 <filename> <old_word> <new_word>"
+			exit 2 # If it dosen't, exit and print usage
+		fi
+fi
+
+if [ ! -r $File ]; then # If there is no such file
+	echo "We can't read that file"
+	exit 2
+fi
+
+# Main script
+Data=`cat $1` # Put the content of the file in Data
+Alt=${Data/$Old/$New} # Replace the word (kinda lika sed 's/old/new/')
+
+echo "$Alt" # Print the content with the replaced words
+
+exit 0