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linux server status monitoring simple script

Aneesh — Fri, 17 Dec 2010 04:46:50 +0000

Create the following scripts in a file and call the file in crontab at desired intervals

echo “……………………. SERVER MONITORING REPORT ……………………..” > /scripts/report.txt
echo “APACHE SERVER:-” >> /scripts/report.txt
/sbin/service httpd status >> /scripts/report.txt
echo “MYSQL SERVER:-” >> /scripts/report.txt
/sbin/service mysqld status >> /scripts/report.txt
echo “SSH/SFTP:-” >> /scripts/report.txt
/sbin/service sshd status >> /scripts/report.txt
echo “SENDMAIL:-” >> /scripts/report.txt
/etc/init.d/sendmail status >> /scripts/report.txt
echo “…………………………………………………………..” >> /scripts/report.txt

echo “…………………….DISK SPACE …………………..” >> /scripts/report.txt
echo “…………………………………………………………..” >> /scripts/report.txt
df -h >> /scripts/report.txt
echo “…………………………………………………………………….” >> /scripts/report.txt
echo “…………………………………………………………………….” >> /scripts/report.txt
echo “SYSTEM LOAD AVERAGE” >> /scripts/report.txt
top -bn1 | grep -3 “load average” >> /scripts/report.txt
echo “…………………………………………………………………….” >> /scripts/report.txt
#top -n1 >> /scripts/report.txt
echo “…………………………………………………………………….” >> /scripts/report.txt
echo “Report generated on $(date)” >> /scripts/report.txt
echo “……………………. END OF REPORT ……………………..” >> /scripts/report.txt

mail -s “Server Stats on $(date)” aneesh@hellosystemadmin.com < /scripts/report.txt

install mod ssl on apache

Aneesh — Wed, 19 May 2010 06:15:32 +0000

I am going to give you the steps to install mod_ssl on an Apache server by compiling the source.

Download the following packages

1. apache_1.3.14.tar.gz http://www.apache.org

2. openssl-0.9.6.tar.gz http://www.openssl.org

3. mod_ssl-2.7.1-1.3.14.tar.gz http://www.modssl.org

I have created a folder called /downloads/src and downloaded all packages here

Go to Apache source files and compile it as shown below

# ./configure –enable-module=so –enable-module=ssl –enable-module=mod_rewrite

Youc an add whatever module you needed

Now go to openssl folder and compile and install ( you can do this same by using yum or apt-get command)

To compile and install OpenSSL do the following commands

# sh config -fPIC
# make
# make install

At this time you can compile your PHP also. To do that run following commands

# ./configure –with-apache=../apache_1.3.41 –with-gd –with-zlib-dir –with-jpeg-dir –with-png-dir –with-freetype-dir –enable-gd-native-ttf –with-freetype-dir=/usr/lib/ –with-ttf –with-mysql=/usr/local/mysql –with-curl –disable-soap –with-openssl –with-xmlrpc –enable-ftp –with-xsl –with-mysqli=/usr/local/mysql/bin/mysql_config

# make

# make install

Compile Apache and install

Go to the apache Directory and runn following commands

# ./config.status
# make
# make certificate ( This step will be asked some inputs from you for your self signed SSL certificate)
# $ make install

Now you have installed the apache server with a self signed SSL certificate. Now it is the time to add the location of the .CRT file and .KEY file in your apache configuration file. From the above steps you can see the location of these files. Copy those paths.

Now open your httpd.conf file and add the following line

Listen 443

Now create a virtual directory which will listen the port 443

ServerName www.example.com
SSLEngine on
SSLCertificateFile /usr/local/apache/conf/ssl.crt/server.crt
SSLCertificateKeyFile /usr/local/apache/conf/ssl.key/server.key

Now save the file and restart your Apache server

# apachectl stop

# apachectl startssl

Enjoy

Job Vacancy Head System for Vectorshades

Aneesh — Wed, 14 Apr 2010 04:53:40 +0000

Job Profile : Head – Systems. — Contact at 9895527145 for applying

Salary is negotiable and could be anywhere around 30k

EDUCATION

• MBA–IT / • Post Graduate Diploma in System Development (PGDSD) ,

CAREER SKILLS
• MIS Solution Development / MIS Reporting skills
• Software Development (PHP/ASP/MYSQL/MSSQL) & Technical Support
• Systems Management
• Inventory control Systems
• Costing and negotiation skills
• Financial / Accounting knowledge
• Strong Programming / Networking / Management Concepts.
• Proficient in Data base concepts and Data Warehousing.
TECHNICAL SKILLS
• Windows NT/2000/2003, Linux (Ubuntu)
• MS SQL Server 7.0/2000/2005, MySQL, MS Access
• ASP.NET # VB, ASP, PHP, VB 6, HTML, DHTML, Java script, MSSQL, MYSQL
• MSOffice, Open Office, Outlook, FTP Applications, Adobe Photoshop, Dream viewer and Search engine optimization etc.
• Strong networking concepts on LAN, WAN, VPN Setups.
• Strong data warehousing and MIS skills.

configure perl in apache

Aneesh — Fri, 19 Mar 2010 12:14:08 +0000

In order to browse perl files (.pl) through apache serer you need to add few lines in apache configuration file ( httpd.conf)

Add the following in httpd.conf

AddHandler cgi-script .cgi .pl

Now find the following section

Options FollowSymLinks
AllowOverride None

Add +ExecCGI to the options list. So it looks like as follows now

Now find the following section

Options FollowSymLinks +ExecCGI
AllowOverride None

Now save httpd.conf and restart Apache server

Create a sample perl file called test.pl and add the following lines and save it.

#!/usr/bin/perl
print “content-type: text/html \n\n”;
print “Hello, Perl!”;

Now browse the page

Find PID of a PHP script

Aneesh — Wed, 02 Dec 2009 06:08:06 +0000

I have been trying to find the PID of a php site which is hosted in my apache web server. I did not know that it was very easy until in found the built in php function getmypid(). To find the process ID (PID) of a PHP scriptÂ use the following code in your php file

echo getmypid ();

change php.ini values using htaccess

Aneesh — Wed, 25 Nov 2009 05:12:48 +0000

Using php_flag we can change php.ini values through an .htaccess file. For example if we need to change the php value of register_globals to Off we can do it using the following .htaccess

php_flag register_globals off

Install Apache, Mysql, PHP in Linux Server

Aneesh — Mon, 09 Nov 2009 06:29:50 +0000

Installing Apache

[root@server ~]# wget http://opensource.become.com/apache/httpd/apache_1.3.41.tar.gz
[root@server ~]# tar zxvf apache_1.3.41.tar.gz
[root@server ~]# cd apache_1.3.41
[root@server ~]# ./configure –prefix=/usr/local/apache –enable-module=so
[root@server ~]# make
[root@server ~]# make install

Now we have installed apache . Let’s start the apache by the following command

[root@server ~]# /usr/local/apache/bin/apachectl start

Installing Mysql

[root@server ~]# wget http://mysql.llarian.net/Downloads/MySQL-5.1/mysql-5.1.40-linux-i686-glibc23.tar.gz
[root@server ~]# tar zxvf mysql-5.1.40-linux-i686-glibc23.tar.gz
[root@server ~]# mv mysql-5.1.40* mysql
[root@server ~]# mv mysql /usr/local/ mysql
[root@server ~]# cd mysql
[root@server ~]# chown -R mysql .
[root@server ~]‚ chgrp -R mysql .
[root@server ~]# scripts/mysql_install_db –user=mysql
[root@server ~]# chown -R root .
[root@server ~]# chown -R mysql data

Now we can start mysql by the following command
[root@server ~]# bin/mysqld_safe –user=mysql &
Note: Now mysql has not password. To set root password run the following command
[root@server ~]# bin/mysqladmin -uroot -password ‘NEWPASSWORD’

To Stop mysql server , do the follwing command

[root@server ~]# bin/mysqladmin -uroot -p shutdown

Installing PHP

[root@server ~]# wget http://in.php.net/distributions/php-5.3.0.tar.gz
[root@server ~]# tar zxvf php-5.3.0.tar.gz
[root@server ~]# cd php-5.3.0
[root@server ~]# ./configure –with-apxs=/usr/local/apache/bin/apxs –with-gd –with-zlib-dir –with-jpeg-dir –with-png-dir –with-freetype-dir –enable-gd-native-ttf –with-freetype2-dir –with-ttf –with-mysql=/usr/local/mysql –with-mysqli=/usr/bin/mysql_config –with-curl –disable-soap –with-openssl –with-xmlrpc –enable-ftp –with-xsl

********if configure error do install the following pakages******

yum install flex
yum install libxml2 libxml2-dev
yum install ‘openssl*’
yum install openssl
yum install libopenssl*
yum install openssl*
yum install libjpeg*
yum install libpng*
yum install libfreetype*
yum install libxslt-dev
if Package libxslt-dev has no installation candidate then
yum install libxslt1-dev

***************

[root@server ~]# make
[root@server ~]# make install

Now we have installed php. We need to‚ load php in apache configuration file. To do it add the following line in /usr/local/apache/conf/httpd.conf

AddType application/x-httpd-php .php .php3 .wml .html