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The option character should be FOLLOWED by a colon, NOT preceded!

You seem to have at least four errors in your script:
- You have a colon preceding ALL option chars. man ksh:
- Two of your $OPTARG expansions have leading unpaired double quotes making the "p"...

You could try using file and checking if each file found appears to be a cert store of some kind, then using openssl to actually read it.

Introduction

Originally, we only had one shell on unix. When ran a command, the shell would attempt to invoke one of the exec() system calls on it. It the command was an executable, the exec would...

Over the past few weeks, I saw a couple of threads requesting recursive ftp:
Copying files between 2 Unix server (https://www.unix.com/showthread.php?s=&threadid=8940)
ftp from NT to UNIX...

#! /usr/bin/ksh


#
# HardFeed -- Harvest A Remote Directory via
# Ftp Enhanced Exhaustive Duplication
#
# Perderabo 11-23-02

VERSION="1.1" # 03-16-04

USAGE="\...

Folks, I really appreciate the kudos. Thanks!

But if everyone who finds this script useful was to post a thank-you note, we will get a lengthy thread with little content.

So let's keep the...

#
# Function to decode an "ls -l" line.

lsdcode() {

typeset -Z2 nmonth day
typeset -i8 octal

#
# get the line, get the first character, split line into words

line="$1"...

You're trying to send input into the passwd program's stdin. If that were possible, my script would have no purpose. passwd ignores stdin. It opens /dev/tty directly. Then it inhibits character...