Linux Administration

Benchmarking with Frameworks.

2012-01-11T01:08:00.000-08:00

Framework for Development. Ruby: 1.Ruby on Rails is on the TOP. PHP: 2.FuelPHP fuelphp.com for the perfect mixture of CI, Kohana, Rails and others. If you check following URL: http://ilikekillnerds.com/2011/04/codeigniter-vs-fuelphp http://www.reddit.com/r/webdev/comments/fmy6i/why_is_fuelphp_better_than_codeigniter/ http://www.beyondcoding.com/2008/05/26/

SMTP check script in ruby.

2012-01-03T03:51:00.000-08:00

Create ruby script to check SMTP with login credential. You can test two authentication in this script i.e. plain and login. vi /opt/rubymailtest.rb require 'net/smtp' message = < From: info@homework.do To: sbtoalerts@gmail.com Subject: test message Date: Sat, 23 Jun 2001 16:26:43 +0900 This is a test message. END_OF_MESSAGE #Net::SMTP.start('mail.exmaple.com') do |smtp| #

Remove extra spaces from file in linux.

2011-10-11T03:10:00.000-07:00

If you found spaces and non-ASCII characters with in files, remove all from a file in place. Solution is: perl -i.bak -pe 's/[^[:ascii:]]//g' filename Thanks-

My New Writeup.

2011-09-28T23:16:00.000-07:00

I am not good writer, still i am writing things which is need to me and people who find needful for them. This is my another Tech Blog. I hope its useful for all of us. Please visit: http://linux-fundamentals.blogspot.com/ Thanks-

Shell Script To Monitor Mysql.

2011-09-27T22:36:00.000-07:00

[root@ 17_johnson]# cat /usr/bin/monitor-mysql #!/bin/bash # mysql root/admin username MUSER="root" # mysql admin/root password MPASS="im#secure" # mysql server hostname MHOST="localhost" #Shell script to start MySQL server i.e. path to MySQL daemon start/stop script. # Debain uses following script, need to setup this according to your UNIX/Linux/BSD OS. MSTART="/etc/init.d/mysqld start" # Email

Script To Check Disk Usage and Send Alert URGENT/WARNING.

2011-09-24T22:31:00.000-07:00

[root@ 17_johnson]# cat /usr/bin/DiskUsage #!/bin/bash #filesystems="/dev/sda1 /dev/sda2 /dev/sda5" filesystems="/data /log /app /backup /home /" for fs in $filesystems do size=`df -k $fs |grep $fs |awk '{ print $3 }'` if [ $size -le 2500000 ] ;then # mail -b "URGENT: Low disk space for $fs ($size)" echo "$fs ($size) URGENT" | mail -s "Alert: Disk Usage

Shell script to taking MySql Dump/Backup.

2011-09-23T22:29:00.000-07:00

[root@17_johnson]# cat /usr/bin/mybackupsql #!/bin/bash # USER VARIABLES TIMESTAMP=$(date +%Y-%m-%d) MYSQLUSER=root MYSQLPWD=im#secure MYSQLHOST=localhost # PATH VARIABLES MK=/bin/mkdir GREP=/bin/grep MYSQL=/usr/bin/mysql MYSQLDUMP=/usr/bin/mysqldump # CREATE MYSQL BACKUP # Create new backup dir $MK /backup/mysqlback_$TIMESTAMP #Dump new files for i in $(echo 'SHOW DATABASES;' | $MYSQL -u$

MysqlDump with Exclude database or perticuler table Options.

2011-09-22T22:26:00.000-07:00

[root@linux_johnson]# cat /usr/bin/imdbbackup #!/bin/bash # USER VARIABLES TIMESTAMP=$(date +%Y-%m-%d) MYSQLUSER=root MYSQLPWD=im#secure MYSQLHOST=localhost # PATH VARIABLES MK=/bin/mkdir GREP=/bin/grep MYSQL=/usr/bin/mysql MYSQLDUMP=/usr/bin/mysqldump # CREATE MYSQL BACKUP # Create new backup dir $MK /backup/mysqlback_$TIMESTAMP #Dump new files DBname=db_production for i in $(echo 'SHOW

How To Clear Active record base Sessions.

2011-09-21T22:40:00.000-07:00

[root@17_johnson]# cat current/lib/clear_sessions_data.rb require 'rubygems' require 'active_record' ActiveRecord::Base.establish_connection( :adapter => "mysql", :host => "localhost", :username => "root", :password =>"tm#secure", :database => "tm_production", :socket => "/var/lib/mysql/mysql.sock" ) sql = 'DELETE FROM sessions WHERE updated_at < DATE_SUB(NOW(),

To check exact PID of running process in linux.

2011-09-20T23:31:00.000-07:00

To check exact PID of process. Command: ps -efa | grep httpd | grep -v grep | awk '{print $2}' ----------------------------------------------------------------------------------------- #! /bin/bash PROCNAME=$1 PIDS=`ps -efa | grep $PROCNAME | grep -v grep | awk '{ print $2 }'` for ff in $PIDS do echo "$ff" done --------------------------------------------------------------------------------

Last_IO_Error: error connecting to master 'repl@12.18.46.78:3666' - retry-time: 10 retries: 86400

2011-09-13T23:55:00.000-07:00

This error you get when you check " show slave status\G;" Solution as follows: Do Telnet: [root@sj ~]# telnet 12.18.46.78 3666 Trying 12.18.46.78... Connected to 12.18.46.78. Escape character is '^]'. uHost '12.18.46.78' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'Connection closed by foreign host. Do Flush host: [root@sj ~]# mysqladmin -uroot -

start-stop-daemon script for Centos 5.!

2011-08-24T03:44:00.000-07:00

wget http://developer.axis.com/download/distribution/apps-sys-utils-start-stop-daemon-IR1_9_18-2.tar.gz tar -xvf apps-sys-utils-start-stop-daemon-IR1_9_18-2.tar.gz cd apps cd sys-utils/start-stop-daemon-IR1_9_18-2/ cat Makefile --------------------------------------------- # comment this Two line for centos build. #AXIS_USABLE_LIBS = GLIBC UCLIBC #include $(AXIS_TOP_DIR)/tools/build/

Add Branch to Git.

2011-06-20T00:49:00.000-07:00

-------------------------------------------------------- vi /usr/bin/addbranch <---Create the file with name, and copy the following code. #!/bin/bash # git-create-branch if [ $# -ne 1 ]; then echo 1>&2 Usage: $0 branch_name exit 127 fi set branch_name = $1 #git push origin origin:refs/heads/${branch_name} #git fetch origin git checkout --track -b ${branch_name} origin/$

Find Command in Linux With Options.

2011-05-30T02:34:00.000-07:00

If you find root only find /. -size +100M -size n[cwbkMG] File uses n units of space. The following suffixes can be used: ‘b’ for 512-byte blocks (this is the default if no suffix is used) ‘c’ for bytes ‘w’ for two-byte words ‘k’ for Kilobytes (units of 1024 bytes) ‘M’ for Megabytes (units

ERROR 2003 (HY000): Can't connect to MySQL server on '10.677.32.43' (111)

2011-05-23T06:29:00.000-07:00

root@124:/etc# mysql -uroot -priva#secure -h10.677.32.43 ERROR 2003 (HY000): Can't connect to MySQL server on '10.677.32.43' (111) If you go this error. Check your /etc/my.cnf ( for centos), /etc/mysql/my.cnf ( for ubuntu) Comment this two line. #skip-external-locking #bind-address = 127.0.0.1 Restart Mysql. Now you should able to connnect remotely.

Security for Linux Server.

2011-05-03T06:43:00.000-07:00

All the Security for Linux Server. 1. Firewall APF/Iptables * Block the all ports which is unnecessary open on server. * There is Spammer Database will be add IP pool in firewall. 2. Change SSH port 3. Update and scans for rootkits, backdoor and possible local exploits. wrong permissions for /usr/bin and system commands, hidden files, suspicious strings in kernel modules, and

Can't umount on RHEL/CENTOS Error: device is busy

2011-04-20T07:21:00.000-07:00

[root@sandbox1 ~]# umount /dev/sdb1 umount: /mnt/pen: device is busy umount: /mnt/pen: device is busy Solution : [root@sandbox1 ~]# lsof | grep /mnt/pen esd 23711 root cwd DIR 8,17 4096 1228794 /mnt/pen/720p BRRip x264 - HDMiCRO by Mr. KickASS esd 23711 root 3r REG 8,17 942758269 1229005 /mnt/pen/ - HDMiCRO by Mr. KickASS/ Mr. KickASS.mp4 [

/usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: No such file or directory

2011-04-13T00:16:00.000-07:00

While compiling any sources in linux if you got above Error. ---------------------------------------------------- /usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: No such file or directory make[2]: *** [boot.o] Error 1 make[2]: Leaving directory `/mnt/resin-4.0.16/modules/c/src/resin_os' make[1]: *** [plugins] Error 2 make[1]: Leaving directory `/mnt/resin-4.0.16/modules/c/src' make: *** [

postfix/postdrop warning: uid=48: Illegal seek postfix/sendmail: fatal: (48): queue file write error

2011-04-08T00:43:00.000-07:00

If you got the error. And you are not able to send large size/ mail attachment from postfix please do above config. postfix/postdrop warning: uid=48: Illegal seek postfix/sendmail: fatal: (48): queue file write error Edit the postfix mailserver file: vi /etc/postfix/main.cf Change/Add this option to send large file size. message_size_limit = 100000000 mailbox_size_limit = 800000000

[On Ubuntu Mod_proxy added to apache2] BalancerMember Can't find 'byrequests' lb method

2011-04-05T07:13:00.000-07:00

Mod_proxy added to apache2. apt-get install libapache2-mod-proxy-html apt-get install libxml2-dev Add following lines to /etc/apache2/apache2.conf : LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so LoadModule proxy_http_module /usr/lib/apache2/modules/mod_proxy_http.so LoadModule headers_module /usr/lib/apache2/modules/mod_headers.so LoadModule

Compare two file and find diff between two file in sort form.

2011-04-01T04:19:00.001-07:00

Compare two file and find diff between two file in sort form. It will list both file content and diff. sdiff -s File1 File2 It will do Sort and showing complete diff. grep -vf File2 File1

Permission denied: /.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable

2011-03-14T02:23:00.000-07:00

If you got error with passenger +httpd Please check a log and change permission as follows. its just permission issue. ------------------------------------------------------------------------------ tail -f /var/log/httpd/error_log [Mon Mar 14 02:16:36 2011] [crit] [client 125.18.56.179] (13)Permission denied: /home/user/.htaccess pcfg_openfile: unable to check htaccess file, ensure it is

Master-Master Replication

2011-02-21T02:20:00.001-08:00

Master-Master Replication Master1 - 1.1.1.1 Master3 - 2.2.2.2 Master1 Edit /etc/my.cnf #Primary Master server server-id=1 auto_increment_offset=1 # total number of master servers auto_increment_increment=2 # local slave replication options # remote master replication options master-host=2.2.2.2 master-port=3306 master-user=repl master-password=replpass master-connect-retry=10 Master3 #

Production Server/Mailserver Maintanace.

2011-02-15T22:42:00.000-08:00

At first, allocate enough space for log partition. Linux system having default log rotation if you want to change you can do customize log rotation automatically. See here maillog in GB, if no need just clear old log. Log rotate. drwxr-xr-x 2 root root 4.0K Dec 8 2009 mail -rw------- 1 root root 504M Feb 15 00:49 maillog -rw------- 1 root root 1.1G Feb 10 02:37 maillog.1 -rw------

Mysql Won't start (two instance on same server)

2011-02-01T07:16:00.000-08:00

A Solution: Install mysql db again at new location,use following command: /usr/bin/mysqld_safe --defaults-file /etc/my.cnf Restart Mysql: /etc/init.d/mysqld restart /usr/local/bin/mysqld_safe --defaults-file /usr/local/etc/my.cnf mysql_install_db --user=mysql --ldata=/new-data-location mysqld_safe --datadir=/new-data-location --user=mysql & /usr/local/mysql/share/mysql/

/usr/bin/ld: cannot find -lperl collect2: ld returned 1 exit status make: *** [blib/arch/auto/Image/Magick/Magick.so] Error 1

2011-01-24T05:30:00.000-08:00

Normally this error occurs when install ImageMagick on Ubuntu Linux. ------------------------------------------------------------------------------- /usr/bin/ld: cannot find -lperl collect2: ld returned 1 exit status make: *** [blib/arch/auto/Image/Magick/Magick.so] Error 1 --------------------------------------------------------------------------------- And Solution is : Its need this package.

[semaphores] No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed

2011-01-03T03:27:00.000-08:00

Apache haveing issue with.. semaphores many time. Solution as follow to remove semaphores from apache. Command to remove semaphores from apache: ipcs -s | grep apache | perl -e 'while () { @a=split(/\s+/); print `ipcrm sem $a[1]`}' Thanks-

[Exception_notification For RAILS3 ] git://github.com/rails/exception_notification.git (at master) is not checked out. Please run `bundle install` (Bundler::GitError) [RESOLVED]

2010-12-28T01:21:00.000-08:00

[Exception_notification For RAILS3 ] git://github.com/rails/exception_notification.git (at master) is not checked out. Please run `bundle install` (Bundler::GitError) [RESOLVED] # Add to Gemfile gem 'exception_notification', :git => "http://github.com/rails/exception_notification.git", :require => 'exception_notifier' # Add following to config/application.rb or config/initializers/

[Sinatra] `union': can't convert Array into String (TypeError) [Resolved]

2010-12-27T01:18:00.000-08:00

For The Issue Please Do Following Stapes. First uninstall gem Rack with all version. # gem uninstall rack Select gem to uninstall: 1. rack-1.0.0 2. rack-1.0.1 3. rack-1.2.1 4. All versions > 4 Successfully uninstalled rack-1.0.0 Successfully uninstalled rack-1.0.1 You have requested to uninstall the gem: rack-1.2.1 thin-1.2.7 depends on [rack (>= 1.0.0)] sinatra-1.1.2 depends on [

Phusion Passenger Optimization.

2010-10-26T01:13:00.001-07:00

If you faceing same as following issue. Exception NameError in PhusionPassenger::Rack::ApplicationSpawner (uninitialized constant MongoMapper) Please do the settings. It will really help you. Also, check your Database Query and cusumption of Memroy on server. --------------------------------------------- http { .. PassengerMaxPoolSize 3 keepalive_timeout 120; -----------------

[RSOLVED] [Rails Crontab Not Running]`bin_path': can 't find executable rake for Cronjob not running

2010-10-25T01:44:00.000-07:00

Hey Guys, I have issue with some ruby script and rails, rake script not running as cronjob, so you can use the following solution. ============================================= [root@localhost ] vi /usr/bin/railscron #! /bin/bash cd /app/production/current/ PATH=$PATH:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin/ /usr/local/bin/rake user:details RAILS_ENV=

ActionController::RoutingError No route matches .html

2010-10-19T03:59:00.000-07:00

Added extra .html to URL in rails. If you have added following rewiterules in apache configuration Or added in your .htaccess in your public. Basically its required for the FastCGI. if you run fastCGI server then its need, but if you running Passenger should be remove --------------------------------------- RewriteRule ^$ index.html [QSA] RewriteRule ^([^.]+)$ $1.html [QSA] RewriteCond %{

Background Jobs In Rails.

2010-09-28T11:30:00.000-07:00

Well, We all know the Rails Deployment if, not please read my some older post it will really help you for that. Here what i am discussing it is also part of Administration/Deployment. Yes, I am Talking about Background Process. For the Rails application there is way, to run the background task with different ways i.e. as follows. BackgroundDrb Delayed Job Background Job{aka BJ}

[PHP+FPM+NGINX] Installtion/Compilation/Confiuration.

2010-08-23T03:30:00.000-07:00

Its Installtion/Compilation/Confiuration of PHP+FPM+NGINX. Please Follow The Steps One By One, Its Working Configration Tested By Me :0). IF The Any Issue Please Contact Me. wget http://museum.php.net/php5/php-5.2.8.tar.gz tar -xvf php-5.2.8.tar.gz cd php-5.2.8 ========================================= ./configure --enable-fastcgi --enable-fpm --with-mcrypt --with-zlib --enable-mbstring --

How to password protect PHP/Wordpress with htpasswd.

2010-07-21T05:49:00.000-07:00

First Create .htpasswd file. htpasswd -c /opt/app/.htpasswd admin New password: Re-type new password: After that you can add .htaccess in your application. vi /opt/app/.htaccess AuthUserFile /opt/app/.htpasswd AuthGroupFile /dev/null AuthName admin AuthType Basic require valid-user

Server Monitoring with Serverstat

2010-06-30T11:50:00.000-07:00

This is Popular and real time monitoring tool. mostly it used for webhosting server. It is Alarming system too. Please check with this image. i have configure monitoring for some major services. e.g. Httpd-MySql-Ftp, you can add any ports and whatever you wants no limit. So when its stoped or some services down it showing you red signal immediately with sound alarm/alerts. Also it gives you

Check Mysql Master-Slave Replication Script.

2010-06-24T22:17:00.000-07:00

This is Mysql Master-Slave Replication Script which is checking position of log. you can set as cron and run. vi /usr/bin/scriptname #! /bin/bash # # Will Run on LOCAL LAN ON EC2 CLUSTER SLAVE_HOST=1.2.2.1 SLAVE_PASS=passwd SLAVE_USER=root MASTER_PASS=passwd MASTER_USER=root MASTER_HOST=1.2.4.2 master_pos=`/usr/local/mysql/bin/mysql -u$SLAVE_USER -p$SLAVE_PASS -h$SLAVE_HOST -e 'show slave

/usr/libexec/mysqld: Can't change dir to '/data/mysql/' (Errcode: 13) [Resolved]

2010-06-08T00:13:00.000-07:00

If you want's to change mysql default data directory or apart of /var/lib/mysql and for this setting you are facing this type of issue: ======================================================================== /usr/libexec/mysqld: Can't change dir to '/data/mysql/' (Errcode: 13) 100607 16:57:44 [ERROR] Aborting 100607 16:57:44 [Note] /usr/libexec/mysqld: Shutdown complete 100607 16:57:44

PHP+FPM Compilation on Centos 5

2010-05-13T23:16:00.000-07:00

Requirement: yum install libmcrypt yum install libmcrypt-devel ./configure --enable-fastcgi --enable-fpm --with-mcrypt --with-zlib --enable-mbstring --disable-pdo --with-curl --disable-debug --enable-pic --disable-rpath --enable-inline-optimization --with-bz2 --with-xml --with-zlib --enable-sockets --enable-sysvsem --enable-sysvshm --enable-pcntl --enable-mbregex --with-mhash --enable-xslt --

UDP Protocol Used For Digital Signage.!

2010-04-30T06:42:00.000-07:00

I have tested both protocol, both are UDP based and faster download. Available in interactive mode. http://tsunami-udp.sourceforge.net/ http://fsp.sourceforge.net/

Configure staging environment for Phusion Passenger.!

2010-04-15T01:06:00.000-07:00

Please follow step-by-step success is your's : LOL Copy production.rb to staging.rb in config/environments cd /app/config/environments/ cp production.rb staging.rb Add a staging entry to your config/database.yml Your database.yml is should like this : staging: adapter: mysql reconnect: false database: databae_staging username: root password: password host: localhost socket: /var/lib/mysql/

shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory

2010-04-11T23:48:00.000-07:00

Hey Guys, If you facing issue " shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory " for restarting service whaterver mysql,httpd,etc, just do "cd or cd / " on console it will resolved. [root@domU-taging]# /etc/init.d/mysqld restart shell-init: error retrieving current directory: getcwd: cannot access parent directories: No

Ruby on Rails Deployment With Open Source Technology.

2010-01-12T01:34:00.000-08:00

What We Need ? and What We Recommended. Ingredient For Deployment Recipes.Linux: CentOs 5x (Recommended).Kernel 2.6.x Flavor of any linux, Ubuntu, Gentoo , Or OpenSolaris.WebServer: Apache(Httpd) Or Nginx (Recommended Stable)Database : Mysql (Recommended Stable)ImageMagick: 6.5.8-10 (Recommended Use Latest Version)Ruby : 1.9.1 (Recommended Latest and Stable)RubyGems : 1.3.5 (Recommended Latest

Errno::EACCES (Permission denied - Permission denied - Paperclip+Jruby+RMagick4j

2009-12-09T02:02:00.000-08:00

If The issue Like:=========================================================================================== Processing UsersController#upload_photo (for 125.18.56.182 at 2009-12-09 00:29:27) [POST] Parameters: {"authenticity_token"=>"9w6TN5+/SsEp90euL2/qX/z+/v/RGkwPy7jKCmA1Z2A=", "user"=>{"photo"=>#}, "x"=>"31", "y"=>"16"} User Load (3.0ms) SELECT * FROM `users` WHERE (`users`.`id` = 29)

How To Compile Apache on Linux/Solaris.

2009-12-03T05:56:00.000-08:00

Download Source from http://httpd.apache.org/download.cgigunzip httpd-2.2.14.tar.gztar -xvf httpd-2.2.14.tar--------------------------------------------------- ./configure --prefix=/usr/local/apache2 --with-mpm=worker --disable-cgid --enable-info --enable-proxy --enable-proxy-connect --enable-proxy-ftp --enable-proxy-http --enable-proxy-balancer --enable-rewrite --enable-headers --enable-cache --

WebSite Monitoring Simple .!

2009-11-16T03:00:00.000-08:00

First of all create one /opt/monitoring.rb and /home/sites.txt -------------------------------------------------------------#!/usr/bin/rubyrequire 'net/http'require 'net/smtp'File.open("/home/sites.txt").each { |line| # get rid of CRLF line.chomp! next if(line[0..0] == '#' || line.empty?)# url, emails = line.split(' ')# emails = emails.split(",") url=

Script for Mysql Backup on Linux.

2009-11-09T04:29:00.000-08:00

#!/bin/bash# USER VARIABLESTIMESTAMP=$(date +%Y-%m-%d)MYSQLUSER=rootMYSQLPWD=passwdMYSQLHOST=localhost# PATH VARIABLESMK=/bin/mkdirGREP=/bin/grepMYSQL=/usr/bin/mysqlMYSQLDUMP=/usr/bin/mysqldump# CREATE MYSQL BACKUP# Create new backup dir$MK /backup/mysqlbackup/mysqlback_$TIMESTAMP#Dump new filesfor i in $(echo 'SHOW DATABASES;' | $MYSQL -u$MYSQLUSER -p$MYSQLPWD -h$MYSQLHOST|$GREP -v '^Database$')

Mysql Master-Slave Replication

2009-10-20T07:36:00.000-07:00

Master server ip: 10.0.0.1Slave server ip: 10.0.0.2Slave username: replSlave pw: replpasswdYour data directory is: /usr/local/mysql/data-----------------------Master Server-----------------------# Here follows entries for some specific programs# The MySQL server[mysqld]port = 3306socket = /tmp/mysql.sockskip-lockingkey_buffer_size = 256Mmax_allowed_packet = 1Mtable_open_cache

Cpanel/WHM Documentation

2009-10-16T03:15:00.000-07:00

Hi All,You may find good documentation of cPanel/WHM installation and configuration.http://twiki.cpanel.net/twiki/bin/view/AllDocumentation/WebHomeEnjoy- ;)

Shrikant Lokhande's blog | Found on IndiBlogger.in

2009-09-21T07:45:00.001-07:00

I want you to take a look at: Shrikant Lokhande's blogIt's on IndiBlogger.in, the largest, coolest and most active community of Indian bloggers!

How to change MTA on Centos5.3(RHEL based server)

2009-09-06T05:35:00.000-07:00

Here you can see, how to change MTA qmail to any other you can set as simple sendmail or postfix, exim or qmail.[root@hostshot ~]#ll /etc/alternatives/mtalrwxrwxrwx 1 root root 23 Aug 31 03:39 /etc/alternatives/mta -> /var/qmail/bin/sendmail[root@hotshot ~]# alternatives --config mtaThere are 4 programs which provide 'mta'. Selection Command-----------------------------------------------*+ 1

Problem with installation of gem mechanize nokogiri rfeedparser

2009-08-20T07:20:00.000-07:00

If the issue is with installtion of :gem install mechanize Following package needs:yum install expatyum install libexpatyum install libxml2-develyum install libxmlyum install libxml-develyum install libxslt libxslt-devyum install libxslt-develcd /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.3.3ruby ext/nokogiri/extconf.rbmake make installOr just do "gem install mechanize"--------------------------

How to "gem install mysql" ?

2009-08-20T06:39:00.000-07:00

If you trying to install mysql gem, and you are not able to install. -----------------------------------------------------gem install mysqlBuilding native extensions. This could take a while...ERROR: Error installing mysql: ERROR: Failed to build gem native extension./usr/local/bin/ruby extconf.rb install mysqlchecking for mysql_query() in -lmysqlclient... nochecking for main() in -lm...

How to set sphinx.yml for Thinking-Sphinx (full text indexer)?

2009-08-14T01:50:00.000-07:00

----------------------------------------------------------------------vi config/sphinx.ymlproduction: port: 3312 address: 127.0.0.1 mem_limit: 512M max_children: 300 max_matches: 100000 seamless_rotate: 1 preopen_indexes: 1 query_log_file: /mnt/app/rails/releases/code/log/searchd.query.log searchd_log_file: /mnt/app/rails/releases/code/log/searchd.log pid_file: /mnt/app/crawler/rails

Access remote mysql database.

2009-08-14T01:43:00.000-07:00

Grant all databases remotely to given IP address: GRANT ALL ON *.* TO root@'164.19.212.15' IDENTIFIED BY 'passwd';If you want to Particular IP address :GRANT ALL ON india.* TO root@'164.19.212.15' IDENTIFIED BY 'passwd';

Create Session table in (RoR) Ruby on Rails .!

2009-08-10T06:40:00.000-07:00

CREATE TABLE `sessions` ( `id` int(11) NOT NULL auto_increment, `session_id` varchar(255) default NULL, `data` varchar(255) default NULL, `updated_at` datetime default NULL, `created_at` datetime default NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;To change Session cookie to Active records do following setting:cat config/initializers/session_store.rb* un-comment line

MySQL Backups using LVM snapshots

2009-08-04T08:03:00.000-07:00

lvcreate -L40G -s -n dbbackup /dev/VolGroup00/LogVol03lvm> lvremove /dev/VolGroup00/dbbackupDo you really want to remove active logical volume "dbbackup"? [y/n]: ----------------------------------------------------------------------------Stapes to Install and configure LVM. fdisk -l fdisk /dev/hdb :p to print partition :n to Extend partition:eLast cylender _______ enter:n to

Ruby On Rails : "God Monitoring With backgroundrb".

2009-08-01T04:42:00.000-07:00

vi config/backgroundrb.god#--------------------------------------------------------------#run on command line with 'god -c backgroundrb.god -D' RAILS_ROOT = '/mnt/app/application/current' #load required rails and backgroundrb files require File.dirname(__FILE__) + '/boot' require File.dirname(__FILE__) + '/environment' require 'erb' $LOAD_PATH << "#{RAILS_ROOT}/vendor/plugins/backgroundrb/lib"

(98)Address already in use: make_sock: could not bind to address [::]:8000 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

2009-07-31T04:01:00.000-07:00

If You facing Problem: (98)Address already in use: make_sock: could not bind to address [::]:8000(98)Address already in use: make_sock: could not bind to address 0.0.0.0:8000no listening sockets available, shutting downFix as follows :netstat -tulpn| grep :80tcp 0 0 0.0.0.0:8028 0.0.0.0:* LISTEN 5476/(squid)tcp 0 0 :::80

How To Read File In .gz Format.

2009-07-29T00:55:00.000-07:00

Just Use This commands:---------------------------------------------------zcat maillog.1.gz | lesszcat maillog.1.gz | grep '@yahoo.co'---------------------------------------------------

Postfix installation on CentOs/Linux

2009-07-28T03:11:00.000-07:00

This is Postfix configuration on CentOs/Linux with relay, Usually people want to send bulk mail with mail server, so it will really help this post ---------------------------------------------------------------------------------------------------- yum install postfix * then change default main.cnf to main.cnf.Bak, your config file as follows: /etc/postfix/main.cf -----------------------------

ezcrypto segmentation fault error (Rails 2.3.2)

2009-07-28T02:12:00.000-07:00

There is dependency of openssl version for ezcrypto gem, fix as follows.=======================gem install ezcrypto gem list ==>*** LOCAL GEMS ***ezcrypto (0.7.2)*Check openssh Version.!rpm -q openssl-devel opensslopenssl-devel-0.9.8b-10.el5openssl-devel-0.9.8e-7.el5openssl-0.9.8b-10.el5openssl-0.9.8e-7.el5* if found openssl-devel-0.9.8b-10.el5 and openssl-0.9.8b-10.el5. Please remove from

To View Only Directory Listing In Current Path.

2009-07-21T02:34:00.000-07:00

Just do.================ls -ld */================

When PHP code showing on your Site (mod_php).

2009-07-20T07:11:00.000-07:00

If you compile apache but php is not Support, Here are the relevant lines from my httpd.conf fileAddType application/x-httpd-php .php .php4 .php3AddType application/x-httpd-php-source .phps AddType application/x-httpd-php .php4 .php3 .phtml .php AddType application/x-httpd-php-source .phps The following is for PHP3: AddType application/x-httpd-php3 .php3 AddType application/x-httpd-php3-

How to login in a remote server using SSH and no password ?

2009-07-19T23:59:00.000-07:00

Just use Two commands.=====================================ssh-keygen -t rsassh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.0.0 =====================================Simplest Way for Backup, Samba server, rsync and many more if you use.

Perlbal Configure Example.

2009-07-15T04:39:00.000-07:00

--------------------------------------------------------------------LOAD vhostsLOAD vpathsLOAD AccessControlLoad palimgLoad AccessControl#SERVER aio_mode = ioaioCREATE POOL poolserver1 POOL poolserver1 ADD 0.0.0.0:7200 POOL poolserver1 ADD 0.0.0.0:7201 POOL poolserver1 ADD 0.0.0.0:7202 POOL poolserver1 ADD 0.0.0.0:7203CREATE SERVICE site # NOTE: SSL mode only works for reverse_proxy, not

How to Perlbal as Webserver with RAILS+MONGREL ..?

2009-02-09T07:42:00.000-08:00

Hey Guys,First Resolve All dependency with modules. ---------------------------------------------Perl Module for Webserver and Balancer and Cpan Library.Cpan : cpan script version 1.03, CPAN.pm version 1.7602Danga-Socket-1.61IO-AIO-3.17Perlbal-XS-HTTPHeaders-0.19libwww-perl-5.823Sys-Syscall-0.22FleetConf-0.01_016Log-Dispatch-2.22-----------------------------------------------SSL need:Net-SSLeay-

Apache Rewrite Rules

2008-05-18T08:04:00.000-07:00

The Apache module mod_rewrite provides a powerful mechanism for hiding, redirecting, and reformatting request URLs. I just finished implementing a mod_rewrite scheme for timfanelli.com to accomplish 3 things: 1. Redirect old URLs with a 301 redirect code 2. Hide certain parts of the URL from my readers. 3. Optimize my Google pagerank.Using a two simple rewrite ruleRewriteEngine