Linux Systems - Assignment 21

#!/bin/bash

if [ $# -gt 0 ]

then

if [ -f $1 ]

then

if [ -s $1 ]

then

total_lines=`cat $1 | wc -l`

if [ $total_lines -ge 5 ]

then

echo "Before replacing"

cat $1

percent=$((total_lines/5))

for i in `seq $percent`

random_number=`shuf -i 1-$total_lines -n1`

sed -i "$random_number s/.*/<-----------Deleted------------>/" $1

done

echo "After replacing"

cat $1

else

echo "Error: Not enough lines."

else

echo "Error : $1 is empty file. So can’t replace the string."

else

echo "Error : No such a file."

else

echo "Error : Please pass the file name through command line."

sachin