Server Administration

Thursday, October 30, 2014

How to find a text string inside a file in linux

goto the folder in which you are searching file

find . -type f | xargs grep -l "localhost"

localhost is the text i want to search inside the files.

Tuesday, September 30, 2014

lynx: Can’t access startfile http://localhost/whm-server-status cPanel

If you are getting the error below while running the command service httpd status in a Cpanel server follow the steps below to resolve it.

========
Looking up localhost
Making HTTP connection to localhost
Alert!: Unable to connect to remote host.
lynx: Can't access startfile http://localhost/whm-server-status
========

There can be multiple reasons behind this error it could issue with a modsec rule causing error or anything else, Follow the steps below it will point you to the exact issue with the httpd(Apache).

SSH server as root user

Run the command below

httpd -e DEBUG

Now proceed with the troubleshooting as per the debug report.

Monday, September 22, 2014

how to install openfire chat server 3.9.3 with external mysql database in ubuntu

Openfire (previously known as Wildfire, and Jive Messenger) is an instant messaging (IM) and groupchat server that uses XMPP server written in Java and licensed under the Apache License 2.0

To install Openfire with embeded database Refer link.

Follow the steps below to install Open Fire 3.9.3 with embedded databases in Ubuntu.

Step 1. Update your server

SSH your server as root user or use sudo
sudo apt-get update
sudo apt-get upgrade

Step 2. Install latest version of Oracle JRE/JDK.

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update

Step 3. If you are already using OpenJDK, remove it to minimize any Java conflicts.

sudo apt-get remove --purge openjdk*

Step 4. Then install Oracle Java 7 version.

sudo apt-get install oracle-java7-installer

Step 5. Install MySql Database server

sudo apt-get install mysql-server
sudo mysql -u root -p
mysql> CREATE DATABASE dbopenfire CHARACTER SET='utf8';
mysql> CREATE USER 'openfire'@'localhost' IDENTIFIED BY 'openfirepwd';
mysql> GRANT ALL PRIVILEGES ON dbopenfire.* TO openfire@localhost WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;
mysql> quit

Step 6. Download and Install openfire 3.9.3

cd /tmp
wget http://download.igniterealtime.org/openfire/openfire_3.9.3_all.deb
dpkg -i openfire_3.9.3_all.deb

if you are facing any issue in wget download the deb package from the link

Ignore all installation errors regarding user and folder permissions.it cause depending on your version of JRE/JDK.

vi /etc/init/d/openfire

If there is no such file created the move to the next step else you need to edit file and replace java-6-sun with java-6-oracle or java-7-oracle .

Replace java-6-sun with java-6-oracle or java-7-oracle
sudo apt-get install rpl
sudo rpl '6-sun' '7-oracle' /etc/init.d/openfire
sudo service openfire start

Step 7. Allow ports for Openfire as they are used.

sudo ufw allow 9090/tcp
sudo ufw allow 9091/tcp
sudo ufw allow 5222/tcp
sudo ufw allow 7777/tcp
sudo ufw allow 7443/tcp
sudo ufw allow 7070/tcp
sudo ufw allow 3478/tcp
sudo ufw allow 3479/tcp

Friday, August 22, 2014

openmeetings exception: java.lang.Exception: Path to JOD Library folder does not exist openmeetings not able to upload document

If you are getting any such error as below while uploading any document like doc, docx, odp, xls, xlsx, ppt, pptx follow the steps below to resolve it.

===============================
key: processSWF
process: generateSwf
command: /usr/share/pdf2swf -s insertstop -s poly2bitmap -i -j 85 -s zoom=100 /usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/7de20358e15fc70c1bb2a34b393e6333.pdf /usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/7de20358e15fc70c1bb2a34b393e6333.swf
exception: java.io.IOException: Cannot run program "/usr/share/pdf2swf": java.io.IOException: error=2, No such file or directory
error: Cannot run program "/usr/share/pdf2swf": java.io.IOException: error=2, No such file or directory
exitValue: java.io.IOException: Cannot run program "/usr/share/pdf2swf": java.io.IOException: error=2, No such file or directory
out:
key: processThumb
process: generateBatchThumbByWidth
command: /usr/bin/convert -thumbnail 80 /usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/7de20358e15fc70c1bb2a34b393e6333.pdf /usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/_thumb_page-%04d.jpg
exception: null
error: convert: unable to open image `/usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/7de20358e15fc70c1bb2a34b393e6333.pdf': No such file or directory.
convert: missing an image filename `/usr/src/openmeetings/webapps/openmeetings/upload/files/7de20358e15fc70c1bb2a34b393e6333/_thumb_page-%04d.jpg'.
key: processOpenOffice
process: doJodConvert
command: null
exception: java.lang.Exception: Path to JOD Library folder does not exist
error: Path to JOD Library folder does not exist
exitValue: java.lang.Exception: Path to JOD Library folder does not exist
out: null
===============================

To import doc, docx, odp, xls, xlsx, ppt, pptx, all files that you can open with OpenOffice to OpenMeetings and use them in the whiteboard you need OpenOffice or LibreOffice installed the machine that runs OpenMeetings.

Installation of JODConverter means: You have download the ZIP binary from their website and then configure in Apache OpenMeetings Administration > Configuration the config key jod.path to point to the "lib" directory of the unpacked JODConverter binary. There is no restart of OpenMeetings required.

SSH server as root user
cd /usr/share
you can download the jodconverter zip file from the link
wget http://jodconverter.googlecode.com/files/jodconverter-core-3.0-beta-4-dist.zip
unzip jodconverter-core-3.0-beta-4-dist.zip

In the unzip files find the library file or simply lib directory and set the path of jod.path to point to that lib directory and save, Location of lib could be /usr/share/jodconverter-core-3.0-beta-4/lib

my configurations were as below.

jod.path /usr/share/jodconverter-core-3.0-beta-4/lib

Friday, August 15, 2014

How to install RMS (Ray Media Server) on centos redhat fedora

To install Ray Media server follow the seps below.

Step 1) Install java if you don't have.

yum install java-1.7.0-openjdk

Step 2) Install RMS

cd /opt
mkdir ray_server
cd ray_server/
wget http://get.boonex.com/RMS-LINUX-v.7.1.0
tar xzvf RMS-LINUX-v.7.1.0

Step 3) Configure RMS

1). access.dat – mention all domain names which will be allowed to access RMS. Every domain name should be written on a separate line and should not contain "http://" and "www", just yourdomain.com;

cd /opt/ray_server/RMS_7.1.0
vi access.dat

2). open file red5.sh – set the value for JAVA_HOME variable, It should be the path to the folder where JRE is installed, In my case it was below.

vi red5.sh
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65/

3). Goto file run_daemon.sh set the value for RAY_SERVER_PATH variable, It should be the path to the RMS folder on your server.

vi run_daemon.sh
RAY_SERVER_PATH=/opt/ray_server/RMS_7.1.0/

4). We need to make entries of webapp.virtualHosts for chat, board, global, im, We need to mention the server IP there.

***For board

cd /opt/ray_server/RMS_7.1.0/webapps/board/WEB-INF
vi red5-web.properties
Make the entry of server IP like below.
webapp.virtualHosts=0.0.0.0 webapp.virtualHosts=122.122.122.122
Note 122.122.122.122 is the server IP.

***For chat

cd /opt/ray_server/RMS_7.1.0/webapps/chat/WEB-INF
vi red5-web.properties
Make the entry of server IP like below as we did for board.
webapp.virtualHosts=0.0.0.0 webapp.virtualHosts=122.122.122.122

***For global

cd /opt/ray_server/RMS_7.1.0/webapps/global/WEB-INF
vi red5-web.properties
Make the entry of server IP like below as we did for board.
webapp.virtualHosts=0.0.0.0 webapp.virtualHosts=122.122.122.122

***For im

cd /opt/ray_server/RMS_7.1.0/webapps/im/WEB-INF
vi red5-web.properties
Make the entry of server IP like below as we did for board.
webapp.virtualHosts=0.0.0.0 webapp.virtualHosts=122.122.122.122

Step 4) Add the below following lines in /etc/rc.local file, So when server reboots RMS is started automatically.

vi /etc/rc.local

========

cd /opt/ray_server/RMS_7.1.0
./run_daemon.sh &
========

Step 5) Now we can rum the RMS.

cd /opt/ray_server/RMS_7.1.0
chmod 755 run_daemon.sh
./run_daemon.sh &

Installing RMS also installs the Red5 server, which can be tested at http://server_ip:5080
RMS Address: server_main_IP
RMS Port: 1935
RMS HTTP Port: 5080

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