echo “AJ22 aK12 0082″|tr ‘[:alpha:]‘ ‘[0*]‘

Can somebody post a tr command to accomplish this.
–Thanks

tr ‘,’ ‘ ‘ output.csv

In the previous comment i did mistake while typing .

tr ‘,’ ‘ ‘ output.csv

After the above script has been executed, its giving the “Unable to Read” error message when i was trying to open the converted file such “output.csv”.
For the small file its not giving any error, but when i m trying to covert the 8mb file it gives the above error message..

Please help me ASAP

thanks in advance

for i in *.
do
# convert uppercase to lowercase
n=”$(echo ${i} | tr [:lower:] [:upper:])”

# replace whitespaces with underscores
n=”$(echo “${n}” | tr [:blank:] ‘_’)”

# replace dots with underscores
n=”$(echo “${n}” | tr ‘.’ ‘_’)”

# replace hypens with underscores
n=”$(echo “${n}” | tr ‘-’ ‘_’)”

# replace multiple underscores
n=”$(echo “${n}” | tr -s ‘_’)”

# remove numbers at the beginning
n=”$(echo “${n}” | sed ‘s/^[0-9]*//’)”

# remove underscores at the beginning
n=”$(echo “${n}” | sed ‘s/^\_//’)”

# correct file ending
n=”$(echo “${n}” | sed ‘s/\_mp3/\.mp3/’)”

# rename file
mv -v “$i” “$n”;
done

find /path/to/dir -iname "*.mp3" -print0 | while read -d $'\0' file; do your-script.sh "$file"; done

Create your-script.sh to rename each file:

#!/bin/sh
       i="$@"
        # convert uppercase to lowercase
        $n="$(echo ${i} | tr [:upper:] [:lower:])"
        # replace whitespaces with underscores
        $n="$(echo ${n} | tr [:blank:] '_')"
        # replace dots with underscores
        $n="$(echo ${n} | tr '.' '_')"
        # replace hypens with underscores
        $n="$(echo ${n} | tr '-' '_')"
        # replace multiple underscores
        $n="$(echo ${n} | tr -s '_')"
        # remove numbers at the beginning
        $n="$(echo ${n} | sed 's/^[0-9]*//')"
        # remove underscores at the beginning
        $n="$(echo ${n} | sed 's/^\_//')"
        # correct file ending
        $n="$(echo ${n} | sed 's/\_mp3/\.mp3/')"
        # rename file
        mv -v "$i" "$n";

HTH

Nice Tutorial. I tried to write a small shell script to rename my mp3-files, but it doesn’t work. What is wrong with it? Can someone help me?

Greets, Andy

for i in "*.[mM][pP]3";
do
        # convert uppercase to lowercase
        $n="$(echo ${i} | tr [:upper:] [:lower:])"
        # replace whitespaces with underscores
        $n="$(echo ${n} | tr [:blank:] '_')"
        # replace dots with underscores
        $n="$(echo ${n} | tr '.' '_')"
        # replace hypens with underscores
        $n="$(echo ${n} | tr '-' '_')"
        # replace multiple underscores
        $n="$(echo ${n} | tr -s '_')"
        # remove numbers at the beginning
        $n="$(echo ${n} | sed 's/^[0-9]*//')"
        # remove underscores at the beginning
        $n="$(echo ${n} | sed 's/^\_//')"
        # correct file ending
        $n="$(echo ${n} | sed 's/\_mp3/\.mp3/')"
        # rename file
        mv -v "$i" "$n";
done

Avoid shell escape, enter:
echo 'ab(cde)fg' | tr "()" "~~"
OR
echo ab\(cde\fg | tr "()" "~~"

1. Replace many different chars with one same char

ab(cde)fg -> ab~cde~fg
echo ab(cde)fg | tr “()” “~~”

echo a1234b | tr “[0-9]” “A”
a1234b ### hope aAAAAb
echo a1234b | tr “[0-9]” “AAAA”
aAAA4b
echo a1234b | tr “[0-9]” “AAAAA”
aAAAAb

2. replace one char with two chars

a~b -> a==b

Thanks

Please help me

Exercise 2: Write a shell script (called words-no.sh) that counts the number of distinct words in a text file given as Argument.

Remark: White space characters are spaces, tabs, form feeds, and new lines. Use the tr, sort, grep. wc.

Exercise 3: Write a shell script (called cleancore.sh) that removes unwanted files from a directory and its subdirectories.
Argument 1 is the directory where to start the search. It defaults to your home directory (If there is no directory by this name).
Argument 2 after the directory is standard file-name that match the files that are to be removed, it defaults is ‘core’.

I think this would delete the word nameserver, but also all occurrences of characters from set {nameserver}, which could probably create big mess.

Proper command should be:
sed ‘s/nameserver//g’ ns.ipaddress.txt