Run Apache virtual host with its own user and group ID’s

by Siru // August 23, 2011 // No Comments

If you want to run apache virtual host with its own user and group privileges. This module will make apache to access web contents with webcontent’s owner privileges. To do that you need mpm-itk module. You can download mpm-itk module from http://repo.webtatic.com/yum/centos/5/x86_64

#wget http://repo.webtatic.com/yum/centos/5/x86_64/httpd-itk-2.2.19-1.w5.x86_64.rpm

Install itk module in the server

#rpm -ivh httpd-itk-2.2.19-1.w5.x86_64.rpm

After installing stop apache service

#/etc/init.d/httpd stop

Then add the following line in /etc/sysconfig/httpd

HTTPD=/usr/sbin/httpd.itk

Then edit httpd.conf file and make changes to the domain’s Virtual host
entry as below

    ServerName example.com
    DocumentRoot /path/to/web/root

    AssignUserId username groupname

After adding start apache services

#/etc/init.d/httpd start

then change ownership of the web path by following command

#chown username:groupname /path/to/webroot
#chmod 710 /path/to/webroot

ls -al /path/to/webroot
drwx--x--- /path/to/webroot

That is it. Now apache will access your website contents with your own username and group name.

Reference: http://www.webtatic.com/packages/httpd-itk/

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Cannot find autoconf. Please check your autoconf installation

by Siru // August 11, 2011 // No Comments

Hi,

Are you trying to install php modules like pdo and getting the following error.?.

pecl install pdo
WARNING: "pecl/PDO" is deprecated in favor of "channel://http://svn.php.net/viewvc/php/php-src/trunk/ext/pdo//ext/PDO"
WARNING: channel "pecl.php.net" has updated its protocols, use "channel-update pecl.php.net" to update
downloading PDO-1.0.3.tgz ...
Starting to download PDO-1.0.3.tgz (52,613 bytes)
.............done: 52,613 bytes
12 source files, building
running: phpize
Configuring for:
PHP Api Version:         20041225
Zend Module Api No:      20060613
Zend Extension Api No:   220060519
Cannot find autoconf. Please check your autoconf installation and the $PHP_AUTOCONF
environment variable is set correctly and then rerun this script.

ERROR: `phpize' failed

then you can fix it by

# cd /usr/src
# wget http://ftp.gnu.org/gnu/m4/m4-1.4.9.tar.gz
# tar -zvxf m4-1.4.9.tar.gz
# cd m4-1.4.9/
# ./configure && make && make install
# cd ../
# wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.62.tar.gz
# tar -zvxf autoconf-2.62.tar.gz
# cd autoconf-2.62/
# ./configure && make && make install

Then you can install pdo and pdo_mysql without any issues.

Source: http://www.spiration.co.uk/post/1385/Cannot-find-autoconf.-Please-check-your-autoconf-installation
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remove ubuntu from boot menu windows 7

by Siru // July 17, 2011 // No Comments

Hi,

Is your computer still showing Ubuntu from boot menu even after uninstalling it.?. You can follow the below steps in your windows 7 so that it fix the issue.

– Click start
– Type: cmd
– Right-click cmd when it appears under Programs
– Click Run As Administrator

Once the prompt is up type bcdedit.exe
this will list all of the OS that start up in Windows Boot Manager

Once you have this list you use the command bcdedit.exe/delete file name corresponding to ubuntu boot record. The boot record may have path something like \ubuntu\winboot\wubuildr.mbr.
example: bcdedit.exe/delete {802d5e32-0784-11da-bd33-000476eba25f}

This will remove ubuntu’s menu from windows boot.

Source: http://answers.yahoo.com/question/index?qid=20100108062345AAXcdDi

shell script to backup mysql databases

by Siru // July 7, 2011 // No Comments

Hi,

The following shell script will backup all the individual databases present in your server in .sql format and store it under /mysqlbackup folder. Make sure you have mysql databases in /var/lib/mysql and a folder with name /mysqlbackup. Set a cron to run this script once a day.

#!/bin/bash
#Script for mysql database backup
cd /var/lib/mysql
for DBs in $(ls -d */ |tr -d /)
do

cd /mysqlbackup

`mysqldump -u root -p'password' $DBs > $DBs.sql`

done

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delivery temporarily suspended connection timed out postfix

by Siru // July 5, 2011 // No Comments

Hi,

If your mails are not delivering and you getting the following error then probably your firewall is blocking your relay host. You need to allow it.

before-remote[4463]: check handlers for addr: xxxx@yahoo.com
postfix/smtp[4462]: 4099BBE815D: to=, relay=127.0.0.1[127.0.0.1], delay=0, status=sent (250 Ok: queued as 52B31BE815E)
postfix/qmgr[32070]: 52B31BE815E: to=, relay=none, delay=0, status=deferred (delivery temporarily suspended: connect to d.mx.mail.yahoo.com[209.191.88.254]: Connection timed out)

Solution:

======

#/sbin/iptables -A INPUT -s 127.0.0.1 -j ACCEPT

This should fix the problem if not provide the following command also

#/sbin/iptables -A INPUT -d 127.0.0.1 -j ACCEPT

#/etc/init.d/iptables restart

Reference: http://forum.parallels.com/showthread.php?t=110411

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linux user login monitor script

by Siru // June 29, 2011 // 1 Comment

Hi,

Do you want an email alert if someone access your server.?. then you can follow the steps and execute the following script.

Create a file say file.txt and add the following contents to it.

#vi file.txt

echo 'ALERT - User `whoami` Shell Access on:' `date` `who` | mail -s "Alert: `whoami` Access from `who | awk '{print $6}'`" user@yourdomain.com

then execute the following script to make the file.txt contents to be copied to all user’s .bash_profile file.

#!/bin/bash
for file in $(find / -name .bash_profile)

do echo `cat file.txt` >> $file done

then add the line "echo 'ALERT - User `whoami` Shell Access on:' `date` `who` | mail -s "Alert: `whoami` Access from `who | awk '{print $6}'`" user@yourdomain.com" to "/etc/skel/.bash_profile" this will automatically add the above line to all the new user's .bash_profile file.

That’s it you will be noted through mail if someone logins to your server.

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Failed to retrieve directory listing filezilla

by Siru // June 27, 2011 // No Comments

Hi,

If you are receiving the following FTP error while connecting to the server then probably your server is missing the kernel module“ip_conntrack_ftp” and you need to install it.

Status:	Connecting to xx.xx.xx.xx:21...

Status:	Connection established, waiting for welcome message...

Response:	220 ProFTPD 1.3.3c Server (ProFTPD) [xx.xx.xx.xx]

Command:	USER user

Response:	331 Password required for userCommand:

PASS ********Response:	230 User user logged in

Command:	SYSTResponse:	215 UNIX Type: L8

Command:	FEATResponse:	211-Features:

Response:	 MDTM

Response:	 MFMT

Response:	 TVFS

Response:	 MFF modify;UNIX.group;UNIX.mode;

Response:	 MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*;

Response:	 REST STREAM

Response:	 SIZE

Response:	211 EndStatus:	Connected

Status:	Retrieving directory listing...

Command:	PWDResponse:	257 "/" is the current directory

Command:	TYPE IResponse:	200 Type set to I

Command:	PASVResponse:	227 Entering Passive Mode (xx,xx,xx,xxx,xxx,xxx).

Command:	MLSD

Error:	Connection timed out

Error:	Failed to retrieve directory listing

Steps to install “ip_conntrack_ftp”

#modprobe ip_conntrack_ftp

and add this module in

/etc/sysconfig/iptables-config

IPTABLES_MODULES="ip_conntrack_ftp"

#/etc/init.d/iptabes restart

Thats it, you can go for a tea.!.. 🙂

file size limit exceeded php

by Siru // June 14, 2011 // No Comments

Hi.

If you get the following error while executing an php file.

[user@linux]#php index.php

Output

file size limit exceeded

Then probably you will have a php file with size more than 2GB inside that folder, the maximum file size of a php file that can be executed should be 2GB. You need to empty/move that file to a different folder or code that file so that its size comes under 2GB.

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shell script to delete /tmp files linux leaving eacclarator folder

by Siru // April 10, 2011 // No Comments

Hi,

You can use this script to delete tmp files if the /tmp partition memory goes beyond 70 percent by leaving eacclarator folder alone,

#/bin/bash

#Script to delete tmp files except eacclarator s=df -h |grep tmp | cut -d. -f1 if [ $s -gt 70 ]; then if [ `ls /tmp |grep eacclarator |wc -l` -gt 0 ]; # will delete under eacclarator folder then rm -rf /tmp/eacclarator/* /etc/init.d/httpd restart #to make eacclarator to recreate its default folders. exit fi rm -f /tmp/* exit fi

script to notify high server load | linux script for monitoring server

by Siru // April 10, 2011 // No Comments

Hi,

The following is the script which will send mail to admin if the server’s load is more than 15, please enable cron to execute it frequently.

#!/bin/bash SUBJECT="`hostname`server load is high" TO=admin@yourdomain.com uptime > /tmp/load if [ `uptime | awk '{ print$11 }' | cut -d. -f1` -gt 15 ]; then mail -s "$SUBJECT" $TO < /tmp/load exit fi

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Run Apache virtual host with its own user and group ID’s

Cannot find autoconf. Please check your autoconf installation

remove ubuntu from boot menu windows 7

shell script to backup mysql databases

delivery temporarily suspended connection timed out postfix

Failed to retrieve directory listing filezilla

file size limit exceeded php

shell script to delete /tmp files linux leaving eacclarator folder

script to notify high server load | linux script for monitoring server