Sending mails using the command line

First check. whether Sendmail is running;

#/etc/init.d/sendmail status

if the status shows that it;s not, then start it;
#/etc/init.d/sendmail restart

then , send mails using either the mail or mutt command;

#ehco "body of the mail" | ,ail -s "Subject of the mail" toAddress

Give the recipient's mail ID in place of toAddress.
As for the body of the mail, you can also redirect it from a file, as follows,
#mail -s "subject of the mail" toAddress < body_mail.txt
If u want to send a file as an attachment, you can use mutt instead:

#echo "body of the mail" | mutt -s "subecjt of the mail" \-a fileToAttach.txt toAddress


Give the recipient's email ID in place of toAddress.

Let us ping range of IPs machine

Hi How to check the range of IPs with script

#!/bin/bash
#Author:- Deepak G Ghule
#Date :- 25/10/2009
#Subject :- Let us ping range of IPs to know the status of machine (UP/DOWN)
for i 192.168.1.{1..255}; //checks 192.168.1.x class of IPs
do
ping -c2 $i > /dev/null;
[ $? -eq 0 ] && echo $i is up
trap "exit" SIGINT //To force exit when Ctrl+c keystroke is applied
done

now save it as net.sh

now give the execute persmission with following command
[crackmind@crakmind.com~]#chmod +x /netsh.sh


thanks for visit my blogs

Useradd via shell script IN Linux

#!/bin/bash
#if [ $(id -u) -eq 0 ]; then
echo "Enter username"
read user
echo "User password"
read pass
egrep "$user" /etc/passwd >/dev/null
if [ $? -eq 0 ]; then
echo "$user exist"
exit 1
else
pass1=$(perl -e 'print crypt($ARGV[0], "pass")' $pass)
useradd -m -p $pass1 $user
echo "User has added successfully" || echo "failed to add username"
fi

To check desire machine status for up or down by IP address using ping test

#!/bin/bash
#Author- Deepak G Ghule
#Subject- To check desire ip address
echo "Plz enter Your desire IP address to ping test"
read ip
ping -c 4 $ip &>/dev/null
if [ $? -eq 0 ]; then
echo "Machine is up now"
else
echo "Machine is down"
fi

To know Disk space Alert by mail in Linux

#!/bin/bash
#Subject:- To know Disk space alert by mail
#Author- Deepak G Ghule
echo "Please put the partition to check"
read partition
var=`echo "$(df -k $partition | awk 'NR > 1 { print $5 }' | cut -d "%" -f1)"`
if [ $var -lt 75 ] && [ $var -lt 80 ]; then
echo "System is working with $var"
echo $var > mail -s "Disk space is use"
elif [ $var -lt 85 ]; then
echo $var > mail -s "Disk space is use" root
echo "system is in warning with $var:"
elif [ $var -gt 85 ]; then
echo $var > mail -s "Disk space is use" root
echo "System in dangerous zone"
fi

Access Windows shares from the terminal

The following command will help you to access the Windows shares from Linux systems;

#kdir /mnt/win
#mount -t cifs //server-ip-or-machine name/share/mnt/win -o username=user.password=pass.domain=DOMAINNAME

And to unmount the share.use the command give below:

#umount /mnt/win

Aircel/Airtel GPRS on linux via USB cable/bluetooth using KPPP GUI tool

Steps for USB cable using KPPP configuration
1) connect ur nokia mobile to system

2)Check ur nokia connection as it's vendor and product number
[root@server1 ~]# lsusb
Bus 001 Device 001: ID 0000:0000
Bus 002 Device 004: ID 0421:0061 Nokia Mobile Phones
Bus 002 Device 003: ID 0e0f:0002
Bus 002 Device 001: ID 0000:0000

3)Add ur modem here with following command
[root@server1 ~]# sudo /sbin/modprobe usbserial vendor=0x421 product=0x061

4)add ur setting with following command
[root@server1 ~]# wvdialconf /etc/wvdial.conf
Scanning your serial ports for a modem.

ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud
ttyS0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud
ttyS0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.
ttyS1<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud
ttyS1<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud
ttyS1<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.
Port Scan<*1>: S2 S3
WvModem<*1>: Cannot get information for serial port.
ttyACM0<*1>: ATQ0 V1 E1 -- OK
ttyACM0<*1>: ATQ0 V1 E1 Z -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
ttyACM0<*1>: Modem Identifier: ATI -- Nokia
ttyACM0<*1>: Speed 4800: AT -- OK
ttyACM0<*1>: Speed 9600: AT -- OK
ttyACM0<*1>: Speed 19200: AT -- OK
ttyACM0<*1>: Speed 38400: AT -- OK
ttyACM0<*1>: Speed 57600: AT -- OK
ttyACM0<*1>: Speed 115200: AT -- OK
ttyACM0<*1>: Speed 230400: AT -- OK
ttyACM0<*1>: Speed 460800: AT -- OK
ttyACM0<*1>: Max speed is 460800; that should be safe.
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
WvModem<*1>: Cannot get information for serial port.
ttyUSB0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud
ttyUSB0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud
ttyUSB0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.

Found an USB modem on /dev/ttyACM0.
Modem configuration written to /etc/wvdial.conf.
ttyACM0: Speed 460800; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"
[root@server1 ~]#
[root@server1 ~]# vim /etc/wvdial.conf
[root@server1 ~]# wvdial
--> WvDial: Internet dialer version 1.54.0
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: AT+CGDCONT=1,"IP","aircelgprs","",0,0
AT+CGDCONT=1,"IP","aircelgprs","",0,0
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
~[7f]}#@!}!} } }2}#}$@#}!}$}%\}"}&} }*} } g}%~
--> Carrier detected. Starting PPP immediately.
--> Starting pppd at Sun Oct 4 03:25:12 2009
--> pid of pppd: 9507
--> Using interface ppp0
--> pppd: 60800
--> pppd: 60800
--> pppd: 60800
--> pppd: 60800
--> local IP address 10.183.117.164
--> pppd: 60800
--> remote IP address 10.6.6.6
--> pppd: 60800
--> primary DNS address 202.148.200.3
--> pppd: 60800
--> secondary DNS address 202.148.202.4
--> pppd: 60800
Caught signal #2! Attempting to exit gracefully...
--> Terminating on signal 15
--> pppd: 60800
--> Connect time 7.2 minutes.
--> pppd: 60800
--> pppd: 60800
--> pppd: 60800
--> Disconnecting at Sun Oct 4 03:32:23 2009

root@server1 proc]# cat /etc/wvdial.conf

[Dialer Defaults]
Modem = /dev/ttyACM0
Init1 = AT+CGDCONT=1,"IP","aircelgprs","",0,0
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Baud = 460800
#Init1 = ATZ
#Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = USB Modem
; Phone =
; Username =
; Password =
Username = a
Password = a
Phone = *99#
Stupid Mode = 1

check the kppp pakage and start ur linux in graphic mode with startx

open kppp-->applications-->internet-->kppp
click on configure-->click account tab and click on new-->Manual setup-->dial-->connection name--aircel
clikc add--enter a phone no as put-->*99#--ok-->0k
click on Modems tab-->>New-->Modem name--/dev/ttyAMC0-->modem device-->select /dev/ttyAMC0
now click on Modem tab-->Modem commands-->
Initialization strings1=AT+CGDCONT=1,"IP","aircelgprs","",0,0
Initialization strings2=ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
click -ok
Query Modem to test it-
click ok and ok
put the user name=a
password = a
now connect ur aircel gprs properly

Steps to configure gprs using bluetooth for KPPP

HOWTO: Airtel GPRS on Linux via Bluetooth

Here’s a mini HOWTO explaining how Airtel GPRS users can connect their linux boxes to the net using only a bluetooth connection from their phone. That’s right, no data cable required!

NOTE: I’ve only tried this on Debian but it should work fine on just about any distro.. use your distro’s package management tool instead of apt.

Follow these steps:

1. First make sure GPRS (Mobile Office) is enabled on your phone. This won’t work with Airtel Live :P

2. Install the Bluetooth utilities:

sudo apt-get install bluez-gnome bluez-utils

3. Find the MAC address of your phone:

hcitool scan

The output should be something like this:

Scanning ...
00:19:63:74:XX:YY saurav

Write down this address somewhere for future reference.

4. Now, determine the channel used for dial up networking using the MAC you just found:

sdptool browse 00:19:63:74:XX:YY

...
Service Name: Dial-up Networking
Service RecHandle: 0x10001
Service Class ID List:
"Dialup Networking" (0x1103)
"Generic Networking" (0x1201)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100

In this case, the required channel is channel no. 1. This will be used to configure the bluetooth connection.

5. Open up /etc/bluetooth/rfcomm.conf with your favorite editor.

sudo nano -w /etc/bluetooth/rfcomm.conf

Make it look something like this (replace with your MAC address and channel):

rfcomm0 {
bind yes;
device 00:19:63:74:XX:YY;
channel 1;
comment "Dial-up Networking";
}

6. Next, restart bluetooth services:

sudo /etc/init.d/bluetooth restart

7. We’re done with the bluetooth configuration. Now we need to configure wvdial:

8. Install wvdial

sudo apt-get install wvdial

9. Run wvdialconf. This generates a dummy /etc/wvdial.conf

sudo wvdialconf

10. Now we need to edit /etc/wvdial.conf and feed in the values for the GPRS connection:

sudo nano -w /etc/wvdial.conf

It should look something like this:

[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
stupid mode = 1
Modem Type = Bluetooth Modem
Baud = 115200
New PPPD = yes
Modem = /dev/rfcomm0
ISDN = 0
Phone = *99#
Username = a
Password = b

11. We’re done. Make sure Bluetooth is turned on in your phone and enter the following command to connect:

sudo wvdial

It might ask you for a PIN the first time you connect, in which case you must enter the same digits in the phone and PC in order to pair them.

12. Press Ctrl-C when you want to disconnect.

To check Linux service is on or off

#!/bin/bash
# Subject:- To check service is on or off.
#Developed by DEEPAK G GHULE
#Date 13/10/2009
date
echo "Plz Enter service name for service status:"
read service
ps -C $service &>/dev/null
if [ $? -eq 0 ]; then
echo "$service is running"
else
echo "$service is not running"
fi
PS3="Please select the option to restart the $service Yes[1]/No[2]:"
LIST="Yes No"
select i in $LIST
do
if [ $i = "Yes" ]; then
chkconfig --level 35 $service on
/etc/init.d/$service restart &>/dev/null
echo $service is running now
elif [ $i = "No" ]; then
chkconfig --list | grep $service
fi
break
done