Test Nameserver

for i in a b c d e f g h i j k l m; do echo "searching for root server $i"; dig ${i}.root-servers.net @${i}.root-servers.net +short ; done;

Set Sync Clock n Date with NTP Server

sync with an ntp server using:

ntpdate <ip @ url>

rdate -s <ip @ url>

@@@@@ follow this step --->

1. Firstly, check whether the selected NTP server is accessible:

# ntpdate -q <ip address @ url>

For example:

# ntpdate -q 0.rhel.pool.ntp.org

2. When you find a satisfactory server, run the ntpdate command followed by one or more server addresses:

# ntpdate server_address

For instance:

# ntpdate 0.rhel.pool.ntp.org 1.rhel.pool.ntp.org

3. In most cases, these steps are sufficient. Only if you really need one or more system services to always use the correct time, enable running the ntpdate at boot time:

# chkconfig ntpdate on

NOTE :

If the synchronization with the time server at boot time keeps failing, i.e., you find a relevant error message in the /var/log/boot.log system log, try to add the following line to /etc/sysconfig/network:

NETWORKWAIT=1

Check Linux Version

cat /proc/ver
@
uname -a
@
cat /etc/redhat_realse

APN Settings

3G WAP & MMS CONFIGURATION

1. Press Menu > Settings > Wireless Controls > Mobile networks

2. Select Access Points Names

3. Press Menu button > Select New APN

4. Enter the following details for WAP settings:

Celcom 3g internet setting : MALAYSIA

Name : Celcom 3G Internet
APN : celcom3g
MCC : 502
MNC : 19
APN type : default

Celcom 3g MMS setting :

Name : Celcom 3G MMS
APN : celcom3g
MMSC : http://mms.celcom.net.my
MMS proxy : 10.128.1.242
MMS port : 8080
MCC : 502
MNC : 19
APN type : mms

Celcom 2g internet setting :

Name : Celcom 2G Internet
APN : celcom.net.my
MCC : 502
MNC : 19
APN type : default

Celcom 2g MMS setting :

Name : Celcom 2G MMS
APN : mms.celcom.net.my
MMSC : http://mms.celcom.net.my
MMS proxy : 10.128.1.242
MMS port : 8080
MCC : 502
MNC : 19
APN type : mms

Maxis 3g settings.:Malaysia

1.Name: maxis
2.APN: unet
3.Proxy:
4.Port:
5.Username: maxis
6.Password: wap
7.Server:
8.MMSC: http://172.16.74.100:10021/mmsc
9.MMS proxy:
10.MCC: 502 (default)
11.MNC: 12 (default)
12.APN type:

DiGi Data Setting

Name: DIGI Data - Internet

APN: diginet
MCC: 502
MNC: 16
APN Type: default

Name: DIGI MMS (WAP 2.0)

APN: digimms
username: mms
password: mms
Proxy: 203.092.128.160
Port: 80
MMSC: http://mms.digi.com.my/servlets/mms
MMS Proxy: 203.092.128.160
MMS Port: 80
MCC: 502
MNC: 16
APN Type: mms

check dir space on FreeBSD

du -sk * | sort -n


nms delete 


/var/spool/nagios/archives <--- delete inside

How to open many website on browser tab just one click using Chrome and Firefox

First of all after download this file.. please make sure ... u must delete the .txt extension on that file

thank u

For Google Chrome

For Mozilla Firefox

flush squid

how to flush squid

File size limit exceeded solution

squid dead but pid file exists solution

how to flush cache on squid

BEFORE START THIS PROGRESS PLZ MAKE SURE UR SQUID IS TOTALLY STOP

1.  Check squid cache location on your Linux system.  the default location may be at /var/spool/squid directory, but you can use command as show on the example below to check squid cache directory on your system.

[root@fedora10 ~]# cat /etc/squid/squid.conf | grep ^cache_dir

cache_dir ufs /var/spool/squid 4000 16 256

[root@fedora10 ~]#

2.  Verify squid cache directory by list contents inside squid cache directory.  The contents of squid cache directory should look like on example below.

[root@fedora10 ~]# ls /var/spool/squid

00  02  04  06  08  0A  0C  0E  swap.state

01  03  05  07  09  0B  0D  0F

[root@fedora10 ~]#Stop squid cache proxy server.

  In order to clear squid cache, we need to stop squid proxy first.  the step below show example to stop squid proxy server on Linux Fedora system.  NOTE:- Make sure that you stop squid proxy first before attempt to clear squid cache.

3.  Check squid proxy status.

[root@fedora ~]# service squid status

squid (pid  7593) is running...

[root@fedora ~]#

4.  Stop squid proxy server.

[root@fedora ~]# service squid stop

Stopping squid: ................                           [  OK  ]

[root@fedora ~]#

5.  Verify that squid proxy is stop.

[root@fedora ~]# service squid status

squid is stopped

[root@fedora ~]#

Create directory and move squid cache file.

Create new directory to temporary store the old squid cache files... why we shoud do this??? the answer... to minimize squid proxy downtime.  First we need to create directory and then move the old squid cache file to this directory.

6.  Make directory and verify.

[root@fedora ~]# mkdir /var/spool/squid/squid_cache_old

[root@fedora ~]#

[root@fedora ~]# ls /var/spool/squid/

00  02  04  06  08  0A  0C  0E  squid_cache_old  swap.state.last-clean

01  03  05  07  09  0B  0D  0F  swap.state
[root@fedora ~]#

7.  Then move and clear squid cache directory contents to /var/spool/squid/squid_cache_old directory.

[root@fedora ~]# mv /var/spool/squid/?? /var/spool/squid/squid_cache_old/

[root@fedora ~]# mv /var/spool/squid/swap* /var/spool/squid/squid_cache_old/

[root@fedora ~]#

8.  Verify the contents of the squid cache directory.

[root@fedora ~]# ls /var/spool/squid/

squid_cache_old

[root@fedora ~]#

Start squid with new cache.

9.  Create squid cache directory (Rebuild squid cache).

[root@fedora ~]# squid -z

2009/06/08 07:16:32| Creating Swap Directories

2009/06/08 07:16:32| /var/spool/squid exists

2009/06/08 07:16:32| Making directories in /var/spool/squid/00

2009/06/08 07:16:32| Making directories in /var/spool/squid/01

2009/06/08 07:16:32| Making directories in /var/spool/squid/02

2009/06/08 07:16:32| Making directories in /var/spool/squid/03

2009/06/08 07:16:32| Making directories in /var/spool/squid/04

2009/06/08 07:16:32| Making directories in /var/spool/squid/05

2009/06/08 07:16:32| Making directories in /var/spool/squid/06

2009/06/08 07:16:32| Making directories in /var/spool/squid/07

2009/06/08 07:16:32| Making directories in /var/spool/squid/08

2009/06/08 07:16:32| Making directories in /var/spool/squid/09

2009/06/08 07:16:32| Making directories in /var/spool/squid/0A

2009/06/08 07:16:32| Making directories in /var/spool/squid/0B

2009/06/08 07:16:32| Making directories in /var/spool/squid/0C

2009/06/08 07:16:32| Making directories in /var/spool/squid/0D

2009/06/08 07:16:32| Making directories in /var/spool/squid/0E

2009/06/08 07:16:32| Making directories in /var/spool/squid/0F

[root@fedora ~]#

10.  View squid cache directory contents to verify the cache file exist.

[root@fedora ~]# ls /var/spool/squid/

00  02  04  06  08  0A  0C  0E  squid_cache_old

01  03  05  07  09  0B  0D  0F

[root@fedora ~]#

11.  Start squid with new clean cache, and then verify squid proxy server is up and running.

[root@fedora ~]# service squid start

Starting squid: .                                          [  OK  ]

[root@fedora ~]#

[root@fedora ~]# service squid status

squid (pid  9202) is running...

[root@fedora ~]#

Remove squid cache.

Then remove old squid cache, this part should be done after you start the squid proxy server with new clean cache file.  This part may take a while base on the size of squid cache directory.  Please Note:- If you follow this article correctly, total downtime of your squid proxy server may be under 1 minutes because we already start squid proxy server with clean cache and after that we remove old squid cache file that may take lot of overall time to complete the procedure.

12.  Remove squid cache in the /var/spool/squid/squid_cache_old directory. Do this step with caution... 

[root@fedora ~]# rm -rf /var/spool/squid/squid_cache_old/

[root@fedora ~]#