How to search text in Ubuntu Linux

Posted on April 21, 2020 by Gkhan

How to search text in Ubuntu Linux

1- Install ack-grep by typing
#sudo apt-get install ack-grep

2- Change to the directory where you want to search
# ack-grep yourtext

it will show all files containing text  yourtext

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Cisco 7960 SIP Phone India Time Setting

Posted on April 15, 2020 by Gkhan

Cisco 7960 SIP Phone Time India Time Setting

My Phone was showing One  hour ahead in IST time . I configured below setting in SIPDefault.cnf.

It was showing one hour ahead due to  dst_auto_adjust:  was enabled. I just disabled its worked fine.

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How to record linux ssh terminal output and replay it for all users

Posted on April 12, 2020 by Gkhan

How to record linux ssh terminal output and replay it for all users

we can get it done using script command .you can save all the session from all users login in to your server and there activity. this will help you to troubleshoot the issues .

1-  edit the profile file ( /etc/profile )and insert the below code.

……………………………………………………
if [ "x$SESSION_RECORD" = "x" ]
then
timestamp=$(date +%d-%m-%Y-%T)
session_log=/var/log/session/session.$USER.$$.$timestamp
SESSION_RECORD=started
export SESSION_RECORD
script -t -f -q 2>${session_log}.timing $session_log
exit
fi
……………………………………………………
2- create a directory to record session

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How to install OpenVPN server on Centos 7

Posted on April 12, 2020 by Gkhan

How to install OpenVPN server on Centos 7

1- Install Centos 7 64 bit minimal install

2- Update the Centos 7

# yum update -y

3- Install EPEL repositories

cd /tmp wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm ls *.rpm

yum install epel-release-latest-7.noarch.rpm
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How to install bigbluebutton web conference server.

Posted on April 12, 2020 by Gkhan

How to install BigBlueButton web conference server.

The minimum requirements for a BigBlueButton server are

  • Ubuntu 16.04 64-bit OS running Linux kernel 4.x
  • 8 GB of memory with swap enabled (16 GB of memory is better)
  • 4 CPU cores (8 is better)
  • TCP ports 80 and 443 are accessible
  • UDP ports 16384 – 32768 are accessible
  • Port 80 is not in use by another application

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How to install Cisco Configuration Professional on windows 10 64 Bit

Posted on February 16, 2020 by Gkhan

How to install Cisco Configuration Professional on windows 10 64 Bit

Cisco Configuration Professional required Java to run and and security setting in Java .

1- Download and install Java updated version.

2- Allow Cisco Configuration Professional in Java Security setting.

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How to install ISSABEL PBX by USB flash drive

Posted on November 17, 2019 by Gkhan

How to install ISSABEL PBX by USB flash drive

1- Download ISSABEL  ISO from  https://www.issabel.org/latest-iso

2- Download  RUFS  utility  https://rufus.ie/

3- Convert ISO to USB  and choose  Write in DD Inamge mode

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How to configure GoIP GSM SIP VOIP Gateway with ISSABEL PBX

Posted on November 17, 2019 by Gkhan

How to configure GoIP GSM SIP VOIP Gateway with ISSABEL PBX

1- Login in to GoIP

GoIP default IP address is  192.168.8.1    default user name is admin password is admin .

Step 1-   Create trunk in the ISSABEL PBX  to configure GoIP

  1. PBX Configuration >  Basic > Trunks > Add Trunk > Add SIP Trunk.

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Backup and Restore your Centos

Posted on March 16, 2019 by Gkhan

Backup and Restore your Centos 7

Some time you want to take backup of your server including application and settings .below are the easy method a small example

1- The first step is to create a location to store the backup. For this article we’re going to store the backup on the same hard drive as the installed operating system

2-Make a backup directory where you will keep backup file.

mkdir /backup

3- Now we will create a compressed version of the Operating System in one single file (tarball) using the tar command.

tar cvpzf /backup/backup.tgz --exclude=/proc --exclude=/lost+found --exclude=/backups --exclude=/dev --exclude=/sys --exclude=/boot/grub --exclude=/boot/grub2 --exclude=/etc/fstab --exclude=/etc/sysconfig/network-scripts/ --exclude=/etc/udev/rules.d/70-persistent-net.rules  /

Now transfer your backup.tgz file to new server .In order to restore your server from the previously created tarball the server must have the same Operating System version loaded on it.

To Restore your backup use the following.

tar xvpfz /backups/backup.tgz -C /

 

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