Shell Programming and Scripting

i have code to generate passwords but the issue is the duplicated chars
so can any one help and give me function to check and verify if there is any duplicated chars as also the script uses capitals and small letters and numbers only
many thx guys

Do you mean anywhere in the string, or consecutively?

Code:

sed -n 's/\(.\).*\1/&/p'

Remove the bit in red, if the latter.

i need to check if the word have duplicated characters or not i don want to remove the duplicated

like

Manm --> failed
Man --> pass

Hi.

You asked for something that can identify duplicate characters.

You didn't answer my question, as to whether those characters could be consecutive, or not.

The code given will remove nothing, and will print the same string back if it contains duplicate characters, otherwise it will print nothing. Keyword here being "print" (emphasis on a lack of the word "remove"!)

You could use that as a basis for what you do next.

thanks man for your replay

what im try to do is genrtae uniq passwords by script
ex: 99cfdc6b this is an output for script but i don't accept this as password coz i need to check

if the password contains duplicated chars or not so if it contains it will be rejected and will generate new one if it didn't have any duplicated chars it will accept as passwords
i hope i clarify the situation here

---------- Post updated at 02:43 PM ---------- Previous update was at 02:34 PM ----------

one of my frinds complete this issue in .net C# the code is like this

Code:

static void Main(string[] args)
{

string str = Console.ReadLine();

str = str.ToLower();
int len1 = str.Length - 1;

for (int i = 0; i < str.Length; i++)
{

for (int x = 0; x <= len1; x++)
{

if (x == i)
{
continue;
}
if (str[i] == str[x])
{
goto A;
}
}
}
Console.WriteLine("Nothing Repeated");
return;
A:
Console.WriteLine("Some Characters are reapeated");
return;

}


but im unable to translate this into linux coz im not 100% good with shell scripts

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