Question

I want to write a bash script that sorts the input by rules in different files. The first rule is to write all chars or strings in file1. The second rule is to write all numbers in file2. The third rule is to write all alphanumerical strings in file3. All specials chars must be ignored. Because I am not familiar with bash I don t know how to realize this.

Could someone help me?

Thanks,
Haniball

Thanks for the answers,

I wrote this script,

#!/bin/bash

inp=0 echo "Which filename for strings?" 
read strg 
touch $strg
echo "Which filename for nums?"
read nums
touch $nums
echo "Which filename for alphanumerics?"
read alphanums
touch $alphanums
while [ "$inp" != "quit" ]
do
 echo "Input: "
 read inp
 echo $inp | grep -o '\<[a-zA-Z]+>' > $strg
 echo $inp | grep -o '\<[0-9]>' > $nums
 echo $inp | grep -o -E '\<[0-9]{2,}>' > $nums
done

After I ran it, it only writes string in the stringfile.

Greetings, Haniball

Answer 1

grep is sufficient (your question is a bit vague. If I got something wrong, let me know…)

Using the following input file:

this is a string containing words,
single digits as in 1 and 2 as well
as whole numbers 42 1066

all chars or strings

$ grep -o '\<[a-zA-Z]\+\>' sorting_input
this
is
a
string
containing
words
single
digits
as
in
and
as
well

all single digit numbers

$ grep -o '\<[0-9]\>' sorting_input
1
2

all multiple digit numbers

$ grep -o -E '\<[0-9]{2,}\>' sorting_input
42
1066

Redirect the output to a file, i.e. grep ... > file1