http://snippets.dzone.com/posts Sun, 27 Jul 2008 03:43:44 GMT DZone Snippets: usermod code http://snippets.dzone.com/posts/show/5191 Block many users in a system using a text file as argument <br /> <br /><code> <br />#!/bin/bash <br /> <br />#******************************************************************************# <br /># BlockManyUsers.sh - Block many users in a system using a text file # <br /># as argument # <br /># Copyright (C) 2008 - written by flynets - <flynets<at>autistici<dot>org> # <br /># BlockManyUsers is free software: you can redistribute it and/or modify # <br /># it under the terms of the GNU General Public License as published by # <br /># the Free Software Foundation, either version 3 of the License, or # <br /># any later version. # <br /># # <br /># BlockManyUsers is distributed in the hope that it will be useful, # <br /># but WITHOUT ANY WARRANTY; without even the implied warranty of # <br /># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # <br /># GNU General Public License for more details. # <br /># # <br /># You should have received a copy of the GNU General Public License # <br /># along with this program. If not, see <http://www.gnu.org/licenses/>. # <br />#******************************************************************************# <br /> <br /># Checks if you have the right privileges <br />if [ "$USER" = "root" ];then <br /> # Checks if there is an argument <br /> [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; } <br /> # checks if there a regular file <br /> [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; } <br /> TMPIN=$(mktemp) <br /> # Remove blank lines and delete duplicates <br /> sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN" <br /> <br /> NOW=$(date +"%Y-%m-%d-%X") <br /> LOGFILE="BMU-log-$NOW.log" <br /> <br /> for user in $(more "$TMPIN"); do <br /> # Checks if the user already exists. <br /> cut -d: -f1 /etc/passwd | grep "$user" > /dev/null <br /> OUT=$? <br /> if [ $OUT -eq 0 ];then <br /> # block selected user <br /> /usr/sbin/usermod -L "$user" <br /> # save user info in a file <br /> echo The user \"$user\" has been blocked. >> "$LOGFILE" <br /> else <br /> echo >&2 Error the user account \"$user\" doesnt exists! >> "$LOGFILE" <br /> fi <br /> done <br /> rm -f $TMPIN <br /> exit 0 <br />else <br /> echo >&2 ERROR: You must be a root user to execute this script. <br /> exit 1 <br />fi <br />exit 0 <br /></code> Sun, 02 Mar 2008 14:23:38 GMT http://snippets.dzone.com/posts/show/5191 flynets (Flynets is an italian student of computer science with passion for GNU/Linux and hacktivism.)