Shell Programming and Scripting

sed -e 's/#/LOLOLOL/g;s/@/MOMOMO/g;s/\([[:punct:]]\)//g;s/LOLOLOL/#/g;s/MOMOMO/@/g;' file

sed "s#[]\
        $(
          awk 'BEGIN {for (i=31;++i<127;) printf ("%c", i); printf "\n"}' |
                sed 's/[^[:punct:]]\|[]#@]//g'
         )-]##g" file

#!/bin/bash
echo "Enter the type of file: "
read f

a=(*.$f)

for (( i =0; i < ${#a[i]}; i++ ))
do
echo $i "  " ${a[i]}
done

echo "Enter the filenumber for processing:"
read j

echo "Enter the punctuation mark that you wish to substitute:"
read c

r=${a[$j]}

for i in $c
do
cat $r | sed 's/"${c[i]}"/^g/g' > revised.txt 
done

#!/bin/bash

echo "Enter the type of file: "
read f

a=(*.$f)

for (( i =0; i < ${#a[i]}; i++ ))
do
echo $i "  " ${a[i]}
done

declare -a z=('^g' '^g^g' '^g^g^g'' ^g^g^g^g' '^g^g^g^g^g')

echo "Enter the filenumber for processing:"
read j
echo "Enter the punctuation for substitute:"
read c

for i in "$c"
do
cat ${a[j]} | sed s/"$c"/$z/g > revised1.txt
done

cat revised1.txt | sed 's/[[:punct:]]//g' > revised2.txt


for i in $z
do
cat revised2.txt | sed s/$z/"$c"/g > final_rev.txt
done

# cat myfile
Bb2$£¤µ%§\°~`!@#$%^&*()_-+={[}]|:;"'<,>.?/
# sed 's/[^#@[:alnum:]]*//g' myfile
Bb2µ@#
#