DZone Snippets: sysadmin code

Linux Shell script to rename files

Sun, 02 Mar 2008 16:13:16 GMT

Before rename command I was using following shell script to rename my mp3s



#!/bin/bash

# To remove blank space

if [ $# -eq 0 ];

then

 echo "Syntax: $(basename $0) file-name [command]"

 exit 1

fi

FILES=$1

CMD=$2

for i in $FILES

do

# remove all blanks and store them OUT

OUT=$(echo $i | sed 's/  *//g')

if [ "$CMD" == "" ];

then

#just show file

echo $OUT

else

#else execute command such as mv or cp or rm

[ "$i" != "$OUT" ] && $($CMD  "$i"  "$OUT")

fi

done

Block many users in a system v0.1.1

Sun, 02 Mar 2008 14:23:38 GMT

Block many users in a system using a text file as argument



#!/bin/bash



#******************************************************************************#

# BlockManyUsers.sh - Block many users in a system using a text file           #

#                       as argument                                            #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   #

#   BlockManyUsers is free software: you can redistribute it and/or modify     #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.                                                         #

#                                                                              #

#   BlockManyUsers is distributed in the hope that it will be useful,          #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the               #

#   GNU General Public License for more details.                               #

#                                                                              #

#   You should have received a copy of the GNU General Public License          #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ];then

   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="BMU-log-$NOW.log"



   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

         # block selected user

         /usr/sbin/usermod -L "$user"

         # save user info in a file

         echo The user \"$user\" has been blocked. >> "$LOGFILE"

      else

        echo >&2 Error the user account \"$user\" doesnt exists! >> "$LOGFILE"

      fi

   done

   rm -f $TMPIN

   exit 0

else

   echo >&2 ERROR: You must be a root user to execute this script.

   exit 1

fi

exit 0

Add many users in a Debian system v0.2

Sun, 13 Jan 2008 17:25:42 GMT

Create many users in a Debian system using a text file as argument



#!/bin/bash



#******************************************************************************#

# AddManyUsers-deb.sh - Create many users in a Debian system using a text file #

# 			as argument					       #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   # 

#   AddManyUsers-deb is free software: you can redistribute it and/or modify   #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.							       #

#									       #

#   AddManyUsers-deb is distributed in the hope that it will be useful,	       #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	       #

#   GNU General Public License for more details.			       #

#									       #

#   You should have received a copy of the GNU General Public License	       #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ]

then



# CHANGE THIS PARAMETERS FOR A PARTICULAR USE

PERS_HOME="/home/"

PERS_SH="/bin/bash"



   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates 

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="AMU-log-$NOW.log"

   

   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

   	 echo >&2 "ERROR: User account: \"$user\" already exists."

	 echo >&2 "ERROR: User account: \"$user\" already exists." >> "$LOGFILE"

      else

	 # Create a new user

         /usr/sbin/useradd -d "$PERS_HOME""$user" -s "$PERS_SH" -m "$user"

	 # gpw must be installed on debian system

	 pass=$(gpw 1 8)

         echo $user:$pass | chpasswd

	 # save user and password in a file

	 echo -e $user"\t"$pass >> "$LOGFILE"

	 echo "The user \"$user\" has been created and has the password: $pass"

      fi

   done

   rm -f "$TMPIN"

   exit 0

else

   echo >&2 "ERROR: You must be a root user to execute this script."

   exit 1

fi

Add many users in a Red Hat system v0.2

Sun, 13 Jan 2008 17:21:34 GMT

Create many users in a RedHat system using a text file as argument



#!/bin/bash



#******************************************************************************#

# AddManyUsers-rh.sh - Create many users in a Red Hat system using a text file #

# 			as argument					       #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   # 

#   AddManyUsers-rh is free software: you can redistribute it and/or modify    #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.							       #

#									       #

#   AddManyUsers-rh is distributed in the hope that it will be useful,	       #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	       #

#   GNU General Public License for more details.			       #

#									       #

#   You should have received a copy of the GNU General Public License	       #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ]

then



# CHANGE THIS PARAMETERS FOR A PARTICULAR USE

PERS_HOME="/home/"

PERS_SH="/bin/bash"



   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates 

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="AMU-log-$NOW.log"

   

   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

   	 echo >&2 "ERROR: User account: \"$user\" already exists."

	 echo >&2 "ERROR: User account: \"$user\" already exists." >> "$LOGFILE"

      else

	 # Create a new user

         /usr/sbin/useradd -d "$PERS_HOME""$user" -s "$PERS_SH" -m "$user"

	 # passwdgen must be installed

	 pass=$(passwdgen -paq --length 8)

         echo $pass | passwd --stdin $user

	 # save user and password in a file

	 echo -e $user"\t"$pass >> "$LOGFILE"

	 echo "The user \"$user\" has been created and has the password: $pass"

      fi

   done

   rm -f "$TMPIN"

   exit 0

else

   echo >&2 "ERROR: You must be a root user to execute this script."

   exit 1

fi

Simple mySQL backup script for cron

fak3r (fak3r) — Wed, 20 Jun 2007 15:01:39 GMT

Simple mySQL backup script for cron - backs up all databases, saves the last 4 copies.



#!/bin/bash



# modify the following to suit your environment

export DB_BACKUP="/backup/mysql_backup"

export DB_USER="root"

export DB_PASSWD="********"



# title and version

echo ""

echo "mySQL_backup"

echo "----------------------"

echo "* Rotating backups..."

rm -rf $DB_BACKUP/04

mv $DB_BACKUP/03 $DB_BACKUP/04

mv $DB_BACKUP/02 $DB_BACKUP/03

mv $DB_BACKUP/01 $DB_BACKUP/02

mkdir $DB_BACKUP/01 



echo "* Creating new backup..."

mysqldump --user=$DB_USER --password=$DB_PASSWD --all-databases | bzip2 > $DB_BACKUP/01/mysql-`date +%Y-%m-%d`.bz2

echo "----------------------"

echo "Done"

exit 0

PHP - Change Active Directory Password

amandaemily (Amanda Emily) — Wed, 23 May 2007 18:13:47 GMT



$username=$_POST['user_name'];

//print $username;



$ldap = ldap_connect($config['ldapServers'], 636);

ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);

ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);

  if ($ldap)

{

$bind = ldap_bind($ldap, $config['ldapUsername'], $config['ldapPassword']);

$filter="(sAMAccountName=$username)";

$result = ldap_search($ldap,"dc=yourcompany,dc=com",$filter);

//var_dump($results); 

        ldap_sort($ldap,$result,"sn");

       $info = ldap_get_entries($ldap, $result);

       for ($i=0; $i<$info["count"]; $i++)

       {

echo "You are changing the password for  ". $info[$i]["givenname"][0] .", " . $info[$i]["sn"][0] ." (" . $info[$i]["samaccountname"][0] .") to " . $_POST['user_pass'] ."\n";

             $passwd1 = $_POST['user_pass'];

              $userDn = $info[$i]["distinguishedname"][0];

              $newPassword = $passwd1;

      $newPassword = "\"" . $newPassword . "\"";

      $len = strlen($newPassword);

      for ($i = 0; $i < $len; $i++){

            $newPassw .= "{$newPassword{$i}}\000";}

      $newPassword = $newPassw;

      $userdata["unicodePwd"] = $newPassword;

      $result = ldap_mod_replace($ldap, $userDn , $userdata);

      if ($result) echo "Your password has been changed!" ;

      else echo "There was a problem changing your password, please call IT for help"; 

 }

         }

        @ldap_close($ldap);

?>

Perl - Cisco VLAN Removal

amandaemily (Amanda Emily) — Wed, 23 May 2007 18:09:33 GMT

// Perl - Cisco VLAN Removal
// new.txt format
// ipaddress|loginpass|enablepass|gigabitEthernet3/48|20



#!c:/perl/bin/perl.exe



use Net::Telnet::Cisco;



open(CISCO,'new.txt');

 while () {

 chomp;

my @fields = split(/\|/, $_);



my $host = $fields[0];

my $login = $fields[1];

my $telnet = $fields[2];

my $interface = $fields[3];

my $vlan = $fields[4];



#print "Content-type:text/html\n\n";

#print "Switch = $host    
";

#print "Command =  username $macaddr password $macaddr  
";



$session = Net::Telnet::Cisco->new(Host => "$host", Input_log => "input.log");

$session->login(Password => "$login");

$session->enable("$telnet");

$session->cmd("config t");

$session->cmd("int $interface");

$session->cmd("no switchport access vlan $vlan");

$session->cmd("no switchport mode access");

$session->cmd("exit");

$session->close();

}

Perl - Cisco Wireless Managment

amandaemily (Amanda Emily) — Wed, 23 May 2007 18:06:00 GMT

// Perl script to update MAC access table on Cisco IOS-based AiroNets



#!c:/perl/bin/perl.exe



# Update Aironet IOS mac addresses



use Net::Telnet::Cisco;

use vars qw($r @data);



print "Content-type:text/html\n\n";



read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});

@pairs = split(/&/, $buffer);

foreach $pair (@pairs) {

    ($name, $value) = split(/=/, $pair);

    $value =~ tr/+/ /;

    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;

    $FORM{$name} = $value;

}





$macaddr = $FORM{'command'};

#$macaddr = 'AABBCCDDEEFF';



print "using command username $macaddr password 0$macaddr

";



	

print "Updating AP 127.0.0.1 (conference center)    
";

$r = Net::Telnet::Cisco->new(Host=>"127.0.0.1");

	$r->login("login","password");

die($r->errmsg) unless($r->enable("password"));

	$r->cmd('terminal length 0');

	$r->cmd('config t');

	$r->cmd("username $macaddr password $macaddr");

	$r->cmd("username $macaddr autocommand exit");

	$r->cmd("exit");

	$r->cmd("write memory quiet");

	$r->cmd('terminal length 24');

	$r->close();

print "Done!";

command to install mysql gem in FC5

adevadeh (adeh) — Thu, 21 Dec 2006 00:25:21 GMT

// installs the mysql gem with the correct locations of the mysql install, for some reason the installer can't find it on its own.



gem install mysql -- --with-mysql-include=/usr/include/mysql --with-mysql-lib=/usr/lib/mysql

Simple process watchdog

thowland (Tim Howland) — Thu, 23 Mar 2006 19:20:21 GMT

I had a problem where an important monitoring daemon was committing sepuku every night between 3 and 4 am. While debugging it, I whipped up the script below.

Basically, it checks to see if the process ID file is present, and if it is, checks that the process is actually running. If not, it invokes the restart command.

It outputs info to syslog so you can check it out the next day.

Written in perl, requires Sys::Syslog. Tested on Linux (your ps command details may vary on other unices). Not worth bothering with this on windows.



#!/usr/bin/perl



use Sys::Syslog qw(:standard :macros);



my $pidfile = "/usr/local/bs/adm/uxmon.pid";

my $check_command = "uxmon";

my $start_command = "/etc/init.d/bigsister restart";



openlog("ProcessWatcher", "pid",LOG_LOCAL0);



if (! -e $pidfile) {

    syslog(LOG_WARNING, "Process ID file not found, restarting application");

    &restart_proc;

    exit;

}



open (IN, $pidfile) || syslog(LOG_ERR, "Couldn't read $pidfile- $!");

my $pid = ;

chomp $pid;



my $ret = `ps -p $pid -o comm=`;

if ($ret != $check_command) {

    syslog(LOG_ERR, "Return value mismatch, restarting Process");

    &restart_proc;

    exit;

}







sub restart_proc() {

    my $msg = `$start_command`;

    syslog (LOG_INFO, "Restarting Process returned: $msg");

}